Physical and chemical attributes of the soil and production of corn and soybean in function of application of soil conditioner

Abstract

The use of soil conditioners has been increasingly in grain crops farmers in the Alto Vale do Itajaí, SC. In this aspect, the objective of this study was to evaluate chemical and physical attributes of the soil and grain yield of corn (Zea mays) and soybeans (Glycine max) after the application of different doses of soil conditioner in consolidated no-tillage. The experiment was carried out in a farm in the municipality of Agronômica, SC in two experimental areas, one cultivated with corn and the other with soybean in the 2017/2018 summer crop, both under a no-tillage system. The experimental design consisted of randomized blocks with three replications. The treatments were doses of Lignite-based soil conditioner: 0 (control), 10, 20 and 40 liters per hectare. The conditioner was applied on the vetch and oats straw before sowing the soybean and corn. It was evaluated the exchangeable K content, organic matter, CTC_{pH 7,0}, pH in water in the 0-5 cm depth layer and the macro, micro and total porosity and soil density in the layers 0-5, 5-10, 10-15 e 15-20 cm. The grain yield of corn and soybean was also evaluated. It is concluded that the application of soil conditioner does not improve the chemical and physical attributes of the soil, and has no effect on the yield of corn and soybean within the doses evaluated.