Abstract

GOMEZ-DIAZ, Jesús D. et al. Allometric equations for estimating the above-ground biomass and carbon in Quercus magnoliaefolia Née. Rev. Chapingo ser. cienc. for. ambient [online]. 2011, vol.17, n.2, pp.261-272. ISSN 2007-4018.  https://doi.org/10.5154/r.rchscfa.2010.11.117.

At the El Zapote ejido in the "Sierra de Huautla" Biosphere Reserve in the state of Morelos, Mexico, twelve Quercus magnoliaefolia Née trees were selected and their above-ground biomass determined. The proposed allometric model was expressed as: B = 0.0345 * DBH^2.9334, where B is biomass (kg) and DBH is diameter at breast height (cm), with a coefficient of determination (R²= 0.98; PO.001). In addition, above-ground biomass was estimated by a multiple linear regression based on basal area (BA), specific gravity of wood (SGW) and tree height (H). A high proportion of the biomass variation was explained by basal area alone. SGW and H did not significantly increase the accuracy of the models. The average percentage of carbon in Q. magnoliaefolia trees was 47.14 with values of 46.29 % for the bole, 46.83 % for branches and 48.31 % for foliage. The average proportion of the components of the species studied was 62.5 % for the bole, 27.8 % for branches and 9.6 % for foliage.

Keywords : Allometric equations; Quercus magnoliaefolia; above-ground biomass; wood specific density.