Abstract

GARCIA CUEVAS, Xavier et al. Site index for commercial tree plantations of Cedrela odorata L. in Quintana Roo, Mexico. Rev. mex. de cienc. forestales [online]. 2021, vol.12, n.64, pp.92-114.  Epub May 21, 2021. ISSN 2007-1132.  https://doi.org/10.29298/rmcf.v12i64.793.

For a sustainable management of commercial forest plantations (CFP), it is essential to know the productive capacity of the site to estimate its profitability. Site quality, hereafter, Site Index (SI) is a reliable way to classify forest areas according to productivity. However, in Quintana Roo, the most of CFP do not have such information, so the aim of this study was to fit SI equations of CFP of Cedrela odorata in Quintana Roo State. For this purpose, 1 943 dominant height-age (Dh-E) data pairs were collected from temporary plots on plantations from 1 to 28 years old, three growth models were fitted to data in SAS 9.4®. According to the analysis, we used of the adjustment in the values of the root of the mean square of the error (RMSE), adjusted coefficient of determination (R 2 adj. ) and parameters significance, in addition to the bias ($\stackrel{-}{E}$) and aggregate deviation (DA %) for the estimates, the Weibull growth model was selected as the best for the construction of a guide curve and anamorphic and polymorphic growth curves for Dh. The base age (E 0 ) was defined at 25 years old and three IS classes were established at 14 m, 17 m and 20 m. Statistical results confirm that they can be reliably used to classify CFP based on productivity and to propose forestry treatments according to C. odorata in the state of Quintana Roo, Mexico.

Keywords : Station quality; red cedar; anamorphic curves; polymorphic curves; forest management; state of Quintana Roo.

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