MECANISMOS SULCADORES E VELOCIDADE DE SEMEADURA NA PLANTABILIDADE E PRODUTIVIDADE DA SOJA

FURROWING MECHANISMS AND DISPLACEMENT SPEED IN SOWING QUALITY AND SOYBEAN YIELD

Abstract

Mechanisms soil furrow and seeding speed are directly related to the quality of a crop implantation and consequently, its yield. This study evaluated furrows opening mechanism and displacement speed in sowing quality and yield soybean. The experiment was carried in the town of Dourados, in the state of Mato Grosso do Sul, Brazil, using soybean seeds of Intacta M6410 IPRO of Monsoy, sowing under no-tillage with for displacement speeds (4, 6, 8 e 10 km h^-1) and mechanisms soil furrow (furrow plough and furrow disk). The experiment was a complete randomized block, (4 x 2) factorial arrangement, with four repetitions. During sowing, data were collected for the placement depth of seeds, the longitudinal spacing uniformity of the soybean plants, the soybean number of bags and grain yield. Increase occurs of soybean depth of sowing with the increase of displacement speed of tractor-seeder set. Soybean sowing performed in intermediate speeds (6 e 8 km h^-1) hight provides normal and low double spacings, however without influence about the fails spacing. Displacement speed were not influence the longitudinal spacing uniformity of the plants in spacing fails, while the mechanisms soil furrow not influence the depth of sowing, nor the longitudinal spacing uniformity of the soybean plants. Number of bags and soybean grain yield vary depending on the type of mechanisms soil furrow and displacement speed of tractor-seeder set.