Requerimento de força de tração em operação de semeadura direta.

Abstract

The present work objectified to determine the solicitation potency requested by a seeder in function of its opening mechanisms. The experiment was installed and developed in the Experimental Nucleus of Agricultural Engineering - NEEA, belonging the State University of the West of Paraná - UNIOESTE, Cascavel Campus. The soil of the experimental area was classified like Latossolo Roxo Distrófico, relief slightly inclined and loamy texture. The experimental design was composed by four treatments, being used two opening mechanisms (staggered double-disc and hoe opener) and two travel speeds (V1=5,2 and V2=8,4 km.h-1). The evaluated parameters were travel speed, solicitation traction force in the bar and slippage in the wheeled motor. The average force solicitation in the bar was 7,78 kN to the staggered double-disc opener mechanism and 13,14 kN for the mechanism type hoe opener. The travel speed also suffered a variation in the order of approximately 4% due to the increase of the slippage provoked by the increase of the requested force. The hoe opener mechanism is responsible for an increase in the potency solicitation in the traction bar in about 62%