Avaliação da infiltração de água no solo, em sistema de integraçãoagricultura-pecuária, com uso de infiltrômetro de aspersãoportátil

Abstract

Evaluation of the infiltration rate in pasture-agriculture integration system, using a portable sprinkler infiltrometer. This study was carried out in Dourados, State of Mato Grosso do Sul, Brazil, in order to evaluate the soil water infiltration characteristics in three different tillage systems: pasture (System A), oat in minimum tillage (System B) and continuous pasture (System C). The field tests were performed by a sprinkler infiltrometer, regulated for rainfall intensities of 60 mm h-1 and 100 mm h-1. Based on the field data, the Kostiakov-Lewis and Horton models were adjusted. It was concluded that: a) System B presented the largest stable infiltration rate for the intensity of 60 mm h-1, and the lowest rate when the rainfall intensity was 100 mm h-1; b) The Horton model adjusted better to the field data, presenting determination coefficients always higher than 88.0%.