Thesis (Ph. D.)--University of Wisconsin--Madison, 1970. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliography.

Thesis (Ph.D.)--University of Nebraska-Lincoln, 2006. / Title from title screen (site viewed on September 12, 2006). PDF text of dissertation: viii, 203 p. : ill., ports ; 3.93Mb. UMI publication number: AAT 3208049. Includes bibliographical references. Also available in microfilm, microfiche and paper format.

Submitted by Reginaldo Soares de Freitas (reginaldo.freitas@ufv.br) on 2017-04-26T11:39:24Z No. of bitstreams: 1 texto completo.pdf: 635725 bytes, checksum: 0c8e78027a47044c787419449019c1ee (MD5) / Made available in DSpace on 2017-04-26T11:39:24Z (GMT). No. of bitstreams: 1 texto completo.pdf: 635725 bytes, checksum: 0c8e78027a47044c787419449019c1ee (MD5) Previous issue date: 2000-12-21 / Fondo Nacional de Investigaciones Agropecuarias / Com o objetivo de avaliar o efeito do pré-enraizamento e dos tipos de mudas sobre o crescimento de planta e a produção de raízes dos clones de batata-baroa, ‘Amarela de Carandaí’ (BGH 5746) e ‘Roxa de Viçosa’ (BGH 6513), provenientes do Banco de Germoplasma de Hortaliças da Universidade Federal de Viçosa, foram conduzidos três experimentos. Dois experimentos foram conduzidos com o clone ‘Roxa de Viçosa’: o primeiro (época primavera-primavera) instalado em 4 de dezembro de 1998 e concluído em novembro de 1999 e o segundo (época outono-outono) instalado em 9 de abril de 1999 e concluído em fevereiro de 2000. O terceiro experimento foi conduzido na mesma época do segundo, porém com o clone ‘Amarela de Carandaí’. Os experimentos consistiram de dez tratamentos, dispostos em blocos casualizados, em parcelas subdivididas, com cinco repetições. Nas parcelas foram usados dois métodos de plantio (com e sem pré-enraizamento das mudas) e nas subparcelas, cinco tipos de mudas (1- ápice do rebento com ± 2,7 cm de comprimento, com corte em bisel na base; 2- segmento intermediário do rebento, com ± 4,9 cm de comprimento, com cortes em bisel nas extremidades; 3- idem ao tipo 2, com ± 4,7 cm de comprimento, com corte longitudinal na parte côncava, correspondente a um quarto do diâmetro da muda; 4- rebento inteiro, com ± 5,74 cm de comprimento, com cortes em bisel na base e longitudinal na parte côncava; e 5- idem ao tipo 4, com ± 6,3 cm de comprimento, com corte em bisel na base). Foram avaliados: porcentagem de plantas emergidas, número de brotações por planta, número de folhas na brotação principal e altura de planta em pré-transplante (campo e canteiro de pré-enraizamento), além da população de plantas aos 65, 150, 210 e 270 dias após o transplante. Na colheita, foram avaliados: população final, altura e diâmetro de copa da planta, peso total de matéria fresca da planta, número e peso de rebentos por planta, número de folhas por rebento, número, comprimento, diâmetro e peso de massa fresca de classes de raízes tuberosas, comprimento, diâmetro e peso de massa fresca da coroa e rendimento (kg ha-1) de raízes comerciais. As análises de variância e os testes de médias (Tukey 5%) indicaram que nos clones e nas épocas de cultivo o método de plantio de mudas sem pré-enraizamento, independentemente do tipo de muda, proporcionou maior crescimento e produção de raízes por planta e de raízes comerciais que o método com pré-enraizamento. A época de cultivo influenciou o desempenho das plantas no campo, em especial afetando as mudas pré-enraizadas. A melhor época de cultivo nos dois clones foi outono- outono. Não houve efeito de tipo de muda, isoladamente, sobre as características avaliadas. / Aiming to evaluate the effect of pre-rooting and the types of seedlings upon plant growth and root yield of the peruvian carrots clones ‘Amarela de Carandaí’ (BGH 5746) and 'Roxa de Viçosa' (BGH 6513) proceeding from the Vegetable Germ plasm Bank of the Universidade Federal de Viçosa, three experiments were carried out. Two experiments were conducted with 'Roxa of Viçosa' clone: the first one (spring-spring time) was installed on December 4, 1998 and was concluded on November 1999, while the second one (autumn-autumn time) was installed on April 9, 1999 and was concluded on February 2000. The third experiment was performed at the same time of the second one, but with “Amarela de Carandaí” clone. The experiments consisted of ten treatments on randomized blocks and split-plot design with five replicates. Two planting methods were used in the plots (with and without seedling pre-rooting), and in subplots five seedling types were used (1 – the shoot apex with ± 2.7 cm length and a chamfered cut at the base; 2 – the shoot intermediate segment with ± 4.9 cm length and a chamfered cut at the extremities; 3 - same to type 2, with ± 4.7 cm length and a longitudinal cut on the concave part corresponding to one-quarter of the seedling diameter; 4 - the whole shoot with ± 5.74 cm length and chamfered cuts at the base and longitudinal on the concave part; and 5 - same to type 4, with ± 6.3 cm length and chamfered cut at the base). The following were evaluated: percentage of emerged plants, number of sprouting for plant, number of leaves at the main sprouting and plant height at pre-transplanting (field and pre-rooting seedbed) of the plant population at 65, 150, 210 and 270 days after transplanting. At harvest, the following were appraised: the final population, height and diameter of the plant crown, total weight of plant fresh matter, number and weight of shoots per plant, number of leaves per shoot, and number, length, diameter and weight of the fresh mass of the tuberous root classes, as well as the length, diameter and weight of the crown fresh mass and productivity (kg ha-1) of commercial roots. The variance analyses and the tests of averages (Tukey 5%) indicated that in clones and at the cropping time the seedling planting method without pre-rooting provided both larger growth and yield of roots per plant and commercial roots as well than the method using the pre-rooting, independently of the seedling type, The cropping time influenced the performance of the plants in the field, especially by affecting the pre-rooted seedlings. The best cropping time for both clones was autumn-autumn. There was no effect from seedling type separately upon the appraised characteristics. / Não foram localizados o cpf e o currículo latees do autor.

<p>The chemical and physical properties of nine samples of sodalite have been determined along with the physical properties of an additional thirteen samples. Taken together with selected data from the literature these data indicate that: (1) the cell dimension of sodalite is constant for samples from one deposit within the limits ascribed to experimental error (± 0.0015 A° ) and the variation of a(0) for samples from other deposits is quite limited (i.e. ±0.005 A° ); (2) the specific gravity and refractive index exhibit small but measurable variations which cannot however be related to compositional variation; (3) the variation in chemical composition for sodalite indicated by analyses from the literature appears to be in error; much of the variation is attributed to zeolite impurities which were not removed from the samples before analysis; (4) probably all sodalites are represented to within 5 per cent by 6Na AlSiO(4).2NaCl with less than 0.30 weight per cent H(2)O.</p> <p>A petrographic study of the sodalite deposit at the Princess Quarry, Bancroft, Ontario, indicates that this mineral has formed from the reaction of chlorine-rich solutions with nepheline. The solutions appear to be derived from granite and syenite bodies which are regionally abundant in the vicinity of the Bancroft band of nepheline syenite gneiss. Many facts suggest that the present veins in the quarry have formed by the replacement of a pre-existing nepheline pegmatite.</p> / Thesis / Master of Science (MSc)

Made available in DSpace on 2016-02-26T12:59:38Z (GMT). No. of bitstreams: 1 LovaineFielQuevedo.pdf: 620500 bytes, checksum: 08eab76655f81a2963bd3792dbb028e6 (MD5) Previous issue date: 2007-04-20 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / This work aimed to know yield and net income of amarela de carandaí Peruvian carrot in answer to the use of two and three rows per plot (50 cm and 33 cm, respectively) and three spaces among plants (20, 30 and 40 cm). Treatments were arranged as 2 (number of rows per plot) x 3 (spaces among plants) factorial, in a randomized experimental block design, with four replications. Harvest was done in two dates: at 213 and 242 days after planting (DAP), when plants showed, respectively, more than 50% and 70% of senescence of leaf area. Plant heights, fresh and dried mass of leaves, shoots, crowns, commercial (mass greater than 40g) and non-commercial (smaller than 40g) roots were evaluated. The validation of this work was done by determination of gross and net income. In harvest done at 213 DAP, significative effect of number of rows per plot for fresh mass of non commercial roots and of spaces among plants for plant heights and for fresh mass of shoots was found. In harvest done at 242 DAP, there was a significative effect of number of rows for yields of fresh mass of shoots, crowns, commercial and non commercial roots and of spaces among plants for fresh mass of shoots, crowns and non commercial roots. By obtained results for yields of fresh and dried masses of different botanical compounds that were evaluated for Peruvian carrot, as a function of number of rows of plants per plot, independed on the existence or not of the significative effect of the treatment, it was concluded that the planting under three rows per plot was the best (average of 65,934 plants ha-1) in relation to the yields of plants under two rows (average of 43,956 plants ha-1). When it is compared the average yield obtained from harvest at 213 DAP and at 242 DAP, for fresh and dried mass, it was observed that in the second harvest there were yield increases for different morphological compounds of plants, in relation to the first harvest. Fresh masses of commercial roots represented discardable residues. The greatest yields of commercial roots (12.98 t ha-1) and net income (R$ 17,820.66) were obtained from plants that were harvest at 242 DAP and cultivated under three rows per plot and spaced 30 cm among plants when related with the greatest yields (6.94 t ha-1) and net income (R$ 8,760.66) that were obtained from plants that were harvested at 213 DAP and cultivated under three rows per plot and spaced 20 cm among plants. Observing the estimative average related to net income, it was concluded that, for Peruvian carrot producer, harvest done at 242 DAP was the best because it can increase in 107.52% (R$ 13,413.95) net income, in average, in relation to harvest done at 213 DAP (R$ 6,463.95) / O trabalho teve como objetivo conhecer a produção e a renda líquida da mandioquinha-salsa Amarela de Carandaí em resposta ao uso de duas e três fileiras de plantas no canteiro (50 cm e 33 cm respectivamente) e três espaçamentos entre plantas (20, 30 e 40 cm), no município de Dourados MS, em solo do tipo Latossolo Vermelho distroférrico. Os tratamentos foram arranjados como fatorial 2 (número de fileiras no canteiro) x 3 (espaçamentos entre plantas), no delineamento experimental de blocos casualizados, com quatro repetições. A colheita foi feita em duas épocas: aos 213 e 242 dias após o plantio (DAP), quando as plantas apresentavam, respectivamente, mais de 50% e 70% de senescência da parte foliar, época em que avaliaram-se as alturas das plantas. No laboratório foram determinadas as produções de massas frescas e secas de folhas, rebentos, coroas, raízes comerciais (massa maior que 40 g) e raízes não comerciais (menores que 40 g). A validação do trabalho foi realizada pela determinação das rendas bruta e líquida. Na colheita aos 213 DAP encontrou-se efeito significativo do número de fileiras no canteiro para massa fresca de raízes não comerciais e do espaçamento entre plantas para altura de plantas e para massa fresca de rebentos. Na colheita aos 242 DAP houve efeito significativo do número de fileiras para as produções de massas frescas de rebentos, coroas, raízes comerciais e raízes não-comerciais e do espaçamento entre plantas para massa fresca de rebentos, coroas e raízes nãocomerciais. Os resultados obtidos para produções de massas frescas e secas dos diferentes componentes botânicos avaliados na mandioquinha-salsa, em função do número de fileiras de plantas no canteiro, independente da existência ou não de efeito significativo do tratamento, mostraram que foi melhor o plantio com três fileiras de plantas por canteiro (média de 65.934 plantas ha-1) em relação às produções das plantas sob duas fileiras (média de 43.956 plantas ha-1). Quando se compararam as médias produtivas obtidas nas colheitas aos 213 DAP e aos 242 DAP, para massas frescas e secas, observou-se que na segunda colheita houve incrementos produtivos nos diferentes componentes morfológicos das plantas, em relação à primeira colheita. As massas frescas de raízes comercializáveis representaram apenas 26,81% na colheita aos 213 DAP e 31,90% aos 242 DAP em relação à produção total das plantas onde, as folhas, rebentos, coroas e raízes não-comercializáveis, representaram os resíduos descartáveis. As maiores produções de raízes comerciais (12,98 t ha-1) e renda líquida (R$ 17.820,66) foram obtidas nas plantas colhidas aos 242 DAP e cultivadas sob três fileiras no canteiro e 30 cm de espaçamento entre plantas quando relacionadas com as maiores produção (6,94 t ha-1) e renda líquida (R$ 8.760,66) obtidas nas plantas colhidas aos 213 DAP e cultivadas sob três fileiras no canteiro e 20 cm de espaçamento entre plantas. Observando-se as estimativas médias relativas à renda líquida, conclui-se que para o produtor de mandioquinha-salsa, foi melhor a colheita aos 242 DAP porque poderia aumentar em 107,52 % (R$ 13.413,95) a renda líquida, em média, em relação à colheita aos 213 DAP (R$ 6.463,95)

Made available in DSpace on 2016-02-26T12:59:17Z (GMT). No. of bitstreams: 1 LovaineFielQuevedo.pdf: 620500 bytes, checksum: 08eab76655f81a2963bd3792dbb028e6 (MD5) Previous issue date: 2007-04-20 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / This work aimed to know yield and net income of amarela de carandaí Peruvian carrot in answer to the use of two and three rows per plot (50 cm and 33 cm, respectively) and three spaces among plants (20, 30 and 40 cm). Treatments were arranged as 2 (number of rows per plot) x 3 (spaces among plants) factorial, in a randomized experimental block design, with four replications. Harvest was done in two dates: at 213 and 242 days after planting (DAP), when plants showed, respectively, more than 50% and 70% of senescence of leaf area. Plant heights, fresh and dried mass of leaves, shoots, crowns, commercial (mass greater than 40g) and non-commercial (smaller than 40g) roots were evaluated. The validation of this work was done by determination of gross and net income. In harvest done at 213 DAP, significative effect of number of rows per plot for fresh mass of non commercial roots and of spaces among plants for plant heights and for fresh mass of shoots was found. In harvest done at 242 DAP, there was a significative effect of number of rows for yields of fresh mass of shoots, crowns, commercial and non commercial roots and of spaces among plants for fresh mass of shoots, crowns and non commercial roots. By obtained results for yields of fresh and dried masses of different botanical compounds that were evaluated for Peruvian carrot, as a function of number of rows of plants per plot, independed on the existence or not of the significative effect of the treatment, it was concluded that the planting under three rows per plot was the best (average of 65,934 plants ha-1) in relation to the yields of plants under two rows (average of 43,956 plants ha-1). When it is compared the average yield obtained from harvest at 213 DAP and at 242 DAP, for fresh and dried mass, it was observed that in the second harvest there were yield increases for different morphological compounds of plants, in relation to the first harvest. Fresh masses of commercial roots represented discardable residues. The greatest yields of commercial roots (12.98 t ha-1) and net income (R$ 17,820.66) were obtained from plants that were harvest at 242 DAP and cultivated under three rows per plot and spaced 30 cm among plants when related with the greatest yields (6.94 t ha-1) and net income (R$ 8,760.66) that were obtained from plants that were harvested at 213 DAP and cultivated under three rows per plot and spaced 20 cm among plants. Observing the estimative average related to net income, it was concluded that, for Peruvian carrot producer, harvest done at 242 DAP was the best because it can increase in 107.52% (R$ 13,413.95) net income, in average, in relation to harvest done at 213 DAP (R$ 6,463.95) / O trabalho teve como objetivo conhecer a produção e a renda líquida da mandioquinha-salsa Amarela de Carandaí em resposta ao uso de duas e três fileiras de plantas no canteiro (50 cm e 33 cm respectivamente) e três espaçamentos entre plantas (20, 30 e 40 cm), no município de Dourados MS, em solo do tipo Latossolo Vermelho distroférrico. Os tratamentos foram arranjados como fatorial 2 (número de fileiras no canteiro) x 3 (espaçamentos entre plantas), no delineamento experimental de blocos casualizados, com quatro repetições. A colheita foi feita em duas épocas: aos 213 e 242 dias após o plantio (DAP), quando as plantas apresentavam, respectivamente, mais de 50% e 70% de senescência da parte foliar, época em que avaliaram-se as alturas das plantas. No laboratório foram determinadas as produções de massas frescas e secas de folhas, rebentos, coroas, raízes comerciais (massa maior que 40 g) e raízes não comerciais (menores que 40 g). A validação do trabalho foi realizada pela determinação das rendas bruta e líquida. Na colheita aos 213 DAP encontrou-se efeito significativo do número de fileiras no canteiro para massa fresca de raízes não comerciais e do espaçamento entre plantas para altura de plantas e para massa fresca de rebentos. Na colheita aos 242 DAP houve efeito significativo do número de fileiras para as produções de massas frescas de rebentos, coroas, raízes comerciais e raízes não-comerciais e do espaçamento entre plantas para massa fresca de rebentos, coroas e raízes nãocomerciais. Os resultados obtidos para produções de massas frescas e secas dos diferentes componentes botânicos avaliados na mandioquinha-salsa, em função do número de fileiras de plantas no canteiro, independente da existência ou não de efeito significativo do tratamento, mostraram que foi melhor o plantio com três fileiras de plantas por canteiro (média de 65.934 plantas ha-1) em relação às produções das plantas sob duas fileiras (média de 43.956 plantas ha-1). Quando se compararam as médias produtivas obtidas nas colheitas aos 213 DAP e aos 242 DAP, para massas frescas e secas, observou-se que na segunda colheita houve incrementos produtivos nos diferentes componentes morfológicos das plantas, em relação à primeira colheita. As massas frescas de raízes comercializáveis representaram apenas 26,81% na colheita aos 213 DAP e 31,90% aos 242 DAP em relação à produção total das plantas onde, as folhas, rebentos, coroas e raízes não-comercializáveis, representaram os resíduos descartáveis. As maiores produções de raízes comerciais (12,98 t ha-1) e renda líquida (R$ 17.820,66) foram obtidas nas plantas colhidas aos 242 DAP e cultivadas sob três fileiras no canteiro e 30 cm de espaçamento entre plantas quando relacionadas com as maiores produção (6,94 t ha-1) e renda líquida (R$ 8.760,66) obtidas nas plantas colhidas aos 213 DAP e cultivadas sob três fileiras no canteiro e 20 cm de espaçamento entre plantas. Observando-se as estimativas médias relativas à renda líquida, conclui-se que para o produtor de mandioquinha-salsa, foi melhor a colheita aos 242 DAP porque poderia aumentar em 107,52 % (R$ 13.413,95) a renda líquida, em média, em relação à colheita aos 213 DAP (R$ 6.463,95)

Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2018-08-21T19:46:40Z No. of bitstreams: 1 2009 - Carla Andreia da Cunha Martins.pdf: 6594844 bytes, checksum: 336fdb999764e447e38cb6a0c803c837 (MD5) / Made available in DSpace on 2018-08-21T19:46:40Z (GMT). No. of bitstreams: 1 2009 - Carla Andreia da Cunha Martins.pdf: 6594844 bytes, checksum: 336fdb999764e447e38cb6a0c803c837 (MD5) Previous issue date: 2009-02-28 / CNPq / Population in general is getting more interested in consuming healthy food. Alternative eco-agricultural cropping practices are being emphasized, thanks to the benefits to sustainable agricultural and environment systems. Management of organic and mineral fertilizers, in search of nutrient efficiency, is directly related to environmental, social and economical issues. As plants become more efficient to absorb nutrients, the farmer can count on better products quality and, consequently, to better economic results. The experiments described in the chapters one and two of this study were conducted, respectively, in Fazenda C?rrego Frio and in Fazenda Santo Ant?nio de Estrela, both in Nova Friburgo municipality, Rio de Janeiro State. The first one was accomplished in partnership with Pesagro-Nova Friburgo, and it aimed to evaluate the production of the arracacha (Arracacia xanthorrhiza Bancroft) plant associated with covering plants. The experimental design was of random blocks with four repetitions, and four management treatments: conventional (control), spontaneous vegetation, black oats (Avena strigosa Schreb), and consortium black oats + Villosa villosa. The arracacha variety tested in both studies was the ?Amarela de Caranda?? (AC). The results showed that in the treatments with oats and oat + Villosa villosa, the accumulation of dry mass in the plant and their parts was smallest. The production of commercial roots was higher at 12 months after the planting (MAP) for the conventional and spontaneous vegetation treatments. The second experiment aimed to evaluate the yield of the arracacha crop submitted to increasing doses of phosphorus, with two sources of the fertilizer. The experimental design was of randomly blocks with 4 repetitions and 12 treatments, that consisted of 2 phosphorous sources (simple super phosphate and rock phosphate), and 6 phosphorous doses (0 - without phosphorus - control), 40, 80, 120, 240 and 480 kg P2O5 ha-1). The largest production of total and commercial roots was verified in the treatments with rock phosphate as source of P. The highest total levels of sulfur in the plants were found in the treatments with simple super phosphate. Concerning the accumulation of total nutrients, it was observed a similarity between the two sources of phosphorous. A third experiment was conducted in a greenhouse, located in Serop?dica municipality - RJ. The experimental design was of randomly blocks with four repetitions and six treatments. The treatments consisted of increasing doses of gypsum (CaSO4H2O) as following: 12.5; 25; 50; 100; 200 kg ha-1 of S and a control without gypsum. The soil material was sampled from an Udult soil and the cultivated variety was ?Amarela de Senador Amaral? (ASA). The objective of the study was to evaluate the effect of the sulphur addition in the crop yield. There were determinate: plant dry matter weight; and the levels of N, P, K and S in the plant tissue. The highest doses of S increased the dry matter accumulated in leaves + petioles. Concerning the sulfur accumulation, it was dose dependent for the three parts of the arracacha plant. Despite the conditions in which this research was conducted (greenhouse), it was possible to conclude preliminarily that the ASA is responsive to sulphur fertilization. / O interesse pelo consumo de alimentos saud?veis vem despertando maior aten??o da popula??o. Pr?ticas altenativas de cultivo visando ? agricultura agroecol?gica v?m se destacando em fun??o da sustentabilidade dos sistemas agr?colas e ambientais. O manejo dos fertilizantes org?nicos e minerais buscando a efici?ncia de uso de nutrientes est? diretamente relacionado a quest?es de import?ncia social, econ?mica e ambiental. O melhor aproveitamento dos nutrientes pelas plantas, consequentemente, levar? a uma melhor qualidade da produ??o agr?cola e uma maior rentabilidade para o produtor rural. Os experimentos referentes aos cap?tulos um e dois foram instalados na Fazenda C?rrego Frio e na Fazenda Santo Ant?nio de Estrela, em Nova Friburgo ? RJ. O primeiro trabalho em parceria com a Pesagro-Nova Friburgo, objetivou o estudo da produ??o da mandioquinha-salsa (Arracacia xanthorrhiza Bancroft) consorciada com plantas de cobertura. O delineamento experimental foi de blocos ao acaso com quatro repeti??es e quatro tratamentos de manejo: convencional (testemunha), vegeta??o espont?nea, aveia-preta (Avena strigosa Schreb) e cons?rcio aveia-preta+ervilhaca (Vicia villosa). A variedade usada foi Amarela de Caranda? (AC). Os resultados mostraram que os ac?mulos de massa seca na planta e nas suas partes foram menores nos tratamentos com aveia e aveia + ervilhaca. A produ??o de ra?zes comerciais foi maior aos 12 meses ap?s plantio (MAP) para o tratamento convencional e vegeta??o espont?nea. O ac?mulo de nutrientes de modo geral foi maior nos tratamentos convencional e vegeta??o espont?nea aos 12 MAP. O segundo experimento objetivou avaliar a resposta da mandioquinha-salsa a doses crescentes de f?sforo, com duas fontes do fertilizante fosfatado. O delineamento experimental foi de blocos ao acaso com 4 repeti??es e 12 tratamentos, os tratamentos constaram de 2 fontes de f?sforo (superfosfato simples, SS; e fosfato de rocha, FR) e 6 doses de f?sforo (40, 80, 120, 240 e 480 kg P2O5 ha-1) e uma testemunha. A variedade usada foi AC. A maior produ??o de ra?zes totais e ra?zes comerciais foi verificada nos tratamentos com a fonte de P, FR. Os maiores teores totais de enxofre nas plantas foram encontrados nos tratamentos com SS. No ac?mulo de nutrientes totais observou-se semelhan?a nas respostas das duas fontes de f?sforo estudadas. Um terceiro estudo foi realizado em casa-de-vegeta??o no Departamento de Solos-IA da UFRRJ, em Serop?dica ? RJ. O delineamento experimental foi de blocos ao acaso com quatro repeti??es e seis tratamentos. Os tratamentos constaram de doses de gesso (CaSO4.H2O) a seguir: 12,5; 25; 50; 100; 200 kg ha-1 de S e, uma testemunha. O material de solo usado foi de um Argissolo Amarelo e a variedade cultivada foi a Amarela de Senador Amaral (ASA). O objetivo do trabalho foi avaliar a resposta da mandioquinha-salsa ? aduba??o sulfatada. As determina??es foram: peso de mat?ria seca da planta e teores de N, P, K e S no tecido vegetal. O ac?mulo de mat?ria seca de folhas + pec?olos aumentou em fun??o das doses crescentes de enxofre. Quanto ao ac?mulo de enxofre houve resposta em fun??o das doses nas tr?s partes da planta de mandioquinha-salsa. Em uma conclus?o pr?via, por ser o trabalho conduzido em casa-de-vegeta??o, a ASA responde ? aduba??o sulfatada.

Thesis PlanB (M.S.)--University of Wisconsin--Stout, 2007. / Includes bibliographical references.

<p> The Grenville Province represents the remains of a collisional orogeny ca. 1.2 - 1.0 Ga and contains the Central Metasedimentary Belt (CMB). Generally thought to represent one or more accreted island arcs, the CMB is located between belts of highgrade gneisses and contains a number of identified structural terranes. Neodymium (Nd) model ages of the high-grade gneisses on either side of the CMB yield similar values (~1.5 Ga) while the average model age within the CMB is usually more juvenile (<1.3 Ga). This distinction, along with observations about the geometrical shape of the juvenile zone, has led to the creation of an alternative model for the development of the CMB in the Grenville Province as developed by Dickin and McNutt, (2007). The new model equates the CMB with an ensimatic rift zone with an en echelon morphology consisting of a series of segments with NNE trends, separated by one or more horsts of older crustal rock. The development of the CMB under these conditions implies that restricted access to seawater may have facilitated limestone deposition prior to major biogenic influences, and thus the morphology of the rift is defined in part by the extent of the Grenville marble outcrops. </p> <p> The present study tests this model through the use of 80 new Nd isotope analyses to map the NW boundary of the CMB, known as the Central Metasedimentary Belt Boundary Zone (CMBBZ), west of Bancroft, Ontario. Within this part of the CMBBZ, the age boundary between pre-Grenvillian and juvenile gneisses is relatively sharp (1 - 4 km wide) and this age boundary makes a near 90-degree tum from a NNE trend near Minden to an E-W trend near Haliburton. Two blocks of older material are located within the juvenile terranes of the CMB, which are interpreted as being blocks of older crust rifted from the walls of the older Muskoka domain to the north of the study region. These structures are analogous to similar horsts of older crustal material found in the Afar region of East Africa. Therefore, we suggest that the locus of the CMBBZ was constrained by older structures, representing a transition from the side of a rift zone segment south of Minden, to the truncated end of this rift segment between Haliburton and Bancroft. Hence, the detailed structure of the CMBBZ in this region provides further evidence in support of the rift zone model. </p> / Thesis / Master of Science (MSc)

Au Vietnam, malgré les succès du gouvernement dans la lutte contre le paludisme, cette maladie persiste en zones forestières, le long des frontières internationales, en particulier avec le Cambodge, et très peu de données sont disponibles sur la filariose lymphatique de Bancroft (FLB). Aucun vaccin n'étant actuellement disponible, la lutte antivectorielle ciblant les Anopheles, moustiques qui peuvent être vecteurs d'agents du paludisme et de la FLB, reste un des éléments clés pour mieux contrôler ces deux maladies. Toutefois, une meilleure connaissance des vecteurs présents en zones endémiques et l'étude de leur capacité vectorielle s'imposaient compte tenu du manque d'information sur la transmission de ces 2 maladies dans la région centre-sud du Vietnam. La capacité vectorielle étant fortement liée à la flore bactérienne de l'estomac des moustiques, sa biodiversité a été estimée afin de mieux appréhender les familles bactériennes présentes chez les moustiques de terrain, en particulier la présence d'Enterobacteriaceae qui peut avoir une influence sur la résistance des anophèles au développement de Plasmodium, agent du paludisme. Ce champ d'investigation n'avait encore jamais été étudié chez les vecteurs du paludisme au Vietnam.Cette thèse porte sur 2 objectifs principaux : (1) l'évaluation de la capacité vectorielle des espèces d'Anopheles dans la co-transmission de Plasmodium spp. et de Wuchereria bancrofti (agent de la FLB) dans la Province de Dak Nong et de Binh Phuoc du centre-sud Vietnam (à la frontière avec le Cambodge) et (2) l'estimation de la biodiversité de la flore bactérienne de l'estomac de populations d'Anopheles du centre-sud Vietnam et l'évaluation de l'influence de certaines bactéries sur la capacité vectorielle des espèces d'Anopheles. L'identification morphologique et moléculaire des spécimens d'Anopheles collectés dans les sites d'étude nous a permis d'appréhender et de mieux connaître la faune anophélienne du centre-sud Vietnam avec la présence de 24 taxa, dont des vecteurs primaires et secondaires. Les espèces dominantes sont Anopheles dirus (48,2%), An. maculatus (19,1%) et An. minimus (9,8%), trois vecteurs majeurs du paludisme et de la FLB. Pour la première fois au Vietnam, la présence d'An. scanloni, une des 8 espèces du Complexe Dirus et vecteur du paludisme en Thaïlande, a été montrée et confirmée après son identification par techniques moléculaires et séquençage. La relation taxonomique entre An. crawfordi et An. dangi, une espèce nommée de façon informelle au Vietnam en 1987, est clarifiée grâce à une étude phylogénétique qui nous a permis d'établir qu'An. dangi est un variant morphologique d'An. crawfordi.Le taux d'infection parasitaire des anophèles a été analysé grâce à des approches PCR, en temps réel et conventionnelle, afin de déterminer la capacité vectorielle des espèces collectées. Parmi les 765 spécimens d'Anopheles étudiés, 2 spécimens dont 1 An. dirus et 1 An. pampanai, ont été trouvés infectés par P. vivax. Les taux d'infection sont de 0,26% sur l'ensemble de l'échantillon, de 0,41% pour la Province de Binh Phuoc et de 0,28% chez An. dirus et 20% chez An. pampanai. Aucun moustique n'a été trouvé infecté ni par P. falciparum, ni par P. knowlesi et ni par Wuchereria bancrofti. La flore bactérienne de l'estomac des anophèles a été analysée après application de 2 méthodes d'identification basées à la fois sur la culture et la PCR du gène 16S sur 200 abdomens d'anophèles de 11 espèces différentes. Les résultats montrent la présence de 116 genres bactériens, dont 18 genres communs, classés taxonomiquement dans 7 phyla dont Acidobacteria, Actinobacteria, Bacteroidetes, Firmicutes, Planctomycetes, Proteobacteria et Synergistetes. Le genre dominant de Dak Nong est Acinetobacter et celui de Binh Phuoc est Staphyloccocus. Acinetobacter est aussi dominant dans la communauté bactérienne de tous les spécimens d'Anopheles étudiés. / In Vietnam, despite the success of the Government in controlling malaria, the disease persists in forest areas along the international borders, especially with Cambodia, and few data are available on the Bancroftian lymphatic filariasis (BLF). No vaccine is currently available to protect from these two diseases, then vector control of Anopheles mosquitoes, that may transmit both malarial and BLF agents, remains one of the key element to control these two diseases. As there is a real lack of information on the transmission of these two diseases in south-central region of Vietnam, it was necessary to apprehend the vectors occurring in endemic areas and to study their vectorial capacity. As bacterial flora in Anopheles midgut may have a strong influence on the vectorial capacity of the mosquito, its biodiversity was estimated in order to better understand bacterial families present in mosquitoes from the field, in particular the presence of Enterobacteriaceae that can have an influence on the development of Plasmodium, agent of malaria. This field of investigation of bacteria has never studied in malaria vectors of Vietnam.This thesis focuses on two main objectives: (1) to evaluate the vectorial capacity of Anopheles species in the co-transmission of Plasmodium spp. and Wuchereria bancrofti (BLF agent) in the Provinces of Dak Nong and Binh Phuoc in south-central Vietnam (near the border with Cambodia), and (2) to estimate the biodiversity of the bacterial flora in the midgut of Anopheles populations of south-central Vietnam and evaluate the influence of certain bacteria on the vectorial capacity of Anopheles species.Morphological and molecular identification of Anopheles specimens collected in the study sites allowed us to apprehend and better understand the Anopheles fauna in south-central Vietnam composed of 24 taxa, including primary and secondary vectors. The dominant species were Anopheles dirus (48.2%), An. maculatus (19.1%) and An. minimus (9.8%), three major vectors of malaria and the BLF. For the first time, An. scanloni, one of the 8 species of Dirus Complex and malaria vector in Thailand, was collected in Vietnam and confirmed by molecular and sequencing techniques. The relationship between An. crawfordi and An. dangi, a species informally named in Vietnam in 1987, was clarified through a phylogenetic study that allows us to establish that An. dangi is a morphological variation of An. crawfordi.The parasites infection rate of Anopheles was investigated using both real-time PCR and conventional PCR to determine the vectorial capacity of the collected species. Of the 765 Anopheles specimens, 2 individuals, such as 1 An. dirus and 1 An. pampanai, were found infected by P. vivax. Then, the infection rates were of 0.26% on the total sample, 0.41% in Binh Phuoc, 0.28% for An. dirus, and 20% for An. pampanai. No mosquito was found infected by either P. falciparum, P. knowlesi or Wuchereria bancrofti.The bacterial flora in Anopheles midguts was analyzed using 2 identification methods based on culture and on 16S PCR-TTGE processed on 200 abdomens of 11 different Anopheles species. The results obtained showed the presence of 116 bacterial genera, including 18 common genera, belonging to 7 phyla such as Acidobacteria, Actinobacteria, Bacteroidetes, Firmicutes, Planctomycetes, Proteobacteria, and Synergistetes. The dominant genus in Dak Nong was Acinetobacter and Staphyloccocus in Binh Phuoc. Acinetobacter was dominant in the bacterial community of all studied Anopheles. The genus Enterobacter, which can influence the development of the Plasmodium, represented a prevalence of 1.7% of the microbiome of our specimens compared to 39.2% for the predominant genus Acinetobacter. This latter genus was significantly associated to Anopheles infected with Plasmodium vivax.