Manejo de culturas de cobertura em sistema plantio direto.

Abstract

The present work had for objective to study the acting of 3 systems of handlings (rollknife, crusher of straws and herbicide), about the production of dry mass (kg.ha-1) of 2 vegetable coverings (Crotalaria juncea L. e Stilozobium niveum), the speed of displacement and capacity of field accomplishes for each set (tractor-equipment). The experiment was accomplished in area of Laboratório de Máquinas e Mecanização Agrícola, of the Departamento de Engenharia Rural, FCAV/UNESP, Jaboticabal, SP, with experimental design consisted of a factorial scheme 3x2 with fully randomized blocks, origin 6 treatments with 4 repetitions. The factor handling didn’t interfere in the mass it evaporates of covering vegetable. The cultures present similar masses to the 30, 71 and 125 days after the scattered, differing to the 97 days, was the Crotalaria juncea L. present larger mass earnings. In the powders handling the 2 cultures have masses similar to the 30, 51 and 71 days after the handling, in other words, during whole the experiment. The handling with herbicide present larger effective field capacity then is dependent of humidity.