PERDA DE GRÃOS NA COLHEITA MECANIZADA DA SOJA

Abstract

Soybean (Glycine max) cultivation is one of the main sources of income in the country and the world, with its main derivatives being soybean oil, bran for animal supplementation, textured soybean protein, among many others. Grain harvesting, when carried out incorrectly, makes all its efficiency during the harvest unfeasible, causing a drop in productivity. With the specific purpose of demonstrating this loss, mechanized soybean harvesting (COCARI 2788) was compared depending on different speeds and machine models. Samples were collected at speeds of 3, 5 and 7 km h-1, track speed at 500 rpm and two machine models and years of manufacture, namely Case 7230 (year 2013/14) and Case 8230 (year 2016). All grain losses during harvest were evaluated, with samples collected from the left, right and center of the machine trail, in an area of 1 m². The statistical evaluation method was carried out using Anova, using the R software. Through the experiment carried out, it was observed that divergent speeds influence losses, as much as the difference between machines, with the worst performance at 7230, at a speed of 5 km h-1.