La conductividad hidráulica del suelo estudiada en el Valle del Cauca con el nuevo indicador del USDA
Resumen
ABSTRACT
The hydraulic conductivity of soil studied in the “Valle del Cauca� with the new indicator of the USDA. A study was carried out in four soils (Typic Pellustert, Cumulic Haplustoll, Petrocalcic Natrustalf y Fluventic Haplustoll) of the International Center for Tropical Agriculture (CIAT), Colombia, using a nested flexible mesh of 68 points of sampling in two depths (superficially and a zone of small penetration). The index “Rosetta� of hydraulic conductivity was calculated by the pedotransfer function that conjugates bulk density and soil texture, and brings the option to work with the soil curve characteristic. In order to validate it was studied the degree of linear correlation with the following checks: basic infiltration by infiltrometer rings method, saturated hydraulic conductivity deduced from accumulated intake curve obtained of the test of infiltration, the calculated from the saturated flow in the pozuelos and hydraulic conductivity saturated by the method of permeameter of constant head. With the purpose of explaining the variability of the index, was studied the multivariate relation with other physical properties. This index of hydraulic conductivity did not have application in these soils due to low correlations with the checks. The variability depended to a great extent on the structure, soil texture, consistency and drainage.
Key words: Rosetta index of hydraulic conductivity, pedotransfer functions.
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