Demanda de força e de potência de tração de um conjunto trator-semeadora-adubadora em plantio direto de soja.

Abstract

This work aimed to analyze the fuel and oil consumption of a tractor-seeder-fertilizer under a no-till system of soy, in the areas of Dourados city, Brazil. The influence of the displacement speed (2.72, 4.85 e 5.91 km h-1), of the depth of soil cutting (58 and 62 mm) and of type of furrow opening mechanism (furrow plough and double wheel) were evaluated. The experiment was made as split-splot design, where units had the mechanisms of furrow opening, subunits were the displacement speeds and the depths of soil cutting, with three replicate, in randomly design. The furrow plough mechanism demanded larger slip, specific power and force of traction. No influence was observed of furrow opening mechanism on specific power, under the small depths of soil cutting. The furrow plough mechanism was increased as the depths of soil cutting increased. The specific force was decreased as the displacement speed of the machine increased.