Desempenho de sulcadores na semeadura da soja em solo com diferentes níveis de compactação

Abstract

For many years, soybean has been the main oil crop produced and consumed in the world. The growth of soybean crop is related to scientific advances and increments in technology for productive sector. The Tillage System's adoption is responsible for one of the greatest advances in Brazilian agriculture. The present work aimed to evaluate the performance of trencher in a seeder on soybean implantation in different compression levels. The experiment was conducted in Rhodic Hapludox soil, at experimental area of Universidade Tecnologica Federal do Parana - Campus Pato Branco. Treatments were composed in a combination of four compression levels on soil (N0; N2; N4 and N6), and two trencher mechanisms (double disc and planter shank) on a zero tillage seeder. Soil density, mechanic soil resistance to penetration, seed depth, moved soil, index of plant emergence, initial plant booth, a thousand grain weight, and soybean yield. The major soil densities were founded in the soil that N6, presenting significant differences only in the treatment N0. The compression levels influenced significantly only in index of plant emergence, and a thousand grain weight. The trencher mechanisms influenced only seed depth and soybean yield. The initial plant booth and moved soil weren't suffered influence about the evaluations.