Caracterização dendrométrica e avaliação econômica de povoamentos de eucalipto para multiprodutos

• Autor(a) principal: Santos, Felipe Rodrigues
• Data de Publicação: 2010
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Espírito Santo (riUfes)
• Texto Completo: http://repositorio.ufes.br/handle/10/5794
• topic: Planted forest; Forest yield; Taper; Assortments; Floresta plantada; Produção florestal; Afilamento; Sortimentos; Recursos Florestais e Engenharia Florestal; Florestas - Administração; Economia florestal; Eucalipto; Florestas - Uso múltiplo; 630

This case study aimed to obtain information for the production of four clones Eucalyptus stands; to evaluate taper functions and quantify the wood to use single and multiproduct; economically evaluate the potential use of wood, and support for decision-making entrepreneurs interested in investing in the forestry of Eucalyptus. Four stands of Eucalyptus hybrid clones, aged 77 (stand 1), 72 (stand 2), 53 (stand 3) and 40 months (stand 4), located in the town of Jerônimo Monteiro, ES, were surveyed with random of 10 plots in each stand, measuring variables CAP and H. Trees were scaled and obtained the volume by Smalian s formula. Hypsometric and volume models were adjusted and calculated the mean diameter, quadratic mean diameter, basal area per hectare and average height for each stand. Then the taper models were adjusted in its original form: Kozak et al. (1969), Demaerschalk (1972), Ormerod (1973) and Schöepfer (1966). The selection of models to estimate the commercial height in the diameters 14, 12, 10, 8, 7 and 6 cm and trade volume in the diameter 14, 7 and 6 cm was due to the application of statistical criteria in conjunction with the graphic analysis of residues. In stands 1, 2 and 3 were determined use single products for pulp and energy, and the stand 4 for energy, as well as the combined production of these uses with the possibility that some of the stem for fencepost. Thus, were determined the production combined of pulp and fencepost for stands 1, 2 and 3, and energy and fencepost to the stand 4. For the economic evaluation were applied the methods NPV, EPB and APC. It was observed that the mean diameter, quadratic mean diameter and basal area were directly related with age. The results of the adjustment of the models showed a difference in the profile of the stem between the stands. The use of wood of single use for pulp was higher in stand 1 (97%), followed by stand 3 (90%) and 2 (80%). For energy, the proportion was higher in stands 1 and 4 (99 and 94%, respectively) compared to 2 and 3 (86 and 91%, respectively). For multiproduct, it was observed that stands 3 and 4 had a higher proportion of use of wood for fencepost in relation to pulp and energy. The use of wood for energy has proven to be uneconomical in all situations evaluated. Already, for cellulose, in a low interest rate, proved to be economically viable. However, the stands 2 and 3 were more sensitive to variation in the interest rate in relation to stand 1. The use of wood for multiproduct was more viable alternative to the four stands. The APC was sensitive for changes in age, interest rate and use of wood