Estudos silviculturais de uma população natural de Copaifera multijuga Hayne-Leguminosae, na Amazônia Central. 2 - Produção de óleo-resina

Abstract

The author describes the oil-resin production of 82 selected trees of Copaiba (Copaifera multijuga Hayne) in two different soils (distrofic yellow latosol: clay and sand textures) in the Ducke Forest Reserve - Central Amazon, during five successive collections. He provides some dendrological Information and the mean oil-resin production in each extraction. The greater oil-resin mean production per tree was found In clay texture soil with 235,702 ml. The tree with maximum oil volume, produced 3,500 ml also In clay texture soil. The oil-resin production seems to be commercialy satisfatory if the utilization will be for medicinal purposes, when a hight oil price could justify the explotation costs. For energetical finalities as a diesel substitute, it will be better the establishment of industrial plantations using seeds from mother-trees. An analysis of linear correlation, between the accumulated oil production and the diameter at breast height, total height and crown diameter, gave a correlation coefficient of r1 = 0,162; r2 = 0,184 e r3 = 0,212, respectively, which are not statistically significant. The author believes that successive oil extractions from the same tree are possible and the best time for collection seems to be during the ranny seasan.