PLANEJAMENTO E OTIMIZAÇÃO DE PLANTIOS DE Pinus taeda L. NA REGIÃO OESTE DO ESTADO DE SANTA CATARINA, BRASIL

Abstract

This study aimed to carry out long-term planning in areas of Pinus taeda plantations, with different ages, in the western region of the State of Santa Catarina, and in this way regulate the production, serving wood consumption demands. The data comes from Pinus taeda plantations of the company ADAMI S/A with headquarters in Caçador - SC. The work was divided into three chapters, in Chapter I sites curves were prepared for productive classification. Five models of sites were adjusted and Prodan model was selected. In addition, identity tests demonstrated that sites curves differ for the two regions studied, called Chapecozinho Block (A), and Cachoeira Block (B). Thus, two tables of limits of sites classes were made, and so the projects belonging to the forest register of the company regarding the site index were classified. In Chapter II models taper and volume were evaluated, the models were adjusted in the following ways: (1) to the data set of cubed trees, (2) stratifying the data by Chapecozinho Block (A) and Cachoeira Block (B), and (3) within each block the data were stratified by age classes. For the dispersion of waste and analyses of standard error of the estimate in percentage, the data stratification in age classes has demonstrated better itself. In Chapter III was carried out the planning in a horizon of twenty years for Pinus taeda forests, using the variables evaluated in the previous chapters and optimizing the NPV considering the minimum production restriction of 400,000 m³. The total average NPV was R$ 10,508.69, always meeting the minimum production constraint, but with production considered high in the early years of the horizon of planning, so that it could verify the offer of different assortments by year of planning, highlighting the assortments of larger log diameter classes in the first year, and over the horizon of planning, in that the forest is regulated, it was observed that the assortments SIII (16-23 cm) and SIV (8 - 16 cm) predominated.