Data/hora: 12/06/2024 02:46:45

Provedor de dados: | 90
País: | Brazil
Título: | Plant-available soil water capacity: estimation methods and implications
Autores: | Silva,Bruno Montoani; Silva,Érika Andressa da; Oliveira,Geraldo César de; Ferreira,Mozart Martins; Serafim,Milson Evaldo.
Data: | 2014-04-01
Ano: | 2014
Palavras-chave: | Field capacity; Permanent wilting point; Soil water retention curve modeling; Oxisol; Land use planning.
Resumo: | The plant-available water capacity of the soil is defined as the water content between field capacity and wilting point, and has wide practical application in planning the land use. In a representative profile of the Cerrado Oxisol, methods for estimating the wilting point were studied and compared, using a WP4-T psychrometer and Richards chamber for undisturbed and disturbed samples. In addition, the field capacity was estimated by the water content at 6, 10, 33 kPa and by the inflection point of the water retention curve, calculated by the van Genuchten and cubic polynomial models. We found that the field capacity moisture determined at the inflection point was higher than by the other methods, and that even at the inflection point the estimates differed, according to the model used. By the WP4-T psychrometer, the water content was significantly lower found the estimate of the permanent wilting point. We concluded that the estimation of the available water holding capacity is markedly influenced by the estimation methods, which has to be taken into consideration because of the practical importance of this parameter.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000200011
Editor: | Sociedade Brasileira de Ciência do Solo
Relação: | 10.1590/S0100-06832014000200011
Formato: | text/html
Fonte: | Revista Brasileira de Ciência do Solo  v.38 n.2 2014
Fonte: | info:eu-repo/semantics/openAccess