Avaliação técnica e econômica do corte seletivo de Tectona grandis L. f. com Harvester

Abstract

The knowledge of the operational income and the cost of production of the machines in different operational situations is of extreme importance for the forestry sector. In this context, the objective of the present work was to evaluate the technical and economic indicators of the selective cutting of Tectona grandis with harvester. The technical analysis included a study of times and movements, productivity, operational efficiency and mechanical availability. To estimate the productivity of the machine, a statistical regression model was obtained, which tested the productivity correlation as a function of the average individual volume of the tree. The economic analysis encompassed the parameters of operating cost and production cost. The average productivity found was 11.83 m³. he-1, with an operational efficiency of 71.5% and mechanical availability of 82.83%. The total operational cost sampled was R $ 209.80 per effective working hour. The fixed costs corresponded to 31.2% and the variables to 68.8% of the total costs. The cost of production was R $ 26.10 m³.-1 produced. The results of the technical and economic parameters showed that the individual volume directly influenced harvester productivity.