Determinação das características mecânicas de cepas de eucaliptos em áreas de reflorestamento.

Abstract

Actually, lack of technical assistance and proper equipments for stub elimination during soil preparation in minimum tillage process in agro-forest, had increased the cost of wood production in renewable forests. The main objective of the present was the mechanical characterization of the eucalyptus stub roots. That information’s could help in the design of equipment for stub elimination. From a seven years old stubs obtained in field the forces necessary to cut roots present at 400 mm depth and 500 mm from the stub center were determined. Also the evaluation of roots distribution and its area in this region, was detrermined. The test show that the power requirement to accomplish simultaneously lateral and subsuperficial cut of the roots in this area will be at the most of 36 kW. The force requirement in range 0,4 to 0,7 km h-1 is independent of the velocity. It was concluded that it is technically possible to design an equipment to eliminate the remaining stump to allow new tree planting.