Production simulation for wood assortment in Tectona grandis L. in the north region of the state of Mato Grosso

Abstract

The present study was developed with the objective of providing equations to estimate the volume, assortments (tapering functions) and the construction of site curves, seeking to forecast the growth and production of a Teak stand located in the municipality of Alta Floresta, Northern region of the state of Mato Grosso, using a growth and forest production simulator called SisTeca. 154 permanent plots were used, whose remedies totaled 909 observations covering ages 2 to 14 years, in addition to the cubing of 139 trees by the Smalian method. The Schumacher-Hall model was adjusted to estimate individual volumes, the fifth-degree taper function to estimate assortments and the Schumacher model for the construction of site curves. At the end, projections were made with SisTeca using the original equations (default) and inserting into the SisTeca the volume, tapering and site equations developed in this research. The adjusted volume, tapering and site equations for Teak stands in the Alta Floresta region, state of Mato Grosso, showed good results of adjustment and precision and are important tools for Teca, either to estimate current stocks or to be inserted in systems growth and production like SisTeca. The EMBRAPA simulator for Teca, when equipped with the dendrometric tools developed in the research, generated better prognosis, compared to the observed values from the plots available for the species in the region of Alta Floresta, state of Mato Grosso. Thus, the need to acquire more representative data for the species is emphasized, both in terms of age and site to develop robust growth and production systems and / or more efficient dendrometric tools to calibrate the SisTeca.

Keywords:
Teak; Modeling; Production