Analysis of productivity on complete tree harvesting system in north of the Goias State, Brazil

Abstract

This research had as objective to analysis the productivity in full tree harvesting system in a stand of eucalyptus to improve and provide the production system optimization. The study was developed in a forest company located in the North Goias State. The harvesting wood system consisted on the use of feller-buncher, skidder, grapple saw and forest loader. The technical of analysis the machines consisted on movement and time study for the continuous method, where the operations in work cycle. The productivity, mechanical availability and operational efficiency were determined. The results indicated that the forest loadder was machine with the lesser operational efficiency (40,3%). The lesser mechanical availability was the feller-buncher (47.1%), dere to bigger interruption occurred in working cycle. The grapple saw had in the highest productivity (84 m³ /hf). The regression analysis indicated that the feller-buncher productivity was influenced by distance and wood volume, while the skidder by distance and tree buncher volume and the grapple saw by wood volume.