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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

Toler?ncia de gram?neas forrageiras ao c?dmio e biodisponibilidade no solo. / Forage grasses tolerance to cadmium and bioavailability on soil.

Fonseca, Felipe Galuppo 27 November 2012 (has links)
Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T13:30:35Z No. of bitstreams: 5 40.pdf: 671743 bytes, checksum: 01827bc0544b1bc747825b4da796144b (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T16:26:30Z (GMT) No. of bitstreams: 5 40.pdf: 671743 bytes, checksum: 01827bc0544b1bc747825b4da796144b (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Made available in DSpace on 2015-02-27T16:26:30Z (GMT). No. of bitstreams: 5 40.pdf: 671743 bytes, checksum: 01827bc0544b1bc747825b4da796144b (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) Previous issue date: 2012 / Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG) / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes) / Esse trabalho foi desenvolvido com os objetivos de avaliar a toler?ncia de gram?neas forrageiras e a absor??o, ac?mulo e disponibilidade no solo de c?dmio (Cd). Os experimentos foram instalados em condi??es de casa de vegeta??o do Departamento de Agronomia da Faculdade de Ci?ncias Agr?rias da Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina (MG). As forrageiras estudadas foram: Panicum maximum cv. Aruana e cv. Tanz?nia e Brachiaria decumbens cv. Basilisk, Brachiaria brizantha cv. Xara?s e cv. Marandu e as doses de Cd foram 0, 5, 10 e 20 mg L-1 de solu??o nutritiva e 0, 2, 4 e 12 mg kg-1 de solo. O delineamento experimental foi inteiramente casualizado, com quatro repeti??es, sendo o per?odo experimental de 90 dias, em ambos os experimentos. Determinou-se a massa seca e os teores de Cd na parte a?rea, colmo e ra?zes das forrageiras. Os conte?dos de Cd foram calculados com base nos teores e nas produ??es de massa seca em cada parte da planta. No caso do experimento em solo, para avalia??o do teor de Cd foram utilizados os extratores Mehlich-1, DTPA pH 7,3, teor semitotal - USEPA 3051 e teor total - USEPA 3052. O crescimento relativo das forrageiras foi reduzido pelas doses de Cd, tanto na solu??o nutritiva quanto no solo, configurando a fitotoxidade do Cd nessas plantas. Por?m a sequ?ncia de suscetibilidade foi diferenciada para os experimentos, sendo a ordem decrescente de suscetibilidade na solu??o nutritiva a seguinte: Aruana > Tanz?nia > Xara?s > Basilisk > Marandu, enquanto no solo a sequ?ncia foi: Marandu > Xara?s > Aruana > Tanz?nia > Basilisk. Essa diferen?a de suscetibilidade ? atribu?da ?s diferentes intera??es das forrageiras com o solo. Em ambos os experimentos o teor de Cd nas forrageiras aumentou em fun??o das doses Cd. Por?m a presen?a de Cd na solu??o nutritiva fez com que o ac?mulo e ?ndice de transloca??o apresentassem resposta diferenciada para as forrageiras. Os extratores Mehlich-1 e DTPA foram eficientes para expressar o crescimento da planta. De toda forma, as forrageiras foram incapazes de limitar a absor??o e transloca??o de Cd, acarretando em toxicidade e redu??o de crescimento e altos teores de Cd em todas as partes da planta, n?o proporcionando barreira ? entrada do Cd na cadeia alimentar. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2012. / ABSTRACT This work was carried out in order to evaluate the forage grasses tolerance and the absorption, accumulation and bioavailability of cadmium (Cd) on soil. The experiments were settled under conditions of greenhouse on the Department of Agronomy of the College of Agricultural Sciences of the Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina (MG), Brazil. The forages grasses evaluated were: Panicum maximum cv. Aruana and cv. Tanz?nia and Brachiaria decumbens cv. Basilisk, Brachiaria brizantha cv. Xara?s and cv. Marandu and the four doses of Cd were: 0, 5, 10, and 20 mg l-1 and the nutrients in solution 0, 2, 4 and 12 mg kg-1 for soil, respectively. The experimental design was completely randomized with four replications, and the trial period of 90 days, in both experiments. The dry weight and concentration of Cd in shoots, stems and roots of forages were determined. The Cd content had been calculated based on the dry matter yield and content in each part of the plant. In the soil experiment, to measure the levels of Cd, there had been used the extractors Mehlich-1, DTPA pH 7.3, semi total content - USEPA 3051 and total content - USEPA 3052. The relative growth of the forage grasses was reduced with doses of Cd applied, both in the nutrient solution and on the soil, setting the phytotoxicity of Cd in these plants. However the sequence of susceptibility was different t tohe experiments, the decreasing order of susceptibility in the nutrient solution was: Aruana> Tanzania> Xara?s> Basilisk > Marandu, while in soil the sequence was: Marandu> Xara?s> Aruana> Tanzania> Basilisk. This difference in susceptibility is attributed to the different interactions of forage with soil. In both experiments (soil and nutrient solution) the Cd content in the forage increased due of increasing doses of Cd. Nevertheless the presence of Cd in the nutritive solution has made the accumulation and translocation index differently for the forages. Mehlich-1 and DTPA showed high positive correlation with relative growth of forages. The forages were unable to limit the absorption and translocation of Cd, resulting in toxicity and declining growth and high levels of Cd in all parts of the plant, providing no barrier to entry of Cd into the food chain.
22

Crescimento de Brachiaria brizantha e seu potencial para remedia??o de solo contaminado com picloram em tr?s valores de pH. / Development Brachiaria brizantha and its potential for remediation of soil contaminated with picloram at three pH levels.

Braga, Renan Rodrigues 22 March 2013 (has links)
Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T13:30:35Z No. of bitstreams: 5 45.pdf: 345535 bytes, checksum: c3649a3cfc01189e92c6e9258cbcfc4a (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T18:12:58Z (GMT) No. of bitstreams: 5 45.pdf: 345535 bytes, checksum: c3649a3cfc01189e92c6e9258cbcfc4a (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Made available in DSpace on 2015-02-27T18:12:58Z (GMT). No. of bitstreams: 5 45.pdf: 345535 bytes, checksum: c3649a3cfc01189e92c6e9258cbcfc4a (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) Previous issue date: 2013 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG) / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes) / O Brasil possui imensas ?reas de pastagens e a esp?cie mais cultivada ? a Brachiaria brizantha. O controle das plantas daninhas nestas ?reas ? realizado predominantemente pelo uso de herbicidas com longo per?odo residual, destacando-se o picloram. Este ? utilizado no controle de plantas daninhas de folhas largas perenes e tem sido intensamente pesquisado em fun??o da alta meia vida nos solos, sendo sua persist?ncia dependente do clima e atributos ed?ficos, como textura e pH. Objetivou-se com este trabalho avaliar o desenvolvimento e o potencial remediador de B. brizantha em solo contaminado com picloram em diferentes n?veis de pH. O delineamento experimental utilizado foi em blocos casualizados, com quatro repeti??es e com faixa de pH variando entre 4,5 e 5,6. Cultivou-se a forrageira at? a flora??o, quando se determinou a massa da mat?ria seca dos componentes da planta e posteriormente, cultivou-se plantas de pepino como indicadores da presen?a do herbicida. O picloram causou redu??o no ac?mulo da massa da mat?ria seca total das plantas de B. brizantha, em consequ?ncia do efeito negativo sobre a produ??o de ra?zes, independente do pH do solo. Nas folhas o herbicida promoveu redu??o na massa da mat?ria seca em solo com maior pH. Nos tratamentos com maior valor de pH, na profundidade de 35 cm, constatou-se maior ac?mulo de massa da mat?ria seca de ra?zes quando n?o se aplicou o herbicida, indicando que em solos menos ?cidos o herbicida tende a prejudicar o desenvolvimento de ra?zes da forrageira em maiores profundidades. A B. brizantha reduziu a concentra??o de picloram na camada superficial de solo, o que pode ser atribu?do a sua capacidade de degradar o herbicida e tamb?m ao fato desta absorver e exsudar o herbicida ao longo das camadas de solo. Observou-se tamb?m que em solos com maiores valores de pH o herbicida tem maior potencial de lixivia??o, principalmente quando n?o cultivado com B. brizantha. Solos com menores valores de pH tendem ? maior sor??o do herbicida, e consequentemente, a maior concentra??o do mesmo em camadas intermedi?rias. Pode-se concluir que altas concentra??es de picloram no solo s?o nocivas ao crescimento da B. brizantha, principalmente sob condi??es de solos menos ?cidos e esta forrageira pode ser usada para remedia??o de solos contaminados por picloram e na preven??o de sua lixivia??o, que ? maior em solos tratados com calc?rio. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2013. / ABSTRACT Brazil has vast areas of pasture and the specie most widely cultivated is Brachiaria brizantha. The weed control in these areas is carried out predominantly using herbicides of long residual period, highlighting the picloram. This herbicide is used for weed control broadleaf evergreen and has been intensively investigated due to the high half-life in soil, and their persistence dependent on climate and soil attributes such as texture and pH. The aim of this work was to evaluate the development and potential remediation of B. brizantha in soil contaminated with picloram at different pH levels. The experimental design was a randomized block with four replications and pH among 4.5 and 5.6. The forage was grown up to flowering, when determined the dry weight of the plant components and subsequently were cultivated cucumber plants such as bioindicators of presence of the herbicide. The picloram caused reduction of total dry matter accumulation of B. brizantha, consequently to negative effect on root production, regardless soil pH. The herbicide caused a reduction of leaf dry matter on plants cultivated in higher soil pH. In treatments of high pH value at a depth of 35 cm, there was greater accumulation of dry matter of roots when the herbicide was not applied, indicating that in less acid soils the herbicide tends to hinder the development of grass root at greater depths. B. brizantha reduced picloram concentration in the soil shallow layer, which can be attributed to its ability of degrade the herbicide, and also by fact of absorption and exudation herbicide along the soil layers. In higher pH soils also observed that ??the herbicide has higher potential for leaching, mainly when not cultivated B. brizantha. Soils with lower pH values ??tend to greater sorption of the herbicide, and consequently, a higher concentration of the same in the intermediate layers. Concluded that high concentrations of picloram in the soil are harmful to the growth of B. brizantha, mainly under conditions of soils less acidic and this forage can be used for remediation of soils contaminated by picloram and preventing leaching, which is greater in soils treated with lime.
23

Produtividade, qualidade e conserva??o p?s-colheita de frutos de diferentes cultivares de morangueiro. / Productivity, quality and postharvest fruit of different strawberry cultivars.

Guimar?es, Amanda Gon?alves 22 March 2013 (has links)
Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T13:30:35Z No. of bitstreams: 5 46.pdf: 563320 bytes, checksum: 2d37cc7b9055ca38cdcd9948b229ca60 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T18:14:39Z (GMT) No. of bitstreams: 5 46.pdf: 563320 bytes, checksum: 2d37cc7b9055ca38cdcd9948b229ca60 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Made available in DSpace on 2015-02-27T18:14:39Z (GMT). No. of bitstreams: 5 46.pdf: 563320 bytes, checksum: 2d37cc7b9055ca38cdcd9948b229ca60 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) Previous issue date: 2013 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes) / O objetivo deste trabalho foi avaliar a produtividade, qualidade e ? conserva??o p?s-colheita de frutos de diferentes cultivares de morangueiro. Os experimentos foram conduzidos na fazenda Mape Frutas Ltda, localizada em Datas-MG, e no laborat?rio de Tecnologia de Biomassa do Cerrado, da UFVJM. Foram avaliadas oito cultivares de morangueiro: seis de dias curtos (Festival, Campinas, Toyonoka, Dover, Oso Grande e Camarosa), e duas de dias neutros (Diamante, Aromas), utilizando-se delineamentos estat?sticos espec?ficos para cada experimento. Os frutos foram colhidos duas vezes por semana no per?odo de maio a outubro de 2012. A cultivar Dover foi a que produziu maior n?mero de mudas por matriz e maior n?mero de mudas por hectare. As cultivares Aromas e Diamante apresentaram as maiores produtividades precoces de frutos. N?o foram observadas diferen?as significativas entre as cultivares para a produ??o por planta e para a produtividade total de frutos, exceto para a cultivar Toyonoka que apresentou os menores valores para essas caracter?sticas. As cultivares Camarosa, Diamante, Festival e Oso Grande apresentaram as maiores produ??es comerciais por planta e as maiores produtividades comerciais de frutos. As maiores produtividades totais foram obtidas nos meses de junho, julho e setembro. J?s as maiores produtividades comerciais foram obtidas no m?s de junho. As cultivares Camarosa, Festival e Toyonoka apresentaram as melhores caracter?sticas f?sico-qu?micas e antioxidantes. A cultivar Toyonoka apresentou a menor quantidade de aer?bicos mes?filos totais e a cultivar Oso Grande a menor quantidade de bolores e leveduras. Os frutos colhidos no m?s de outubro apresentaram maiores teores de a??cares redutores totais, vitamina C, fen?licos, antocianina, caroten?ides, s?lidos sol?veis e atividade antioxidante. A perda de massa dos frutos ? maior em condi??es de armazenamento ambiente quando comparado com o armazenamento em c?mara fria. O armazenamento em c?mara fria proporciona maior conserva??o p?s-colheita de frutos de morangueiro. Em condi??o ambiente os frutos podem ser armazenados por no m?ximo tr?s dias. J? em c?mara fria o armazenamento de frutos de morangueiro pode se prolongar por at? doze dias. A cultivar Toyonoka apesar de apresentar as melhores caracter?sticas f?sico-qu?micas, apresenta, juntamente com a cultivar Campinas, maiores incid?ncia de doen?as, maior perda de massa e menor firmeza dos frutos em rela??o as demais cultivares, havendo necessidade de ado??o de outras pr?ticas de conserva??o dos frutos. A perda de massa e a incid?ncia de doen?as afetam negativamente a apar?ncia dos frutos de morangueiro durante o armazenamento em c?mara fria, enquanto que em condi??o ambiente a incid?ncia de doen?as diminui a qualidade da apar?ncia dos frutos de morangueiro. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2013. / ABSTRACT The aim of this study was to evaluate the productivity, quality and postharvest fruit of different strawberry cultivars. The experiments were conducted on the Mape Fruits Farm Ltda, located in Datas - MG, in the Laboratory of Biomass Technology of the Cerrado, in the UFVJM. We assessed eight strawberry cultivars: six short days (Festival, Campinas, Toyonoka, Dover, Oso Grande and Camarosa), and two neutral days (Diamante, Aromas), using statistical designs specific to each experiment. The fruits were harvested twice a week from May to October 2012. Cultivar Dover was the one that produced the largest number of seedlings per array and larger number of seedlings per hectare. The Aromas and Diamante showed greater yield early fruit. There were significant differences among cultivars for plant production and overall productivity of fruits, except for the cultivar Toyonoka presented the lowest values ??for these features. The cultivars Camarosa, Diamante, Oso Grande Festival and had the highest yields per plant and commercial greatest commercial yields of fruit. The highest total productivities were obtained in the months of June, July and September. The greatest commercial yields were obtained in June. The cultivars Camarosa, Festival and Toyonoka showed the best physical and chemical characteristics and antioxidants properties. Cultivar Toyonoka had the lowest amount of aerobic mesophilic and Oso Grande cultivated the least amount of mold and yeast. Fruit harvested in October showed higher levels of total reducing sugars, vitamin C, phenolics, anthocyanin, carotenoids, antioxidant activity and soluble solids. The mass loss of the fruits is increased in ambient storage conditions when compared to cold storage. The cold storage provides greater post-harvest conservation of strawberry fruits. In natural conditions the fruits can be stored for a maximum of three days. Already in cold storage of strawberry fruits can be extended for up to twelve days. Cultivar Toyonoka despite having the best physical and chemical characteristics, features coupled with the variety Campinas, higher incidence of disease, greater weight loss and lower fruit firmness compared with other cultivars, requiring adoption of other conservation practices fruits. The weight loss and the incidence of diseases negatively affect the appearance of the fruit of strawberry during storage in a cold chamber at ambient condition while the incidence of disease decreases the quality of the appearance of the fruit of strawberry.
24

Popula??es, matrizes e idade da planta na express?o de vari?veis f?sicas, qu?micas e f?sico-qu?micas em frutos do pequizeiro (Caryocar brasiliense Camb.). / Population, mother tree and plant age effects on the expression of physical, chemical and physic-chemical traits on pequi (Caryocar brasiliense Camb.) fruits.

Lima e Silva, Fernando Higino de 22 November 2011 (has links)
Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T13:30:34Z No. of bitstreams: 5 36.pdf: 448536 bytes, checksum: a5dbf2e4dce517f8347874ee986cea66 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T18:39:06Z (GMT) No. of bitstreams: 5 36.pdf: 448536 bytes, checksum: a5dbf2e4dce517f8347874ee986cea66 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Made available in DSpace on 2015-02-27T18:39:06Z (GMT). No. of bitstreams: 5 36.pdf: 448536 bytes, checksum: a5dbf2e4dce517f8347874ee986cea66 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) Previous issue date: 2011 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes) / O objetivo do presente trabalho foi estimar os efeitos de popula??es, matrizes e idade da planta na express?o de vari?veis f?sicas, qu?micas e f?sico-qu?micas de frutos de pequizeiro. Colheram-se frutos oriundos de 15 matrizes em Curvelo e 15 em S?o Gon?alo do Rio Preto, Minas Gerais. A amostragem foi feita de maneira a se ter, em cada popula??o, matrizes com diferentes di?metros de tronco, sendo este ?ltimo uma estimativa da idade da planta. Para todas as vari?veis foram tomados dez frutos por matriz e as vari?veis qu?micas e f?sico-qu?micas foram avaliadas em cinco matrizes de cada popula??o. Avaliaram-se, em cada fruto, as vari?veis f?sicas: peso total; peso do mesocarpo externo; peso total dos put?mens; peso m?dio dos put?mens; n? de put?mens; peso total de polpa; e peso m?dio de polpa. As vari?veis qu?micas e f?sico-qu?micas, avaliadas na polpa, foram: umidade; cinzas; lip?deos; prote?nas; carboidratos totais; pH; s?lidos sol?veis totais; e acidez total titul?vel. O efeito de matrizes foi altamente significativo para todas as vari?veis avaliadas (P<1%), enquanto o de popula??es foi apenas para duas vari?veis (5%<P<10%). As estimativas das correla??es entre as vari?veis f?sicas avaliadas foram todas positivas, algumas significativas, enquanto que para as vari?veis qu?micas e f?sico-qu?micas observaram-se estimativas positivas e negativas, a maioria n?o significativa. As estimativas das correla??es entre o di?metro do tronco e as vari?veis f?sicas foram todas positivas, significativas apenas para duas vari?veis (P<5%). Para as vari?veis qu?micas e f?sico-qu?micas, observaram-se correla??es positivas e negativas, por?m n?o significativas. A sele??o de matrizes no campo para as caracter?sticas avaliadas que apresentaram correla??es n?o significativas ou significativas positivas deve promover ganhos gen?ticos nos descendentes se estes forem obtidos por propaga??o vegetativa, o mesmo n?o se podendo afirmar para descendentes obtidos por via sexuada. A idade da matriz n?o deve alterar os ganhos gen?ticos para estas vari?veis. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2011. / ABSTRACT The present work aimed to estimate population, mother tree and plant age effects on the expression of physical, chemical and physic-chemical traits on pequi fruits Seeds were collected from two populations and fifteen mother trees in each population, one located at Curvelo and another at S?o Gon?alo do Rio Preto, both from Minas Gerais State. The sampling was done in a way to sample trees among a range of trunk diameters, the last trait being an estimate of the tree age. Physical traits, evaluated on each of ten fruits sampled from all harvested trees, were: fruit total weight; external mesocarp weight; total weight of put?mens; mean weight of put?mens; number of put?mens; total weight of pulp; and mean weight of pulp. Chemical and physic-chemical traits, evaluated in five trees from each population, were: humidity; ashs; lipids; proteins; total carbohydrate; pH; total soluble solids; and total acidity. The mother trees effects were significant for all traits (P<1%), while the populations were only for two traits (5%<P<10%). Estimates of correlations among physical traits were all positive and some of them significant. For chemical and physic-chemical traits there were positive and negative correlations, most not significant. Estimates of correlations between trunk diameter and each physical variable were all positive, being significant for two traits (P<5%). Positive and negative but not significant correlations were observed for chemical and physic-chemical traits. Mother tree selection for traits that showed non significant or significant and positive correlations with trunk diameter may promote genetic gain in their descendents for vegetative propagation but the same assertion can?t be said when propagation is carried out by seeds. Mother tree age is not expected to cause any effect in genetic gains for these traits.
25

Resist?ncia de linhagens de tomateiro ? tra?a Tuta absoluta, relacionada a aleloqu?micos e ? densidade de tricomas. / Resistance of tomato linea to the south american pinwrm tuta absoluta is related to allelochemical contents and to trichome densities.

Oliveira, Celso Mattes de 15 February 2011 (has links)
Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T13:30:34Z No. of bitstreams: 5 39.pdf: 622297 bytes, checksum: f0b6a4c72e9ca840834c09213d059a4b (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T18:45:27Z (GMT) No. of bitstreams: 5 39.pdf: 622297 bytes, checksum: f0b6a4c72e9ca840834c09213d059a4b (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Made available in DSpace on 2015-02-27T18:45:27Z (GMT). No. of bitstreams: 5 39.pdf: 622297 bytes, checksum: f0b6a4c72e9ca840834c09213d059a4b (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) Previous issue date: 2011 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes)/MEC / Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG) / Funda??o de Apoio ao Ensino, Pesquisa e Extens?o (FAEPE) / Comparou-se a efetividade de linhagens melhoradas de tomateiro, ricas em 2-tridecanona (2-TD), zingibereno (ZGB) e acila??cares (AA), ou no tocante aos n?veis de resist?ncia ? tra?a-do-tomateiro Tuta absoluta. Tamb?m verificou-se se linhagens selecionadas para maiores densidades de tricomas glandulares, presumivelmente com maiores n?veis de 2-tridecanona, ? efetiva no sentido de promover maior resist?ncia ? tra?a. Como testemunhas suscet?veis foram utilizadas as linhagens TOM-584 e TOM-679, com n?vel normal dos tr?s aleloqu?micos. A linhagem melhorada TOM-687 (com alto teor de AA) foi utilizada como linhagem resistente padr?o, por ter sua resist?ncia amplamente documentada, juntamente com o tamb?m resistente acesso selvagem PI134417 (com alto teor de 2-TD). O experimento foi instalado em casa de vegeta??o em delineamento inteiramente casualizado. O acesso selvagem PI 134417 confirmou-se como altamente resistente. TOM-622 (rica em 2-TD), ZGB-703 (rica em ZGB) e TOM-687 apresentaram diminui??es significativas na ovoposi??o da tra?a-do-tomateiro, bem como no dano geral na planta, les?o nos fol?olos e porcentagem de fol?olos atacados, comparadas ?s testemunhas TOM-584 e TOM-679. Os n?veis de resist?ncia ? tra?a em TOM-622, ZGB-703 e TOM-687 foram similares entre si. Em geral os gen?tipos selecionados para maiores densidades de tricomas glandulares apresentaram n?veis de resist?ncia tamb?m superiores aos das testemunhas suscet?veis, destacando entre eles o tratamento BPX-367D-238-02. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2011. / ABSTRACT In Brazil the Cactaceae is represented by 160 species from which 26% occur on the rocky fields. Cipocereus minensis is an endemic Cactaceae from the rocky fields in the Minas Gerais? portion of the Espinha?o chain. In this research it was intended to evaluate the rhythms of flower and fruit production of the species, its floral and reproductive biology, and also know the floral visitors and the likely seed dispersers, in an area of the rocky fields of the Diamantina ? MG?s plateau. Seed germination tests have been performed and the initial plant growth on different substrates was analyzed. The species had floral traits such as nocturnal anthesis, white flowers, abundant volume of nectar and rigid perianth structures that suggested pollination by bats. However daily visitors as hummingbirds were also observed. The reproductive system of C. minensis is alogamic and self incompatible and the night visitors were more efficient than the daytime ones in the formation of fruits. The phenologic pattern of flowering and fruiting is sub-annual, with peak of flowering at the beginning and middle of the dry season, in april and july, respectively. Another peak was observed in the wet season in november, with lower production of flowers, but with a higher flower/fruit conversion rate . C. minensis is well adapted to the climatic seasonality. The fruits showed significant differences with respect to collection time for the length, diameter and weight, with higher measures in the wet season. The average number of seeds per fruit was 958.63 ? 369.35, the weight of 1000 seeds was 0.53 g and the mean length of the seeds was 1.5 mm. The highest germination rates were found after nine and twelve months of storage (75% and 72%, respectively) or in fruits collected with a more advanced stage of ripening (72%).In the initial growth the plants showed a higher diameter and height on the substrate prepared in the ratio 1:1:1, composed of sand, red soil and cow dung. The store promotes germination, but also in fruits collected in a more advanced stage of maturation. Substrates with better drainage and aeration favoring better initial development of this plant species. This information will provide subsidies for the development of strategies of conservation and management of the species.
26

Adequa??es metodol?gicas para os testes de vigor em sementes de Brachiaria brizantha. / Methodological adjustments to the vigor tests in Brachiaria brizantha seeds.

Oliveira, Ariadne Santos 01 February 2013 (has links)
Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T13:30:35Z No. of bitstreams: 5 41.pdf: 467693 bytes, checksum: 46ea478cf12119fee773189de4a6bf91 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T18:50:14Z (GMT) No. of bitstreams: 5 41.pdf: 467693 bytes, checksum: 46ea478cf12119fee773189de4a6bf91 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Made available in DSpace on 2015-02-27T18:50:14Z (GMT). No. of bitstreams: 5 41.pdf: 467693 bytes, checksum: 46ea478cf12119fee773189de4a6bf91 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) Previous issue date: 2013 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes) / Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG) / Dentre as esp?cies mais utilizadas na implanta??o de pastagens est?o as do g?nero Brachiaria. Os benef?cios do uso de sementes de alta qualidade para forma??o de pastagem podem ser facilmente constatados pelo r?pido estabelecimento da forrageira, pastagem formada uniformemente e cobertura mais r?pida do solo, resultando em uma utiliza??o da pastagem em menor espa?o de tempo. Por?m, as metodologias utilizadas para avaliar a qualidade de suas sementes ainda n?o est?o bem definidas. O uso de testes de vigor ? uma ferramenta imprescind?vel para a avalia??o do potencial fisiol?gico dos lotes de sementes. Assim, objetivou-se com este estudo adequar os testes de envelhecimento acelerado e de condutividade el?trica, para avaliar o potencial fisiol?gico de lotes de sementes de Brachiaria brizantha das cultivares Marandu e Xara?s, cada uma delas representada por quatro lotes. Para o teste de envelhecimento acelerado as sementes foram submetidas ao envelhecimento acelerado tradicional e com solu??o saturada de NaCl, em cinco per?odos de envelhecimento, 0; 24; 48; 72 e 96 horas. Para o teste de condutividade el?trica, as sementes foram submetidas a 12 per?odos de imers?o em ?gua, por 2; 4; 6; 8; 10; 12; 14; 16; 18; 20; 22 e 24 horas, utilizando-se 25 sementes em 25 mL e em 50 mL, 50 sementes em 50 mL e em 75 mL de ?gua. Para caracterizar o perfil dos lotes, foi determinado o grau de umidade, os testes de germina??o, primeira contagem da germina??o, ?ndice de velocidade de germina??o, estande inicial, emerg?ncia e ?ndice de velocidade de emerg?ncia. Conclui-se que o teste de envelhecimento acelerado possibilita a separa??o dos lotes de B. brinzatha cv. Marandu e cv. Xara?s, pelo m?todo com solu??o saturada de NaCl por 72 horas e 24 horas, respectivamente. No teste de condutividade el?trica, o per?odo de imers?o de 14 horas, utilizando-se 50 sementes em 50 mL, para a cv Marandu, e utilizando-se 25 sementes em 25 mL ou 50 sementes em 50 mL de ?gua, para a cv Xara?s ? adequado para avalia??o do potencial fisiol?gico das sementes. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2013. / ABSTRACT Among the species most commonly used in the implementation of the pastures are of the genus Brachiaria. The benefits of using high quality seeds for pasture formation can be easily found by the rapid establishment of forage, pasture formed uniformly and cover the ground more quickly, resulting in a pasture utilization in shorter time. However, the methodologies used to evaluate the quality of their seeds are still poorly defined. The use of vigor testing is an essential implement for the evaluation of the physiological potential of seed lots. The objective of this research was adjust the accelerated aging tests and electrical conductivity, to evaluate the physiological potential of seed lots from Brachiaria brizantha Marandu and Xara?s cultivars, each represented by four lots. For the accelerated aging test, seeds were submitted to traditional accelerated aging and with saturated NaCl solution, five periods of aging, 0, 24, 48, 72 and 96 hours. For the electrical conductivity test, seeds were submitted to 12 periods of imbibitions in water for 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22 and 24 hours, using samples of 25 seeds in 25 mL and 50 mL, 50 seeds in 50 mL and 75 mL of water. To characterize the profile of lots, were determined moisture content, germination tests, first count of germination, speed of germination, initial stand, emergence, and? speed of emergence index. The accelerated aging test makes possible the separation of lots of B. brinzatha cv Marandu and cv Xara?s by the method with saturated NaCl solution for 72 hours and 24 hours, respectively. For the electrical conductivity test, the imbebition period during 14 hours using 50 seeds in 50 mL to Marandu and using 25 seeds in 25 mL or 50 seeds in 50 mL of water for cultivar Xara?s is appropriate for evaluating the seed physiological potential.
27

Competi??o entre mudas de oliveira (Olea europaea L.) e plantas daninhas. / Competition between olive nursery trees (Olea europaea L.) and weeds.

Martins, Larissa Madureira 31 July 2012 (has links)
Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T13:30:35Z No. of bitstreams: 5 43.pdf: 544294 bytes, checksum: cfadb6b62ac14a80b845bf3c73c07552 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T18:58:40Z (GMT) No. of bitstreams: 5 43.pdf: 544294 bytes, checksum: cfadb6b62ac14a80b845bf3c73c07552 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Made available in DSpace on 2015-02-27T18:58:42Z (GMT). No. of bitstreams: 5 43.pdf: 544294 bytes, checksum: cfadb6b62ac14a80b845bf3c73c07552 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) Previous issue date: 2012 / Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG) / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes) / O entendimento da interfer?ncia promovida pelas esp?ciesexistentesna comunidadede plantas daninhas doolival esuas densidadesrelativas s?oconsidera??es importantes nomanejo dessas plantas para manter o equil?brio da competi??o, permitindo que o cultivo da oliveira seja beneficiado. A pesquisa foi realizada com o objetivo de avaliar a capacidade competitiva de mudas de oliveira cultivadas com diferentes esp?cies e densidades de plantas daninhas sobre o crescimento vegetativo e os teores de nutrientes. Para avaliar a capacidade de competi??o da oliveira com as plantas daninhas foram conduzidos tr?s experimentos em casa de vegeta??o do Setor de Fruticultura da Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM), Diamantina, MG. No primeiro experimento avaliou-se o crescimento inicial de mudas de duas cultivares de oliveira ?Arbequina? e ?Koroneiki? convivendo com cinco esp?cies de plantas: Bidens pilosa, Brachiaria brizantha, Cenchrus echinatus,Canavalia ensiformis e Lupinus albus, e um tratamento sem conviv?ncia com plantas daninhas por um per?odo de 60 dias. Observou-se que a cultivar Arbequina mostrou-se mais tolerante a interfer?ncia das esp?cies de plantas. B. pilosa, C. ensiformes e L. albus foram as esp?cies com maior potencial de interfer?ncia no crescimento inicial das mudas de oliveira. No segundo, avaliou-se o crescimento de duas cultivares de oliveira, ?Arbequina? e ?Ascolano? cultivadas com quatro esp?cies de plantas competidoras, Amaranthus retroflexus, B. brizantha, B. pilosa, e C. echinatus e as testemunhas, que foram as mudas de oliveiras e as plantas daninhas de cada esp?cie sem competi??o por um per?odo de 90 dias. A competi??o com as plantas daninhas interferiu no crescimento e nos teores de nutrientes de mudas de oliveira. A ?Ascolano? mostrou-se mais tolerante a competi??o com as esp?cies de plantas daninhas. A. retroflexus e B. pilosa foramas esp?cies com maior potencial de competi??o com mudas de oliveira. No terceiro experimento, foi avaliada a conviv?ncia das mudas de oliveira ?Arbequina? e ?Ascolano? com cinco densidades de B.brizantha, zero, uma, duas, tr?s e quatro plantas por vaso por um per?odo de 70 dias. Observou-se que a B. brizantha interferiu negativamente no crescimento vegetativo da oliveira. A cultivar ?Ascolano? apresentou maior capacidade competitiva com todas as densidades de B. brizantha. O aumento da densidade de B. brizantha interferiu no estado nutricional das mudas de oliveira. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2012. / ABSTRACT Understanding of the interference promoted by species existing in weed community of olive groves and their densities are important considerations in management of these plants to maintain the competition balance, allowing the cultivation of olive trees be favored. The research was conducted with the aim of evaluate the competitive ability of olive nursery trees grown with different species and weed densities on vegetative growth and nutrients contents. Three experiments was conducted in a greenhouse of Setor de Fruticultura of Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM), Diamantina, MG to evaluate the competition ability of olive tree with the weeds. The first experiment evaluated the nursery tree growth of two olive cultivars ?Arbequina? and ?Koroneiki? coexisting with five plant species: Bidens pilosa, Brachiaria brizantha, Cenchrus echinatus, Canavalia ensiformis and Lupinus albus and one treatment without coexistence for a period of 60 days. It was observed that the ?Arbequina? cultivar was more tolerant to interference of plant species. B. pilosa, C. ensiformes and L. albus were the species with greater potential for interference on the growth of olive nursery trees. In the second it was evaluated the growth of two olive cultivars, ?Arbequina? and ?Ascolano? planted with four species of competing plants, B. brizantha, A. retroflexus, B. pilosa and C. echinatus and the controls, which were the olive nursery trees and the weeds of each species without competition for a period of 90 days. Competition with weeds affected the growth and nutrients contents of olive nursery trees. ?Ascolano? was more tolerant to the competition with weed species. The species A. retroflexus and B. pilosa were the species with the greatest potential competition with olive nursery tree. In the third experiment was evaluated the relationship between the olive nursery trees ?Arbequina? and ?Ascolano? with four densities of B. brizantha zero, one, two, three and four plants per pot for a period of 70 days. It was observed that B. brizantha affected negatively in vegetative growth of olive nursery trees. The cultivar ?Ascolano? showed greater competitive ability with all densities of B. brizantha. The increased density of B. brizantha affected the nutritional status of olive nursery trees.
28

Fenologia, biologia reprodutiva, germina??o e desenvolvimento inicial de Cipocereus minensis subsp. leiocarpus N.P. Taylor & Zappi (Cactaceae) no planalto de Diamantina-MG / (Phenology, reproductive biology, germination and initial development of the Cipocereus minensis subsp. leiocarpus N.P.Taylor & Zappi (Cactaceae) in the plateau of Diamantina-MG).

Lopes, Liliane Teixeira January 2012 (has links)
Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T13:30:35Z No. of bitstreams: 5 47.pdf: 2283518 bytes, checksum: 0cb380e74b0df649714290d50610a24f (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T19:01:57Z (GMT) No. of bitstreams: 5 47.pdf: 2283518 bytes, checksum: 0cb380e74b0df649714290d50610a24f (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Made available in DSpace on 2015-02-27T19:01:57Z (GMT). No. of bitstreams: 5 47.pdf: 2283518 bytes, checksum: 0cb380e74b0df649714290d50610a24f (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) Previous issue date: 2012 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes) / (Fenologia, biologia reprodutiva, germina??o e desenvolvimento inicial de Cipocereus minensis subsp. leiocarpus N.P.Taylor & Zappi (Cactaceae) no planalto de Diamantina-MG). No Brasil a fam?lia Cactaceae ? representada por 160 esp?cies, das quais 26% ocorrem em campos rupestres. Cipocereus minensis ? uma Cactaceae end?mica dos campos rupestres da por??o mineira da cadeia do Espinha?o. Neste estudo pretendeu-se avaliar os ritmos de produ??o de flores e frutos da esp?cie, sua biologia floral e reprodutiva, al?m de conhecer seus visitantes florais e prov?veis dispersores de sementes, numa ?rea de campo rupestre do planalto de Diamantina-MG. Foram realizados testes de germina??o de sementes e avaliado o desenvolvimento inicial das plantas em diferentes substratos. A esp?cie apresentou caracter?sticas florais como antese noturna, flores brancas, volume abundante de n?ctar e estruturas do perianto r?gidas que sugeriram poliniza??o por morcegos. No entanto, observou-se tamb?m a presen?a de polinizadores diurnos como beija-flores. O sistema reprodutivo de C. minensis ? alog?mico, auto-incompat?vel e os visitantes noturnos foram mais eficientes que os diurnos na forma??o de frutos. O padr?o fenol?gico de flora??o e frutifica??o ? subanual, com picos de flora??o no in?cio e meio da esta??o seca, em abril e julho, respectivamente. Um outro pico foi observado na esta??o ?mida, em novembro, com menor produ??o de flores, por?m com maior taxa de convers?o flor/fruto. C. minensis ? uma esp?cie bem adaptada ? sazonalidade clim?tica. Os frutos apresentaram diferen?as significativas com rela??o ? ?poca de coleta quanto ao comprimento, di?metro e peso, com maiores valores na esta??o ?mida. A m?dia do n?mero de sementes por fruto foi de 958,63 ? 369,35, o peso de 1000 sementes foi de 0,53 g e a m?dia do comprimento das sementes foi de 1,5 mm. As maiores taxas de germina??o foram obtidas ap?s nove e doze meses de armazenamento (75% e 72%, respectivamente), ou em frutos coletados no est?gio mais avan?ado de matura??o (72%). No crescimento inicial as plantas apresentaram maiores di?metros e alturas no substrato preparado na propor??o 1:1:1, composto de areia, solo vermelho e esterco de boi. O armazenamento favoreceu a germina??o, que tamb?m foi alta em frutos coletados em est?gios mais avan?ados de matura??o. Substratos com melhor drenagem e aera??o favoreceram um melhor desenvolvimento inicial de plantas dessa esp?cie. Estas informa??es dar?o subs?dios para o desenvolvimento de estrat?gias de conserva??o e manejo da esp?cie. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2012. / ABSTRACT In Brazil the Cactaceae is represented by 160 species from which 26% occur on the rocky fields. Cipocereus minensis is an endemic Cactaceae from the rocky fields in the Minas Gerais? portion of the Espinha?o chain. In this research it was intended to evaluate the rhythms of flower and fruit production of the species, its floral and reproductive biology, and also know the floral visitors and the likely seed dispersers, in an area of the rocky fields of the Diamantina ? MG?s plateau. Seed germination tests have been performed and the initial plant growth on different substrates was analyzed. The species had floral traits such as nocturnal anthesis, white flowers, abundant volume of nectar and rigid perianth structures that suggested pollination by bats. However daily visitors as hummingbirds were also observed. The reproductive system of C. minensis is alogamic and self incompatible and the night visitors were more efficient than the daytime ones in the formation of fruits. The phenologic pattern of flowering and fruiting is sub-annual, with peak of flowering at the beginning and middle of the dry season, in april and july, respectively. Another peak was observed in the wet season in november, with lower production of flowers, but with a higher flower/fruit conversion rate . C. minensis is well adapted to the climatic seasonality. The fruits showed significant differences with respect to collection time for the length, diameter and weight, with higher measures in the wet season. The average number of seeds per fruit was 958.63 ? 369.35, the weight of 1000 seeds was 0.53 g and the mean length of the seeds was 1.5 mm. The highest germination rates were found after nine and twelve months of storage (75% and 72%, respectively) or in fruits collected with a more advanced stage of ripening (72%).In the initial growth the plants showed a higher diameter and height on the substrate prepared in the ratio 1:1:1, composed of sand, red soil and cow dung. The store promotes germination, but also in fruits collected in a more advanced stage of maturation. Substrates with better drainage and aeration favoring better initial development of this plant species. This information will provide subsidies for the development of strategies of conservation and management of the species.
29

Seletividade de herbicidas aplicados nas culturas do milho e do eucalipto em insetos de controle biol?gico. / Selectivity of herbicides applied in maize and eucalyptus under insect of biological control.

Menezes, Claubert Wagner Guimar?es de 11 July 2012 (has links)
Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T13:30:35Z No. of bitstreams: 5 48.pdf: 312989 bytes, checksum: d64deaf4dec63e71c21cf34cb462dbbf (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T19:04:02Z (GMT) No. of bitstreams: 5 48.pdf: 312989 bytes, checksum: d64deaf4dec63e71c21cf34cb462dbbf (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Made available in DSpace on 2015-02-27T19:04:05Z (GMT). No. of bitstreams: 5 48.pdf: 312989 bytes, checksum: d64deaf4dec63e71c21cf34cb462dbbf (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) Previous issue date: 2012 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes) / Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG) / O manejo das plantas daninhas ? necess?rio nas culturas agr?colas para que se evite a competi??o e perdas na produ??o. O uso de herbicidas ? comum no controle das plantas daninhas, e pode causar impacto negativo ao meio ambiente. O objetivo desse trabalho foi avaliar a seletividade de herbicidas, aplicados nas culturas do milho e do eucalipto, sobre os insetos de controle biol?gico de pragas Podisus nigrispinus Dallas, 1851 (Heteroptera Pentatomidae) e Palmistichus elaeisis Delvare & LaSalle, 1993 (Hymenoptera: Eulophidae). Foram realizados tr?s experimentos em laborat?rio. No primeiro, avaliou-se a seletividade dos herbicidas atrazine e nicosulfuron e a mistura destes, e mais o controle (?gua), aplicados em posturas e em diferentes est?dios biol?gicos de P. nigrispinus. A viabilidade dos ovos de P. nigrispinus diminuiu sob a??o dos herbicidas, sem diferirem quanto ao tempo de eclos?o. A sobreviv?ncia de ninfas foi baixa sob a??o dos herbicidas, sendo mais afetada negativamente com a mistura de herbicidas. Para a aplica??o em cada est?dio, observou-se baixa sobreviv?ncia de ninfas do primeiro ao terceiro est?dios com o herbicida atrazine isolado, ou em mistura, e at? o segundo est?dio para o nicosulfuron. Observou-se em todos os demais est?dios do inseto a menor seletividade ? mistura dos herbicidas comparados ao efeito isolado. O segundo experimento avaliou-se a seletividade de herbicidas registrados para a cultura do milho para o inimigo natural P. elaeisis. Os tratamentos foram pupas do hospedeiro alternativo Tenebrio molitor Linnaeus, 1758 (Coleoptera: Tenebrionidae) pulverizadas com os herbicidas atrazine, nicosulfuron, paraquat e tembotrione, na dose comercial, mais o tratamento controle com ?gua. Pupas de T. molitor foram submergidas em solu??o herbicida e logo ap?s, expostas ao parasitismo por seis f?meas de P. elaeisis. Os herbicidas atrazine e paraquat n?o foram seletivos a P. elaeisis, apresentando elevada toxicidade. J? o herbicida nicosulfuron reduziu a raz?o sexual de P. elaeisis, o que pode comprometer as gera??es subsequentes. O herbicida tembotrione foi seletivo a P. elaeisis apresentando menor risco quando indicado em programas de manejo integrado de insetos. No terceiro experimento avaliou-se a seletividade de herbicidas usados na cultura do eucalipto no parasitoide P. elaeisis. Os tratamentos constaram das doses comerciais dos herbicidas sulfentrazone, oxyfluorfen, glyphosate, glufosinato sal de am?nio e isoxaflutole, al?m do controle, apenas com ?gua. Os herbicidas foram aspergidos em pupas do hospedeiro alternativo T. molitor, as quais foram expostas ao parasitismo por seis f?meas de P. elaeisis. Os herbicidas glufosinato sal de am?nio e oxyfluorfen n?o foram seletivos ?s f?meas de P. elaeisis, e reduziram o parasitismo e a emerg?ncia desse parasitoide. O n?mero de indiv?duos e f?meas produzidas por f?mea foram maiores com isoxaflutole, portanto apresentando menor risco quando utilizado em programas de manejo integrado de pragas na cultura do eucalipto. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2012. / ABSTRACT The management of weeds in agricultural crops is necessary to avoid competition and yield losses. Herbicide use is common in weed control, and can negatively impact the environment. The aim of this study was to evaluate the toxicity of herbicides applied on corn [Zea mays L. (Poaceae)] and eucalyptus [Eucalyptus sp. (Myrtaceae)] on the Podisus nigrispinus Dallas, 1851 (Heteroptera Pentatomidae) and Palmistichus elaeisis Delvare & LaSalle, 1993 (Hymenoptera: Eulophidae). Three experiments were conducted in the laboratory. At first, we evaluated the selectivity of the herbicides atrazine and nicosulfuron and mixture, in commercial dosage, applied in different postures and biological stages of P. nigrispinus. The viability of eggs of P. nigrispinus decreased under the action of herbicides, without differences regarding the time of hatching. The survival of nymphs was low in the herbicides being more adversely affected with the herbicide mixture. For the application at each stage there was low survival of nymphs of the first to third stage with the herbicide atrazine, alone or in mixture until the second stage to nicosulfuron. It was observed in all other stages of the insect to lower selectivity compared to the herbicide mixture to the isolated effect. The second chapter assessed the selectivity of herbicides registered for corn for the natural enemy of P. elaeisis. The treatments were pupae of the alternative host Tenebrio molitor Linnaeus, 1758 (Coleoptera: Tenebrionidae) sprayed with the herbicide atrazine, nicosulfuron, paraquat and tembotrione in commercial dosage over the control treatment with water. Pupae of T. molitor were overwhelmed with the solution herbicidica and soon after exposed to parasitism by six females of P. elaeisis. The herbicides atrazine and paraquat were not selective to P. elaeisis, with high toxicity. The herbicide nicosulfuron reduced the sex ratio of P. elaeisis, which may affect subsequent generations. The herbicide tembotrione was selective to P. elaeisis and can be displayed in integrated pest management of insects. In the third chapter we evaluated the selectivity of herbicides used in the cultivation of eucalyptus, to the parasitoid, P. elaeisis. The treatments consisted of doses of commercial herbicides sulfentrazone, oxyfluorfen, glyphosate, glufosinate ammonium salt and isoxaflutole, beyond control, with water only. The herbicides were sprayed in pupae of the alternative host T. molitor, which were exposed to six female parasitism by P. elaeisis. The herbicide glufosinate ammonium salt and oxyfluorfen were not selective in females of P. elaeisis, and reduced parasitism and emergence of this parasitoid. The number of individuals and females produced per female were higher with glyphosate and isoxaflutole and can be used in programs of Integrated Pest Management (IPM) in the culture of eucalyptus.
30

Avalia??o de produ??o e florescimento de cultivares de cenoura em duas regi?es distintas do Alto Vale do Jequitinhonha, MG. / Carrot yielding and flowering on two jequitinhonha valley sites.

Pereira, Gustavo Ant?nio Mendes 28 February 2013 (has links)
Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T13:30:36Z No. of bitstreams: 5 52.pdf: 535664 bytes, checksum: 9804322a513635d7cf36650e1314a803 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T19:21:15Z (GMT) No. of bitstreams: 5 52.pdf: 535664 bytes, checksum: 9804322a513635d7cf36650e1314a803 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Made available in DSpace on 2015-02-27T19:21:15Z (GMT). No. of bitstreams: 5 52.pdf: 535664 bytes, checksum: 9804322a513635d7cf36650e1314a803 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) Previous issue date: 2013 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes) / Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG) / O sucesso na explora??o comercial de ra?zes de cenoura depende da escolha de cultivares com boa adapta??o ?s condi??es ed?ficas e clim?ticas no local onde ser? cultivada e com boa aceita??o pelo mercado consumidor. O objetivo do presente trabalho foi avaliar o desempenho de cultivares de cenoura no cultivo de outono-inverno em dois munic?pios com caracter?sticas edafo-clim?ticas distintas do Alto Vale do Jequitinhonha, MG. Os experimentos foram conduzidos na Fazenda Rio Manso, munic?pio de Couto de Magalh?es de Minas, MG e no Campus JK, munic?pio de Diamantina, MG. Foram avaliadas seis cultivares de cenoura (Bras?lia, Nantes, Kuronan, Esplanada, Planalto e Tornado) num delineamento experimental em blocos ao acaso com tr?s repeti??es. Para a evolu??o do crescimento, a partir do dia do desbaste (35 dias ap?s semeadura), at? o dia da colheita (100 dias ap?s semeadura), foram avaliadas semanalmente as seguintes caracter?sticas: altura da parte a?rea, comprimento de raiz, massa seca de raiz, massa seca total, ?ndice de colheita e produtividade total. Estas mesmas caracter?sticas, acrescidas da produ??o comercial, foram consideradas para representarem a produ??o final. As cultivares que se destacaram foram Planalto, Tornado e Kuronan em Couto de Magalh?es de Minas e Planalto em Diamantina. O desempenho agron?mico das cultivares foi superior em Couto de Magalh?es de Minas para a maioria das vari?veis avaliadas, resultando em uma maior produtividade total e comercial de ra?zes. As condi??es edafo-clim?ticas de Diamantina provocam indu??o de florescimento na maioria das cultivares, causando perdas de produtividade comercial no cultivo de outono-inverno. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2013. / ABSTRACT Growing and trading carrots depends upon choosing cultivars with good adaptability on the region where they grow and good acceptance by the consumers. This work aimed to evaluate the performance of autumn-winter carrot cultivars growing in two diverse regions on Jequitinhonha Valley: Fazenda Rio Manso ? UFVJM, in Couto de Magalh?es de Minas and Campus II ? UFVJM, in Diamantina. Six cultivars (Bras?lia, Nantes, Kuronan, Esplanada, Planalto e Tornado) were evaluated in a randomized block design with three replications. The evaluations were carried out weekly from 35th up to 100th day after sowing, on the traits: plant height; root length; weight of dry roots; total dry weight; harvest index; and total yielding. These traits, plus the commercial weight, were evaluated after harvest (at the 100th day). The cultivars Planalto, Tornado and Kuronan had the best performance In Couto de Magalh?es while in Diamantina only Planalto exceeded. Couto de Magalh?es showed better performance than Diamantina for any cultivar in almost all evaluated traits. Early flowering on most of the cultivars in Diamantina resulted in a significant loss of commercial weight, supposedly as a consequence of its low temperature.

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