Data/hora: 09/06/2024 15:46:42

Provedor de dados: | Revista Brasileira de Ciência do Solo
País: | Brazil
Título: | Estimation of water retention and availability in soils of Rio Grande do Sul
Autores: | Reichert,José Miguel; Albuquerque,Jackson Adriano; Kaiser,Douglas Rodrigo; Reinert,Dalvan José; Urach,Felipe Lavarda; Carlesso,Reimar.
Data: | 2009-12-01
Ano: | 2009
Palavras-chave: | Pedotransfer functions; Texture class; Water retention curve; Mineralogy.
Resumo: | Dispersed information on water retention and availability in soils may be compiled in databases to generate pedotransfer functions. The objectives of this study were: to generate pedotransfer functions to estimate soil water retention based on easily measurable soil properties; to evaluate the efficiency of existing pedotransfer functions for different geographical regions for the estimation of water retention in soils of Rio Grande do Sul (RS); and to estimate plant-available water capacity based on soil particle-size distribution. Two databases were set up for soil properties, including water retention: one based on literature data (725 entries) and the other with soil data from an irrigation scheduling and management system (239 entries). From the literature database, pedotransfer functions were generated, nine pedofunctions available in the literature were evaluated and the plant-available water capacity was calculated. The coefficient of determination of some pedotransfer functions ranged from 0.56 to 0.66. Pedotransfer functions generated based on soils from other regions were not appropriate for estimating the water retention for RS soils. The plant-available water content varied with soil texture classes, from 0.089 kg kg-1 for the sand class to 0.191 kg kg-1 for the silty clay class. These variations were more related to sand and silt than to clay content. The soils with a greater silt/clay ratio, which were less weathered and with a greater quantity of smectite clay minerals, had high water retention and plant-available water capacity.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000600004
Editor: | Sociedade Brasileira de Ciência do Solo
Relação: | 10.1590/S0100-06832009000600004
Formato: | text/html
Fonte: | Revista Brasileira de Ciência do Solo  v.33 n.6 2009
Fonte: | info:eu-repo/semantics/openAccess