Atributos físicos e a hidrodinâmica nos solos sob coberturas vegetais em uma microbacia hidrográfica do Rio Caiabi

Abstract

The hydraulic conductivity (K0) is an attribute that helps to understand the dynamics of water in the soil, and phenomena of considerable importance as the ability of soil to retain water or reset it to the groundwater. For water percolate through the soil profile is necessary that the soil physical attributes present conditions that allow infiltration and which do not favor the runoff, which can cause problems such as soil erosion. In this sense this study aims to evaluate the hydraulic conductivity in the saturated soil in crop area (LA), pasture (PA) and native forest (MN), in the watershed Caiabi river, and relates it with textural class, density soil (DS), porosity, penetration resistance (RP), aggregates and organic matter (OM). The native forest displays the largest K0 values relative to LA and PA. In the MN the K0 values are concatenated with physical parameters, indicating that when the soil has good structural condition K 0 increased. Tillage and grassland decreased in K0, evidenced by increases in DS values and RP, which are inversely proportional to K0. Concluded that K0 is directly influenced by physical attributes along with the usage type.