Quantificação do estoque de carbono e avaliação econômica de alternativas de uso de um povoamento de eucalipto / Carbon stock quantification and economic evaluation of use alternatives in a eucalyptus stand

AUTOR(ES)
DATA DE PUBLICAÇÃO

2004

RESUMO

This study aimed to quantify wood stock for charcoal and sawmill; biomass stock expressed in carbon tons in the different sectors of a Eucalyptus stand; and to economically evaluate alternatives for inserting forest stands into the Clean Development Mechanisms and carbon credit trade. Thus, a 6 year - old Eucalyptus grandis forest inventory was carried out in Viçosa, Minas Gerais, with wood volumetric estimates per hectare for charcoal and sawmill and carbon stock mean estimates per hectare being obtained in different forest sectors (aerial part, organic manta and roots). The quantitative criteria considered in the economic analysis were: Liquid Present Value (LPV), Return Internal Rate (RIR), Land Expected Value (LEV). The discount rate considered was 10% per year. After the analyses, it was verified that the stem is the tree component that most contributes, on average, to carbon total in the aerial part (81.84%), followed by the bark (8.05%), branches (7.74%) and leaves (2.57%). In the stand studied, 47.7 tons of carbon per hectare are stocked in the aerial part of the trees; 14.71 in the roots; and 8.72 in the organic manta, totaling 71.13 tons of carbon total per hectare. For a total volume of 204.09 m3/ha, considering both wood uses (sawmill and charcoal), 62.52% would be for charcoal production and 37.48% for sawmill. Taking into account cost structure and revenues adopted in this study and a six - year plan, wood production exclusively for carbon credit trade (project 3), without taking into account final wood use, is economically viable, according to the projects quantitative criteria of evaluation (LPV, RIR and LEV), provided the carbon ton is sold for US$ 10.07. The use of wood for sawmill and charcoal (project 2) allows higher added values, rendering the undertaking more economically attractive. Carbon credit trade (projects 4 and 5) renders the undertaking even more attractive, especially because the revenue considered at the beginning of the project is positively reflected in the economic evaluation criteria.

ASSUNTO(S)

inventário florestal eucalyptus manejo florestal forest stands eucalipto biomassa biomass mensuração florestal forest management povoamento manejo florestal forest measuring forest inventory

ACESSO AO ARTIGO

Documentos Relacionados