Emprego de um modelo de crescimento e produ??o em povoamentos desbastados de eucalipto

摘要

The objective of the present study was to evaluate the applicability of the Clutter model in thinned eucalypt stands. The study was developed with data from the Copener Florestal, Bahia Pulp Enterprise, located in the municipality of Alagoinhas, Bahia, Brazil. Data came from a thinning experiment established in eucalypt stands using a randomized block design with four treatments and three repetitions, each one in a different place, totaling 48 plots with a mean area of 2,600 m2 each. The plots were measured at 27, 40, 50, 58, 61 and 76 months of age, and the thinning was carried out at 58 months. For model adjustment, a system of simultaneous equations was used with stand information such as basal area, volume, age and site index. From the model adjustment, a yield table with variable density was built, and the technical cutting age was determined for various thinning intensities. Simulations were carried out with the yield table. It was concluded that the Clutter model was efficient to predict the present and future yields of the thinned eucalypt stands, showing its usefulness in the analysis of alternative managements, such as the technical cutting age determination for various site indexes and thinning intensities.