Abstract

GUZMAN SANTIAGO, Juan Carlos et al. Height-diameter relation for Abies religiosa Kunth Schltdl. & Cham. in the center and south of the Mexico. Rev. mex. de cienc. forestales [online]. 2019, vol.10, n.52, pp.99-120. ISSN 2007-1132.  https://doi.org/10.29298/rmcf.v10i52.483.

The total height of the trees is an important variable in forestry and forest management; however, its measurement in the field is difficult and expensive. The goal of this research was to develop a height-diameter equation that can accurately estimate the height of Abies religiosa trees in the center and south of the country. The local equations were adjusted using a sample size of 2 747 data, which are sufficient to describe the behavior of the curves on the natural variability of the total height of the trees. For the selection of the best model, the following criteria were established: adjusted coefficient of determination, bias, mean error, and graphical and numerical analyses of waste. The explanation of the independent variables of each model was highly acceptable, since they were all superior (adjR2 = 0.96), in addition to presenting errors (RMSE) below 0.44 meters and with near-zero biases. Combined with the above, the model of Bates and Watts was selected through graphical analysis. This type of equation can be applied to the different forest management units (Umafores) of the country for forest inventory purposes, since it reduces the time and cost while minimizing field errors.

Keywords : Abies religiosa; total height; local equations; forest management; model of Bates and Watts; height:diameter ratio.

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