Influência de diferentes preparos de solo e adubos verdes sobre as propriedades químicas do solo após a colheita da soja

Abstract

The adoption of soil conservation practices has been increasing in Brazil, aiming to reduce losses, such as the use of green manures, with that the objective of this work was to evaluate the effect of soil preparation systems and green manures in the chemical quality of the soil after the soybean culture. Forage turnip and millet are some of the options that add to the sustainable production of soy. The experiment was conducted at the experimental station of the Federal University of Mato Grosso do Sul, on the campus of Chapadão do Sul. The experimental design was in randomized blocks in subdivided plots in which they were constituted of three different soil managements: Conventional tillage system (CC), Minimum tillage system (CM) and Direct tillage system (PD). The subplots consisted of four soil cover: fallow, millet, forage turnip and millet+turnip. The following soil parameters were evaluated: pH (CaCl2), Calcium (Ca), Magnesium (Mg), Aluminum (Al), Hydrogen + Aluminum (H+Al), Potassium in cmolc dm-3 (K1), Potassium in mg dm-3 (K), Phosphorus (P meh), Organic Matter (M.O), Organic Carbon (C-Org), Copper (Cu), Iron (Fe), Manganese (Mn) and Zinc (Zn). It was verified that the minimum and conventional tillage systems presented the best results for K concentration in the soil, as for the coverings, all of them reflected directly on the availability of K.