VOLUMETRIC EQUATIONS FOR Calophyllum brasiliense CAMBESS IN THE SOUTH FROM TOCANTINS

Abstract

The objective of this work was to carry out the adjustment of mathematical models to estimate volume through data obtained from the cube of trees and forest inventories with continuous plots, to generate the equations that best represent the production of Calophyllum brasiliense of a company located in the municipality of Dueré in the southern region of the state of Tocantins. The database is composed of plantations with an initial spacing of 4.0 x 2.0 meters, implanted in 2009. The adjustment of the models was carried out by evaluating the adjusted coefficient of determination (R²aj) and the standard error of estimate (Syx%), Coefficient of variation (CV%), in addition to the residual distribution graphs. The model that best fitted was the Meyer model (modified), with a value of R²aj = 0.97; Syx% = 1.14 and CV% = 80. The average value for volume was 66.2778 m3/ha.