PLANTABILIDADE NA CULTURA DA SOJA [Glycine max (L.) Merrill] EM SISTEMA DE INTEGRAÇÃO LAVOURA PECUÁRIA

Abstract

With the technological evolution adopted by agricultural producers in Brazil, the concern with the efficiency of sowing has also increased. Thus, this work aimed to evaluate the quantitative aspects of soybean cultivation on Panicum forage straw in a crop-livestock integration system, aiming the plantability of soybean crop in succession to forage. The experiment was conducted in the experimental area belonging to the Comigo Technological Institute (ITC) in Rio Verde - GO. The design was in randomized blocks with four replications. The treatments consisted of two cultivation systems: soybean in succession of corn and soybean in succession of Tamani grass (Panicum maximum cv. BRS Tamani) in crop-livestock integration. Four conditions of grass regrowth at 54, 47, 40 and 22 days of rest after leaving the animals were evaluated. Four samples of residual straw were collected with a quadrant of one square meter to quantify biomass production. Planting was performed 15 days after sowing. Evaluated agronomic performance through soybean crop yield. The results were submitted to analysis of variance and Tukey test at 5% probability. It was possible to analyze which plant population did not suffer variations associated with straw. The average yield of soybeans was around 5 Mg ha-1, but there was no direct relationship with biomass production regardless of grass rest time. Plantability did not vary among the evaluated systems and was considered regular, around 65% uniformity.