Root Water Uptake
Mostrando 13-24 de 53 artigos, teses e dissertações.
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13. Extração de água do solo por plantas de soja: modelagem hidrofísica e empírica / Root water uptake by soybean plants: hydrophysical and empirical modeling
A extração de água do solo pelas plantas esta intimamente relacionada com a produtividade das culturas. O objetivo do presente estudo foi avaliar o desempenho das funções de redução de Jong Van Lier et al. (2008) e de Feddes, Kowalik e Zaradny (1978) na estimativa da extração de água por plantas de soja sob condições úmidas. A primeira e formali
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/01/2012
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14. Modelo de distribuicao de agua e de potencial matricial no solo sob gotejamento com extracao de agua por raizes.
A maior dificuldade em descrever e estimar a distribuicao de agua no bulbo molhado sob gotejamento reside na extracao de agua pelo sistema radicular, que e mais complexa devido a geometria de fluxo tridimensional. Os modelos existentes sao, na maioria, unidimensionais ou multidimensionais de acessibilidade limitada. Este trabalho propoe um modelo semi-analit
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
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15. Effect of Phytoaccumulation of Arsenic and Chromium on Structural and Ultrastructural Changes of Brake Fern (Pteris vittata)
Structural and ultrastructural changes caused by bioaccumulation of As and Cr in brake fern (Pteris vittata), a known arsenic hyperaccumulator, were investigated. Potted plants of brake fern were exposed to metal treatments of As and Cr for three weeks. Leaf, stem and root samples were collected periodically and fixed for LM (Light Microscopy), SEM (Scanning
Brazilian Journal of Plant Physiology. Publicado em: 2011
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16. Impact of saline water stress on nutrient uptake and growth of cowpea
Soil salinity is a major limitation to crops production in many areas of the world. The present study reports the impact of salt stress on seeds germination, plant growth parameters and leaf ions accumulation in three cowpea Vigna unguiculata (L.) Walp Indian cultivars: Akshay102, Gomti vu-89 and Pusa Falguni. The electrical conductivity (EC) of the soil was
Brazilian Journal of Plant Physiology. Publicado em: 2010
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17. Plant transpiration and soil hydraulic conditions / Transpiração de plantas e condições hidráulicas do solo
Taxas de transpiração inferiores às taxas potenciais limitam o crescimento e desenvolvimento vegetal e ocorrem em solos que apresentam condições hidráulicas inadequadas para a manutenção do fluxo de água requerido em direção às raízes de uma planta. A pesquisa que resultou nesta tese teve como objetivos: estimar em quais condições hidráulicas
Publicado em: 2008
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18. Efeitos da compactaÃÃo do solo e da umidade sobre a absorÃÃo de N, P, K, os componentes de produÃÃo e a produtividade de grÃos de arroz. / Effects of soil compaction and moisture upon the uptake of N, P,K , yield components and rice grain yield
The work was intended to study the effects of different compaction levels and water management upon the uptake of nitrogen (N), phosphorus (P) and potassium (K), the development of the root system and shoot of rice plants , the yield components and rice grain yields grown in two sorts of soil. The experiment was conducted in greenhouse of the Agriculture Dep
Publicado em: 2004
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19. Consumption of fertilizing solutions for adult plants of tahiti lime on rangpur lime in localized irrigation. / Consumo de soluções fertilizantes por plantas adultas de lima ácida Tahiti sobre limão Cravo em irrigação localizada.
The citriculture plays fundamental role in the agribusiness of the State of São Paulo, however in the last 5 years many citrus growers feel the need to irrigate their orchards, looking for the stability and yield increase. For the development of the project three experiments were installed, being the first to evaluate the porous lysimeter developed by Macha
Publicado em: 2004
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20. Uso do modelo Ceres-Maize para previsão de safra do milho "safrinha". / Using ceres-maize model for maize sown off-season yield forecast.
The objectives of the present work were: 1) to study the phenology and development of four maize hybrids: AG9010, DAS CO32, Exceler and DKB 333B sown off-season in Piracicaba region, State of São Paulo, Brazil; 2) to calibrate and test the CERES-Maize model to estimate the productivity and development for the four maize hybrids sown off-season for the menti
Publicado em: 2004
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21. Crescimento e atividade fotossintetica em duas especies de lianas de uma floresta estacional semidecidual
The lianas are copious in natural and man-made clearings and it appears that these forms of life require high irradiance for development and growth. Lianas are rooted in the soil and use other plants, especially trees as support. Since these plants begin their growth on the forest floor, then ascend to the canopy, they can experience extreme differences in r
Publicado em: 2004
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22. Effects of Ammonium Nutrition on Water Stress, Water Uptake, and Root Pressure in Lycopersicon esculentum Mill 1
Ammonium (NH4+) nutrition inhibits water uptake and root exudation and decreases leaf water potential of tomato plants grown in solution culture. This inhibition is readily reversible by NO3− for short term exposures to NH4+; however, recovery is delayed following long term exposures.
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23. Soil Temperature Influences on Root Resistance of Pinus contorta Seedlings 1
The influence of low temperature in the root zone on water uptake in lodgepole pine (Pinus contorta Dougl. ex Loud.) was studied under laboratory conditions. To remove soil hydraulic influences, two-year-old seedlings were transferred to solution cultures and maintained in temperature controlled water baths. Short term measurements of leaf conductance, leaf
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24. Ethylene Enhances Water Transport in Hypoxic Aspen1
Water transport was examined in solution culture grown seedlings of aspen (Populus tremuloides) after short-term exposures of roots to exogenous ethylene. Ethylene significantly increased stomatal conductance, root hydraulic conductivity (Lp), and root oxygen uptake in hypoxic seedlings. Aerated roots that were exposed to ethylene also showed enhanced Lp. An
American Society of Plant Physiologists.