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	Provedor de dados Scientia Agricola (1) Rev. Bras. Ciênc. Solo (1) Autor Jong Van Uer,Q. de (1) Libardi,P. L. (1) de Jong van Lier,Q. (1) Palavra-chave Soil water extraction (2) Critical soil water content (1) Modelling (1) Soil water depletion (1) Soil water dynamics (1) Tipo do documento Info:eu-repo/semantics/article (2) Ano 1997 (2) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Extraction of soil water by plants: development and validation of a model Rev. Bras. Ciênc. Solo de Jong van Lier,Q.; Libardi,P. L.. A quantitative model of water movement within the immediate vicinity of an individual root is developed and results of an experiment to validate the model are presented. The model is based on the assumption that the amount of water transpired by a plant in a certain period is replaced by an equal volume entering its root system during the same time. The model is based on the Darcy-Buckingham equation to calculate the soil water matric potential at any distance from a plant root as a function of parameters related to crop, soil and atmospheric conditions. The model output is compared against measurements of soil water depletion by rice roots monitored using γ-beam attenuation in a greenhouse of the Escola Superior de Agricultura "Luiz de... Tipo: Info:eu-repo/semantics/article Palavras-chave: Modelling; Soil water depletion; Soil water extraction. Ano: 1997 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06831997000400002 The critical soil water content and its relation to soil water dynamics Scientia Agricola Jong Van Uer,Q. de. Using an edaphic model that describes the extraction of soil water by plant roots, the occurrence of depletion zones dose to plant roots is demonstrated. These depletion zones affect the root water potential that is needed to maintain a certain transpiration rate. The results show how the critical soil water content depends on soil's hydraulic properties, transpiration rate and root density. Tipo: Info:eu-repo/semantics/article Palavras-chave: Critical soil water content; Soil water extraction; Soil water dynamics. Ano: 1997 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161997000300009 Registros recuperados: 2 Primeira ... 1 ... Última

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