Quantificação e construção de uma tabela de volume comercial para estimação dos desperdícios de exploração florestal da espécie Millettia Stuhlmannii na Concessão TCT

Abstract

Based on a sampling of 63 trees in the TCT concession area (Púngue and Zángué) the volume of forestry waste was quantified and a table of volume of an entry was established (as a function of diameter at breast height) for the species Millettia stuhlmannii (Panga-panga. This study broke down forestry waste according to the diameter of the branches in categories a1 (20 to 30 cm), a2 (10 to 20 cm) and a3 (6 to 10 cm). The percentage of waste volume for each category in relation to the total volume of the tree was 14% for a1, 9% for a2 and 2% for a3. About 65% of the total volume of the tree corresponded to the commercial volume (stem and commercial branch), 25% to the volume of usable waste and 10% to the volume of unusable waste. The commercial volume corresponded to 72% of the total volume of the usable tree (up to 6 cm in diameter of the branches) and 28% of the volume of usable waste (6 to 30 cm in diameter of the branches). The linear function (volume equation) was selected by aggression, for the construction of the volume table and the subsequent estimation of the commercial volume (v) of the tree, as a function of the diameter at breast height (d): V=-2.478 +0.084d;R2=74.99%. In general, waste from forestry exports with diameters between 6 and 30 cm can be used for domestic use, turning into sculptures, sawn wood, wood fuels and precarious construction material. With the knowledge of the commercial volume of the tree, it is possible to estimate the volume of waste.