Ronaldo Drescher

Capacidade produtiva local de Tectona grandis em Monte Dourado, Estado do Pará, Brasil

The study aims to determine the local productive capacity of teak in Monte Dourado, Para State, Brazil, with the analysis of site index curves. The data were obtained by stem analysis of ten dominant trees in a stand with 26 years of age. Were adjusted ten regression models and the criterion for selection followed the lowest standard error of estimate, the highest adjusted coefficient of determination, the significance of F test and of regression coefficients and graphical analysis of the residuals. The site index curves were built by the guide-curve method. The Spillman model present the best fit, by which were generated three curves of site index from 16m to 24m, at 26 years of index-age. The region of Monte Dourado - PA showed a productive potential for the development of teak.

Capacidade produtiva de Tectona grandis L.f no Sudoeste de Mato Grosso

The knowledge of the site is necessary to understand the production and forest management. The objective of this study was to determine the productive capacity of Teak in southwestern Mato Grosso State, through the analysis of site index curves, to forest harvesting. The data were collected in permanent plots and the stem analysis of 32 dominant trees of two stands, 33 and 34 years old. Eight site index models were adjusted and the selection criteria followed the lowest standard deviation, the highest adjusted coefficient of determination, F test value and the absence of trends in the graphical analysis of the residuals. The site index curves were prepared by the method of the guide curve. Soil samples were collected for physical analysis and macronutrients. The model presented by Hoerl had the best fit and it was found that the database follows an anamorphic pattern, thus, the growing trend is the same between the curves. Four site index curves were generated in an age-index of 30 years and three productivity classes of Teak were established. The soil characteristics of the region are favorable to the cultivation of Teak and the curves illustrate the productive potential for the species.