Abstract

MARTINEZ-LOPEZ, Joel  and  ACOSTA-RAMOS, Alejandra. Estimation of diameter, height and volume from the stump diameter for Quercus laurina, at Ixtlan, Oaxaca, Mexico. Madera bosques [online]. 2014, vol.20, n.1, pp.59-70. ISSN 2448-7597.

In this paper, three equations were generated to estimate the normal diameter, height and total volume from stump diameter for Quercus laurina stands in Ixtlan de Juarez, Oaxaca, with a sample of 54 trees. Linear and nonlinear models were adjusted to the database to obtain the most reliable equation to the functional relationship: (a) normal diameter - stump diameter, (b) total height - stump diameter and (c) total volume-stump diameter. The criteria for defining the adjustment in all three cases was based on: normal and adjusted coefficient of determination, mean square error, P-value, coefficient of variation, and sum and dispersion of residuals against predicted values. The model with the highest goodness of fit for the estimated normal diameter based on the diameter of the stump was the simple linear regression model, and in the other two cases, it was the potential model. With these equations, it is possible to accurately estimate the dependent variables values and evaluate different scenarios in areas affected by natural or anthropogenic phenomena.

Keywords : Estimator; variance homogeneity; prediction equations; linear models; non-linear models.

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