Projeção do estoque de carbono e análise da geração de créditos em povoamentos de eucalipto / Carbon stock projection and credit generation analysis in Eucalypt stands

AUTOR(ES)

Rodrigo Firmino da Silva

DATA DE PUBLICAÇÃO

2007

RESUMO

The objective of this study was to predict the volumetric production and carbon stock in tree stems in Eucalypt stands, by adjusting the growth and production models as well as to economically evaluate the inclusion of carbon credits in forest projects by using quantitative criteria. Thus, data from Eucalyptus grandis stands, located in Guanhães-Minas Gerais, were used. Based on the volume and carbon equations for the stems of individual trees and for 95 permanent plots, the Clutter growth and production model (1963) was adjusted for volumetric production and carbon stock projection. Productive capacity classification was obtained by means of the local indexes, by the guide-curve method. Determination of the technical age of cutting (ITC s), considering three productivity classes and volumetric and carbon stocks per hectare, was carried out based on mean maximum annual increments (MAI). Economic evaluation and economic rotation determination were carried out using quantitative criteria: equivalent annual value, present net value, internal return rate, benefit/cost ratio, and expected land values and a discount rate of 10% per year. After the analyses, it was verified that: the growth and production model proposed by Clutter (1963) was adequate to predict future volumetric production and carbon stock, maintaining coherence between harvesting technical ages and yield capacities; technical ages of cutting (ITC s) were practically the same for volumetric production and carbon stock; there is a direct relation, in the order of 86.15%, between wood production in m/ha, and carbon stock in ton of CO2/ha; the Reduced Emission Certificate (CER s) contribute positively for the economic viability of forest projects in places with low productivity ; and, the sensitivity analysis showed that wood price variation was that most affected the economic viability of the projects, in contrast with the RECs, which had little influence.

ASSUNTO(S)

forest production eucalypt growth sequestro de carbono carbon sequestration produção florestal crescimento manejo florestal eucalipto

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