Determinación de una función de ahusamiento para el cálculo de volumen en plantaciones de Pinus patula, pertenecientes a la empresa Aglomerados Cotopaxi S.A., cantón Latacunga, provincia de Cotopaxi.

Abstract

The present investigation proposes: To determine a tapering function for the calculation of volume in plantations of Pimus patula, belonging to the company AGLOMERADOS COTOPAXI S.A., Latacunga canton, Cotopaxi province; various variables were used to estimate the diameter at different heights of the shaft, the commercial and total volume. 37 trees were harvested and measured; The overlapping logs method was used in the cubing, which allows total and partial volumes to be obtained more precisely. The database was used to adjust 3 compatible taper and volume models with and without bark respectively. For the adjustment of the volume and taper functions, 981 pairs of diameter data with and without bark, section length, total height were used. The functions were adjusted by means of simultaneous estimation based on the complete information of ordinary Ieast squares (OLS), in linear and non-linear regression. The goodness of fit tests consisted of comparing the statistics; root of the mean square of the error (REMC), coeflicient of determination (R2), the mean bias of the crror (E), including the Akaike Information Criterion (AIC). The behavior of each taper function developed to predict fustale diameters and commercial volumes was also evaluated. The results showed that the models that best predict the volume and the dimetric profile were the Cielito 1 models with and without bark, respectively.