Demanda energética do conjunto trator-semeadora-adubadora de precisão em preparo convencional.

Abstract

Evaluation of the energy demand of the group tractor-seeder it is done exactly by the great variation that can happen in the different soils and conditions of each Brazil place, and also for the great amount of tractors and existent seeders. The objective of the present work was to evaluate the energy demand of the group tractor-seeder in conventional tillage in function of the displacement speed and of the pressure of the tire of the motive wheel of the seeder. The work was driven in the Laboratory of Machines and Agricultural Mechanization - LAMMA of the Department of Rural Engineering of UNESP of Jaboticabal (SP). The experiment was arranged in completely randomized in factorial array 2 x 2 with 5 repetitions. For the collection and storage of data was used a tractor VALTRA BM100, scored. Were measured: draft force for line, drawbar power for line, hourly and area consumption, consumption in mass, and specific consumption the fuel. The displacement speed just influenced the fuel consumption for area and specific, because it is related with the speed. The pressure in the tire of the motive wheel altered the potency for line being the largest pressure a larger potency for line. The pressure affected all the fuel consumptions significantly and the largest pressure resulted in smaller consumptions.