Crescimento e produção de Tectona Grandis Linn F., em povoamentos jovens de duas regiões do estado de Mato Grosso - Brasil

Abstract

The Tectona grandis Linn F. was introduced in Mato Grosso in the end of the sixties and new planting is made each year in the State with the aim of replacing native woods of noble use. Beyond the expectation of great future gains the teak plantations are, most of the time, made in the mosaic system. This system is certainly the greatest advantage of this wood species, which is conquering more space each year in the Mato Grosso economical set. For this project, information about teak was acquired from the cities of Santo Antonio do Leverger and Brasnorte. In this places, the plantations are the propriety of Brasteca e Berneck companies, respectively. These plantations were young - less than 11 years old. And the possibility of short crop allows the discussion of the importance of processing wood in small dimensions. Since there was no production planning of Tectona grandis in Mato Grosso, which would allow rapid wood stock determination, the need to study the structuring of production for this species arose. This project also aimed at establishing: the study of hypsometric relationship; the study of the site and the determination of the site index; the study of diameter, height, base area and volume growth by year and by hectare; the development of the artificial form factor; the making of volume tables, form factor tables and yield tables for regional use. The results achieved in this work were the followings: to model the growth, the Chapman-Richard s equation described efficiently the dominate height variable evolution within the time span analyzed. The model h = 1,390 − 0,063 ⋅ d + 0,448 ⋅ ln 2 d , was selected to explain the relationship between height and diameter. The volume was modeled with the equation log(v) = −4,141 + 1,781 ⋅ log(d ) + 0,974 ⋅ log(h). The following equation was that showed the best adjustment for artificial form factor ( ) ⎟⎠ ⎞ ⎜⎝ ⎛ ⋅ ⋅ + ⎟ ⎟⎠ ⎞ ⎜ ⎜⎝ ⎛ ⋅ − ⎟ ⎟⎠⎞⎜⎜⎝ ⎛= + ⋅d h ddddln f 0,774 0,697 ln 0,647 ln 0,199 ln 1 20,120,51,3 Finally, six curves of site index, between 10 and 20, was needed to describe the variation of the dominate height growth over the age in the index-age of 10 years. As a conclusion it was verified a greater growth of teak in the state of Mato Grosso in comparison with other countries. This demonstrates the importance of teak not only for the state of Mato Grosso but for the whole country.