Data/hora: 06/06/2024 00:56:10

Provedor de dados: | 90
País: | Brazil
Título: | Hydraulic conductivity and water retention in leptosols-regosols and saprolite derived from sandstone, Brazil
Autores: | Araújo Pedron,Fabrício de; Fink,Jessé Rodrigo; Rodrigues,Miriam Fernanda; Azevedo,Antonio Carlos de.
Data: | 2011-08-01
Ano: | 2011
Palavras-chave: | Pedology; Soil physics; Soil water infiltration.
Resumo: | Leptosols and Regosols are soils with a series of restrictions for use, mainly related to the effective depth, which have been poorly studied in Brazil. These soils, when derived from sedimentary rocks should be treated with particular care to avoid environmental damage such as aquifer contamination. The purpose of this study was to verify the behavior of hydraulic conductivity and water retention capacity in profiles of Leptosols and Regosols derived from sandstone of the Caturrita formation in Rio Grande do Sul state. The morphology, particle size distribution, porosity, soil density (Ds), saturated hydraulic conductivity (Ks), basic water infiltration in the field (BI) and water retention were determined in soil and saprolite samples of six soil profiles. High Ds, low macroporosity and high microporosity were observed in the profiles, resulting in a low Ks and BI, even under conditions of sandy texture and a highly fractured saprolite layer. The variation coefficients of data of Ks and BI were high among the studied profiles and between replications of a same profile. Water retention of the studied soils was higher in Cr layers than in the A horizons and the volume of plant-available water greater and variable among A horizons and Cr layers.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000400018
Editor: | Sociedade Brasileira de Ciência do Solo
Relação: | 10.1590/S0100-06832011000400018
Formato: | text/html
Fonte: | Revista Brasileira de Ciência do Solo  v.35 n.4 2011
Fonte: | info:eu-repo/semantics/openAccess