Freie Universiẗat, Diss., 2005--Berlin. / Dateiformat: zip, Dateien im PDF-Format. Erscheinungsjahr an der Haupttitelstelle: 2005.

In recent years, there has been a concern for the amount of carbon dioxide released into the atmosphere and how it will be captured. One way to capture carbon dioxide is with algae. In this study, algae's growth was measured at different temperatures. The first part of the study was to grow Scenedesmus and Chlorella with M8 or urea growth media at a temperature of 25, 30 or 35ºC. It was found that 30ºC had the best growth rates for both algae. The second part studied Scenedesmus growth with urea, more in-depth, and found the optimum growth temperature to be 27.5ºC with a growth rate of 0.29 1/hr. The last part of the study was a heat transfer model which predicted the temperature of a greenhouse and an outdoor unit. The model could also predict the growth rate of the algae and the temperature if flue gas is mixed in with the algae.

Submitted by Ana Paula Russo Schimidt Jefery (schimidt.ana@gmail.com) on 2018-06-07T12:13:39Z No. of bitstreams: 1 Tese Ana Paula Russo Schimidt Jefery.pdf: 1747996 bytes, checksum: e0875cc17829cdad5bcb572b43720a4d (MD5) / Approved for entry into archive by Maria Lucia Martins Frederico null (mlucia@fca.unesp.br) on 2018-06-07T12:21:24Z (GMT) No. of bitstreams: 1 jefery_aprs_dr_botfca.pdf: 1601762 bytes, checksum: f093397ad05508e789eca1216cb098a9 (MD5) / Made available in DSpace on 2018-06-07T12:21:24Z (GMT). No. of bitstreams: 1 jefery_aprs_dr_botfca.pdf: 1601762 bytes, checksum: f093397ad05508e789eca1216cb098a9 (MD5) Previous issue date: 2018-01-15 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / O setor agrícola é o maior usuário dos recursos hídricos uma vez que a água é um elemento essencial para o cultivo de qualquer espécie vegetal. A necessidade crescente de produção de alimentos, fibras e energia tem fortalecido o uso das técnicas de irrigação no Brasil e no mundo. Para que se possa usufruir dos vários benefícios que a irrigação pode proporcionar, é importante o conhecimento da relação entre a quantidade de água aplicada aos cultivos e a produção obtida. Essa relação pode ser expressa através uma função matemática denominada função de produção, que é uma importante ferramenta de análise e tomada de decisão, mas a obtenção das funções de produção envolve experimentos de campo, caracterizando-se por ser um processo demorado e oneroso. O objetivo deste trabalho foi elaborar um modelo de transformação de funções de produção água-cultura obtidas em condições experimentais para determinada cultura e local, para ser utilizada pela mesma cultura em outra região com condições distintas da região original, desde que se conheça a lâmina de água correspondente a 100% da evapotranspiração da cultura, e a respectiva produtividade. O modelo de transformação desenvolvido e as funções de produção obtidas na literatura foram aplicados a dados coletados de lâmina total aplicada e produtividade em localidades no estado de São Paulo para as culturas de feijão e milho visando a avaliação do ajuste fornecido. Concluiu-se que as funções de produção da literatura tenderam a superestimar as estimativas, enquanto as funções transformadas minimizaram a variação dos dados, fornecendo ajuste adequado com os dados reais em praticamente todas os locais avaliados, tanto para a cultura do feijão como para a cultura do milho. / Agriculture is the main user of water resources because water is essential for any crop growing. The demand for food, fiber and energy production is increasing and has strengthened the use of irrigation techniques in Brazil and worldwide. In order to be able to take advantage of the benefits that irrigation can provide, it is worth to know the relationship between the water depth applied to the crops and the yield obtained. This relationship can be expressed through a mathematical function called production function, being an important tool of analysis and decision making. Obtaining the production functions involve field experiments, characterized as a time-consuming and costly process. The objective was to elaborate a mathematical model to generate a water-culture production functions obtained under experimental conditions for a given crop and place, to be used by the same crop in another region with different conditions of the original region, provided that at least one pair of water blade data corresponding to 100% crop evapotranspiration and productivity. The transformation model developed and production functions obtained in the literature were applied to data collected from productivity / total blade applied in some farms of São Paulo State, for bean and corn crops. We concluded that the production functions of the literature tended to overestimate the values, whereas the transformed functions minimized the variation of the data, providing adequate adjustment with the real data in practically all evaluated farms, both for the bean and corn crops.

Acne Vulgaris is a common dermatological condition defined as a chronic inflammatory dermatosis of the pilosebaceous unit that affects more than 17 million Americans.^1 Although it is not considered a dangerous condition, it may drastically impair quality of life and leave a substantial psychological impact.^2 Acne’s multifactorial pathogenesis is typically categorized into four aspects: increased sebum production, altered keratinization, inflammation, and bacterial colonization.^3 Dietary factors contribution to the pathogenesis of acne has remained controversial throughout the literature. However, currently there exists a greater understanding between how diet may influence endocrine factors contributing to acne pathogenesis.^4 Additionally, recent published evidence and public paradigm shifts highlighting the relationship between diet and health have caused a resurgence of this topic, particularly among patients seeking a more gentle, alternate solution to current treatments. Some of the most promising recent correlating evidence supports an association between acne prevalence and dairy consumption, particularly skim milk consumption.^5 It is hypothesized that milk consumption affects the presence of both reproductive, non-reproductive hormones, and growth factors in our body, which may contribute to increased acne prevalence.^6 However, there has been a lack of randomized controlled trials to determine the cause and effects nature of this relationship, as all previous studies are observational.^1 Therefore, this study will conduct a randomized controlled trial to determine the significance between dietary non-fermented dairy consumption and acne prevalence in adolescents. We hypothesize the adaptation of a diet of decreased dairy consumption will decrease the prevalence or severity of acne vulgaris in adolescents between the ages of 13-18. It is our hope that the conclusion of this study will advance our understanding of the dietary correlation between dairy and acne vulgaris in order to provide further insight to guide medical practitioners’ ability to help treat this distressing condition.

?rea de concentra??o: Produ??o Vegetal / Submitted by M?rden L?les (marden.inacio@ufvjm.edu.br) on 2016-07-26T19:46:56Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Marcos_ Ant?nio_ da_ Silveira_ J?nior.pdf: 1864492 bytes, checksum: 8855c38c294d410e078b2af072e73b63 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2016-07-27T11:57:55Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Marcos_ Ant?nio_ da_ Silveira_ J?nior.pdf: 1864492 bytes, checksum: 8855c38c294d410e078b2af072e73b63 (MD5) / Made available in DSpace on 2016-07-27T11:57:55Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Marcos_ Ant?nio_ da_ Silveira_ J?nior.pdf: 1864492 bytes, checksum: 8855c38c294d410e078b2af072e73b63 (MD5) Previous issue date: 2015 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / A produtividade m?dia das culturas aliment?cias ? considerada baixa e entre os fatores que mais impactam nessas perdas est? a competi??o com plantas daninhas. Nesse contexto, foram conduzidos tr?s experimentos com os objetivos de: a) determinar os efeitos da competi??o de capim marmelada (Urochloa plantaginea) e pic?o-preto (Bidens pilosa) em diferentes arranjos e densidades no crescimento das culturas do milho, do feijoeiro e da mandioca; b) quantificar a interfer?ncia e o efeito da associa??o do pic?o-preto e do capim marmelada no desenvolvimento da cultura, bem como o efeito da competi??o nas plantas daninhas e c) avaliar a interfer?ncia de pic?o-preto e capim marmelada em lavouras de feij?o, bem como seu efeito em diferentes doses de fertilizantes. No primeiro experimento constatou-se que o incremento da densidade de plantas daninhas afeta negativamente o crescimento das culturas, especialmente as culturas do feijoeiro e da mandioca. Nas parcelas onde o pic?o-preto se encontrava presente as plantas cultivadas mostram maior sensibilidade ? competi??o em rela??o ?s parcelas onde a capim marmelada se encontrava presente. No segundo trabalho observou-se que o pic?o-preto exerce maior competi??o sofre o feijoeiro do que o capim marmelada. A associa??o das duas esp?cies daninhas mostrou tend?ncia de ser mais danosa, do que quando associadas, ao crescimento da cultura do feijoeiro. No terceiro trabalho, o efeito da competi??o entre cultura e plantas daninhas promoveu perdas no desenvolvimento do feijoeiro, que s?o agravadas pela redu??o da quantidade de adubo presente no substrato, destacando-se que os efeitos s?o mais quando ? utilizada a dose recomendada dos fertilizantes. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2015. / ABSTRACT The average productivity of food crops is considered low and among the factors that impact these losses is the competition with weeds. In this context, three experiments were performed with the following objectives: a) to determine the effects of marmalade grass competition (Urochloa plantaginea) and beggarticks (Bidens pilosa) in different arrangements and densities in the growth of the corn, bean and cassava crops; b) quantify the interference and the association effect of beggarticks and marmalade grass in the development of culture as well as the effect of competition in the weeds and c) evaluate the interference of beggarticks and marmalade grass in bean crops, as well their effect at different doses of fertilizers. In the first experiment it was found that the increase in weed density negatively affect the growth of crops, especially crops of beans and cassava. In plots where the beggartick was present cultivated plants show greater sensitivity to the competition in relation to the portions where the jam grass was present. In the second study it was observed that beggarticks exerts greater competition suffers the bean that marmalade grass. The combination of the two weed species tended to be more damaging than when associated to the growth of the bean crop. In the third paper, the effect of competition between crop and weeds promoted losses in the development of the bean, which are compounded by reducing the amount of fertilizer present in the substrate, highlighting that the effects are more when the recommended dose of fertilizer is used.

Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2017-04-03T20:28:05Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) ana_flavia_freitas.pdf: 1136034 bytes, checksum: 965afc88d55a61d59101bffaca9ad367 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2017-04-24T16:56:16Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) ana_flavia_freitas.pdf: 1136034 bytes, checksum: 965afc88d55a61d59101bffaca9ad367 (MD5) / Made available in DSpace on 2017-04-24T16:56:16Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) ana_flavia_freitas.pdf: 1136034 bytes, checksum: 965afc88d55a61d59101bffaca9ad367 (MD5) Previous issue date: 2016 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq.) / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM) / Consider?vel redu??o na produtividade de culturas e consequente perda financeira resultam da competi??o com plantas daninhas. Essas perdas s?o muito estudadas e disponibilizadas na literatura, por meio da rela??o dos per?odos de controle. Contudo, mesmo ap?s amplos estudos sobre per?odos, as divulga??es recentes sobre a teoria do ?inicialismo?, pouco se sabe sobre o momento inicial da interfer?ncia radicular entre plantas, principalmente devido a dificuldades na visualiza??o dos eventos iniciais. Dessa forma, objetivou-se estimar a partir da semeadura em rizotrons, os primeiros sinais que levariam ? interfer?ncia entre sistemas radiculares. Foram realizados dois experimentos em casa de vegeta??o: No primeiro, os tratamentos foram arranjados em esquema fatorial 3x2, sendo, 3 esquemas de cultivo do feijoeiro (solteiro, com uma e com duas plantas de braqui?ria) com e sem aduba??o fosfatada, conduzido em um delineamento inteiramente casualizado com 4 repeti??es. Ap?s a semeadura das esp?cies, os resultados da visualiza??o foram registrados a cada 12 horas, por meio de fotografias do desenvolvimento do sistema radicular. O sistema de ra?zes do feijoeiro apresentou maior comprimento e ?rea radicular quando em defici?ncia de f?sforo e presen?a de duas braqui?rias. O segundo experimento foi arranjado em esquema fatorial 2x2, sendo cultivo do milho solteiro ou com uma planta de braqui?ria e pela submiss?o ou n?o do substrato ? esteriliza??o, conduzido em um delineamento inteiramente casualizado com 4 repeti??es. Foi observado maior comprimento radicular das pl?ntulas de milho, quando em presen?a da braqui?ria, por?m, sem efeito quanto ? esteriliza??o do substrato. Verificaram-se varia??es no ac?mulo de N, Mn, K, Ca e P, al?m da redu??o em altura, n?mero de folhas e mat?ria seca do milho em fun??o da esteriliza??o do substrato. As culturas como feij?o e milho s?o influenciadas quando est?o submetidas ? interfer?ncia da Urochloa brizantha antes da emerg?ncia. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2016. / Considerable reduction in crop productivity and consequent financial loss result from competition with weeds. These losses are widely studied and made available in the literature by listing the control periods. However, even after extensive studies on periods and the recent disclosures about the ?initialism? theory, little is known about the initial moment of root interference between plants, especially due to difficulties in the visualization of the initial events. In this sense, the objective was to estimate, sowing in a rhyzotron, the first signals that would take to interference between root systems. Two experiments were conducted in a greenhouse: In the first, treatments were arranged in a 3x2 factorial arrangement, with three beans cultivation schemes (single, with one and with two Brachiaria plants) with and without P fertilization, conducted in a completely randomized design, with four replications. After sowing the species, visualization results were recorded every 12 hours by means of photographs of the development of the root system. The bean root system showed greater length and root area when under phosphorus deficiency and in the presence of two Brachiaria plants. The second experiment was arranged in a 2x2 factorial design, with cultivation of maize single or with one Brachiaria plant, and by the submission or not of the substrate to sterilization, in a completely randomized design, with four replications. After sowing the species, visualization results were recorded every 12 hours by means of photographs of the development of the root system. It was observed higher root length in maize seedlings when in the presence of Brachiaria, however, no effect of substrate sterilization. There were variations in the accumulation of N, Mn, K, Ca and P, and decreases in height, number of leaves and maize dry matter as a function of the substrate sterilization. Crops as bean and maize are influenced when subjected to interference of Urochloa brizantha before emergency.

Milk fat is one of the most important components of goat milk. Another benefit of goat milk fat is its better digestibility in comparison with cow milk, which is caused by the smaller size of lipid micelles. Goat milk fat contains more lower fatty acids (caproic, caprylic and capric), which affect the production and processing of milk and cause specific flavor of goat's milk and dairy products. In recent years, the subject of many studies the possibility of increasing the content of other health beneficial fatty acids in goat milk, such as conjugated linoleic acid (CLA) and omega-3 and omega-6 polyunsaturated fatty acids. Animal nutrition is a significant factor how to achieve these changes in the fatty acid profile of milk fat. For these purposes can be used as additives for certain species of algae which are the source of nutritionally valuable lipids with a high content of polyene fatty acids, especially omega-3 and omega-6 fatty acids. The ability to change the composition of goat mikl fat, represents an opportunity for the development of new products. Functional foods, such as milk and dairy products enriched with omega-3 and omega-6 fatty acids. The aim of this work is to determine what effect the addition of selected algae (Chlorella vulgaris and Japanochytrium sp.) On milk production and representation of the components of milk, focusing on the composition of milk fat and fatty acid profile in goat milk. Attention was paid to reduction of saturated and increase the proportion of nutritionally beneficial unsaturated fatty acids, in particular n-3 polyunsaturated fatty acids.

A poluição ambiental é atualmente um sério problema mundial. Diferentes poluentes são amplamente distribuídos no planeta, o que contribui para a elevação da exposição de animais e vegetais a diversos elementos tóxicos, aumentando a preocupação com relação aos efeitos adversos que os poluentes exercem sobre a saúde humana e ao ambiente. Os metais pesados e os poluentes do ar, como o ozônio, representam os principais contaminantes urbanos e industriais de solo, corpos de água, animais e plantas. O principal mecanismo responsável pela fitotoxicidade tanto dos metais pesados como do ozônio é o aumento nos níveis de espécies ativas de oxigênio que a presença desses poluentes gera. No presente trabalho a exposição controlada de diferentes cultivares de Phaseolus vulgaris a ozônio revelou que a diferença de sensibilidade entre as cultivares está associada à capacidade de aumentar a atividade da catalase, evitando a geração de danos oxidativos aos lipídios no tecido foliar. A exposição de propágulos de Avicennia marina a Zinco alterou o status oxidativo das plantas, aumentando a atividade da glutationa peroxidase e os níveis de lipoperoxidação. Em campo, observou-se que apenas a atividade da mesma enzima teve correlação com os níveis de metais foliares (Zinco, Cobre e Chumbo), sugerindo a utilidade da atividade dessa enzima em estudos de bioindicação. / Environmental pollution is a worldwide problem. Different pollutants are widely distributed on the planet, increasing the exposure of animals and plants to various toxic compounds which increases the concern about the adverse effects to human and environment health. Heavy metals and air pollutants, such as ozone, are the major contaminants of urban and industrial soil, water, animals and plants. The main mechanism responsible for metals and ozone phytotoxicity is the increased generation of reactive oxygen species. In the present study the controlled exposure of different Phaseolus vulgaris to ozone revealed that the difference on the varieties' sensitivity is associated with the capacity of increasing catalase activity, thus avoiding oxidative damage to lipids. The exposure of Avicennia marina seedlings to Zinc changed the oxidative status of these plants, which increased activity of glutathione peroxidase and levels of lipid peroxidation. Under field conditions, we observed that glutathione peroxidase activity was correlated with the levels of leaf metals (Zinc, Copper and Lead), suggesting the utility of this enzyme activity for bioindication purposes.

Submitted by Reginaldo Soares de Freitas (reginaldo.freitas@ufv.br) on 2017-04-26T17:01:55Z No. of bitstreams: 1 texto completo.pdf: 199172 bytes, checksum: 830fdbba905593d2a207ee91986a954c (MD5) / Made available in DSpace on 2017-04-26T17:01:55Z (GMT). No. of bitstreams: 1 texto completo.pdf: 199172 bytes, checksum: 830fdbba905593d2a207ee91986a954c (MD5) Previous issue date: 2000-09-21 / Conselho Nacional de Desenvolvimento Científico e Tecnológico / Foram instalados três ensaios: um em Coimbra e dois em Viçosa, MG, todos conduzidos em delineamento de blocos ao acaso, com quatro repetições. O primeiro experimento, conduzido em Coimbra no verão-outono, compreendeu um fatorial 13x2, ou seja, 13 cvs. de feijão (Aporé, Carioca, Diacol Calima, Diamante Negro, MA-733 327, Manteigão Fosco, Meia Noite, Milionário, Ouro, Ouro Branco, Ouro Negro, Pérola e Rudá) pulverizados ou não com a Calda Viçosa. Esta foi modificada para 3 g L–1 de sulfato de Zn, 4 g L–1 de sulfato de Mg, 5 g L–1 de sulfato de Cu, 4 g L–1 de KCl, 80 g ha –1 de Mo e 3 g L–1 de cal hidratada. A calda com o Mo foi aplicada três vezes: aos 31, 38 e 56 dias após a emergência (DAE), com modesto controle da mancha-angular. Concluiu-se que o Mo não influenciou significativamente as produtividades dos cvs., provavelmente porque sua dose total foi superior a 200 g ha–1. O Diacol Calima foi o cv. mais produtivo (1.877 kg ha–1), diferindo significativamente no tratamento, sem Calda Viçosa, dos cultivares Meia Noite, Pérola, Carioca e Rudá e apenas do cultivar Rudá no tratamento com calda. O segundo ensaio, conduzido na primavera-verão em Viçosa, compreendeu um fatorial 7x3, ou seja, os cvs. Aporé, Diacol Calima, Diamante Negro, MA-733 327, Meia Noite, Ouro e Pérola, os quais receberam três tratamentos: a aplicação da calda Viça-café (5,0 kg ha–1), a aplicação do tiofanato metílico (1.000 g ha–1 do produto comercial “Cercobin”) e a testemunha. Nessa calda, foi adicionado o Mo (o correspondente a 80 g ha–1), que fez parte apenas da primeira aplicação. O fungicida e a calda foram aplicados aos 27, 36 e 54 DAE. Verificou-se que a calda e o fungicida não diminuíram a intensidade da mancha-angular e da ferrugem, mas a calda trouxe aumentos de rendimento que variaram de 108% a 210%. O terceiro experimento, conduzido no outono-inverno, à semelhança do segundo, diferiu apenas quanto à presença do cv. Carioca, na aplicação dos fungicidas tebuconazole (750 ml ha–1 de Folicur) e fluazinam (500 ml ha–1 de Fronwcide) e na aplicação via foliar de 60 g ha–1 de Mo aos 28 DAE em todas as parcelas do experimento. Os fungicidas foram aplicados aos 66 DAE, ao passo que a calda o foi aos 30, 63 e 70 DAE. Constatou-se que apenas o fluazinam agiu contra o mofo-branco e a calda não teve nenhum efeito sobre a mancha-angular. / Three experiments were carried out, one in Coimbra and two in Viçosa, state of Minas Gerais. They were installed in a randomized complete block design with four replication. The first experiment, conducted in Coimbra in the summer-fall, using a factorial 13x2 having 13 cvs. of bean (Aporé, Carioca, Diacol Calima, Diamante Negro, MA 733 327, Manteigão Fosco, Meia Noite, Milionário, Ouro, Ouro Branco, Ouro Negro, Pérola e Rudá) sprayed with calda Viçosa. This was modified to receive 3 g L–1 of sulfate of Zn, 4 g L–1 of sulfate of Mg, 5 g L–1 of sulfate of Cu, 4 g L–1 of KCl, 80 g ha–1 of Mo and 3 g L–1 of lime. The calda Viçosa with Mo was applied three times: 31, 38 and 56 days after plant emergency (DAE), provoking modest control of the angular leaf spot. The results showed that Mo did not influence the productivity of the cvs significantly, probably. because of the high doses used (200 g ha–1). Diacol Calima had the highest yield (1.877 kg ha–1), differing significantly in the treatment without calda Viçosa, (cvs. Meia Noite, Pérola, Carioca e Rudá) and only cv. Rudá in treatment with calda. In the second trial, carried out during spring-summer, in Viçosa. A factorial of 7x3 was: cvs. Aporé, Diacol Calima, Diamante Negro, MA-733 327, Meia Noite, Ouro and Pérola, which received three treatment: the application of the mixture “Viça-café” (5,0 kg ha–1), the application of the methilic thiophanate (1.000 g ha–1 of commercial product “Cercobin”) and the witness. In this mixture it was added Mo (80 g ha–1), that was just part of the first application. The fungicide and the mixture were applied at the 27, 36 and 54 (DAE). It was verified that the mixture and the fungicide did not decrease the intensity of the angular leaf spot and the rust, but the mixture application increased the productivity, that varied 108% to 210%. Carried out in the fall- winter, this third experiment, similar to the second, just differed in the presence of the cv. Carioca, in the application of the fungicides tebuconazole (750 ml ha–1 of commercial product “Folicur”) and fluazinam (500 ml ha–1 of commercial product “Fronwcide”) and in the foliar application of 60 g ha–1 of Mo at the 28 (DAE) in whole the portions of the experiment. The fungicides were applied to 66 DAE and the mixture at the 30, 63 and 70 (DAE). The was concluded that just fluazinam acted against the white mold and the mixture had no effect on the angular leaf spot. / Não foram localizados o cpf e o currículo lattes do autor.

Submitted by Reginaldo Soares de Freitas (reginaldo.freitas@ufv.br) on 2017-04-27T17:27:56Z No. of bitstreams: 1 texto completo.pdf: 107213 bytes, checksum: cf8c1b9d3a5da16efce84e99d13a1800 (MD5) / Made available in DSpace on 2017-04-27T17:27:56Z (GMT). No. of bitstreams: 1 texto completo.pdf: 107213 bytes, checksum: cf8c1b9d3a5da16efce84e99d13a1800 (MD5) Previous issue date: 2001-04-27 / Conselho Nacional de Desenvolvimento Científico e Tecnológico / Foram conduzidos um experimento em Viçosa e dois em Coimbra, municípios de Zona da Mata de Minas Gerais, objetivando avaliar a aceitação sensorial das folhas verdes de feijão (Phaseolus vulgaris L.) e avaliar os efeitos da adubação nitrogenada em cultivares de feijão submetidos a 33% de desfolhamento. Procurou-se ainda avaliar os efeitos de níveis e épocas de desfolhamento sobre a produção do feijoeiro. Usou-se sempre o delineamento experimental de blocos ao acaso, com quatro repetições. No primeiro experimento, realizado em Viçosa, foram utilizados seis cultivares para realizações dos testes sensoriais e obtenção das produções de folhas verdes. No segundo experimento, conduzido em Coimbra, estudaram-se os efeitos da adubação nitrogenada nos cultivares Ouro Negro e Pérola, os quais foram submetidos a 33% de desfolhamento, nos estádios de desenvolvimento entre floração e formação de vagens. No terceiro experimento, em Coimbra, estudaram-se os efeitos de quatro níveis de desfolhamento (0, 33, 66 e 100%) combinados com quatro épocas de desfolhamento (25, 40, 55 e 70 dias após emergência), no cultivar Ouro Negro. Pelos resultados obtidos concluiu-se que: 1) as folhas verdes da maioria dos feijões têm aceitação semelhante às da couve; 2) os cultivares de feijão podem produzir de 0,5 a 1,5 t/ha de folhas verdes, com 33% de desfolhamento; 3) a composição química das folhas de feijão assemelha-se à das de couve, porém as folhas de feijão apresentam maior teor de fibra e menor teor de proteína; 4) a adubação nitrogenada proporciona maiores produções de folhas verdes, proteínas e grãos, nos cultivares Pérola e, principalmente, no Ouro Negro; e 5) para não prejudicar a produção de grãos, a melhor época para os desfolhamentos é antes do florescimento. / One experiment was carried out in Viçosa and two in Coimbra, Zona da Mata, Minas Gerais, to evaluate the sensorial acceptance of green leaves of the common bean (Phaseolus vulgaris L.) and the effects of nitrogenated fertilization in bean cultivars submitted to 33% defoliation. The effects of defoliation levels and periods on the bean plant were also evaluated. The experiments were arranged in a randomized block design, with four repetitions. For the first experiment, conducted in Viçosa, six cultivars were used to carry out sensorial tests and to obtain green leaf productions. In the second experiment, conducted in Coimbra, the effects of nitrogenated fertilization on the cultivars Ouro Negro and Pérola were studied, with these cultivars being submitted to 33% defoliation, under the development stages between flowering and pod formation. In the third experiment, also in Coimbra, the effects of four defoliation levels (0, 33, 66 and 100%) combined with four defoliation periods (25, 40, 55 and 70 days after emergence), on the cultivar Ouro Negro were studied. It was concluded that: 1) the green leaves of most beans had a sensorial acceptance similar to that obtained by collard greens; 2) the bean cultivars can yield from 0.5 to 1.5 t/ha green leaves, with 33% defoliation; 3) the chemical composition of the bean leaves is similar to that of collard green leaves; however, bean leaves have a higher content of fiber and lower protein content; 4) nitrogenated fertilization provides higher yields of green leaves, proteins and grains, in the cultivar Pérola and, especially, in the cultivar Ouro Preto; and 5) so as not to harm grain production, the best period for defoliation is before flowering. / Não foram localizados o cpf e o currículo lattes do autor.