Manejo de solo e efeito residual da gessagem sobre atributos físicos e químicos de um latossolo vermelho distroférrico e no desenvolvimento da soja

Abstract

The objective of this work was to evaluate the gypsum residual effect and two tillage system on chemicals and physicals attributes. The experimente was carried out in 2004/2005 on the experimental field of Mato Grosso do Sul Federal University-UFMS, in Dourados, MS, on a red distroférric Latossol (Hapludox). The experimental desingn was a split split plot arrangement of trataments in a randomized complete block with four replications. Main plots consisted of two tillage system (no tillage and conventional tillage), split plots were gypsum doses (0 and 2000 kg ha-1) and split split plots the depths.. The follwing parameters were estimated: pH in H20, pH in kCl, pH in CaCl2, DpH, K+, Ca+2, Mg+2,P+, Al+3, base saturation, basses sum, cátion excharge capaciby, particle density, soil bulk density, soil total porosity.The interaction between tillage system and dose gypsum was significant for soil density and total porosity, with increase in the soil density and total porosity redution on combination no tillage and 2000 kg ha-1 of gypsum. The tillage system and gypsum residual effect did not affect the chemicals attributes, except the P drift that was bigger in no tillage system than conventional tillage.