Data/hora: 11/06/2024 08:58:48

Provedor de dados: | 90
País: | Brazil
Título: | Extraction of soil water by plants: development and validation of a model
Autores: | de Jong van Lier,Q.; Libardi,P. L.
Data: | 1997-12-01
Ano: | 1997
Palavras-chave: | Modelling; Soil water depletion; Soil water extraction.
Resumo: | 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 Queiroz"/Universidade de São Paulo(ESALQ/USP) in Piracicaba, State of São Paulo, Brazil, in 1993. The experimental results are in agreement with the output from the model. Model simulations show that a single plant root is able to withdraw water from more than 0.1 m away within a few days. We therefore can assume that root distribution is a less important factor for soil water extraction efficiency.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06831997000400002
Editor: | Sociedade Brasileira de Ciência do Solo
Relação: | 10.1590/S0100-06831997000400002
Formato: | text/html
Fonte: | Revista Brasileira de Ciência do Solo  v.21 n.4 1997
Fonte: | info:eu-repo/semantics/openAccess