Abstract

DIAZ-RIOS, Manuel de J. et al. Allometric equations for estimating biomass and carbon alder obtained by a nondestructive method. Rev. Mex. Cienc. Agríc [online]. 2016, vol.7, n.spe16, pp.3235-3249. ISSN 2007-0934.

In San Pablo Ixayoc, Texcoco, Mexico State, Mexico, 10 trees of alder (Alnus acuminata K.) of a gallery forest in order to determine their aerial biomass and carbon content using a nondestructive method they were selected. To determine the biomass of the cups: the branches were classified into four diametric categories, some branches by the glass were pruned and were separated into wood and leaves, these components were weighed individually and the average fresh weight (kg) was obtained by component and type branch. It was estimated the percentage of wood moisture (49%) and sheets (62%), the average biomass dry weight (kg) per component depending on the type of industry, and the information was extrapolated to the inventory of branches by the glass. To calculate the biomass of boles: B= DM(1/4π(DAP)2 . AFl . Ffp), was calculated: wood density (DM= 0.62 Mg m-3), volume of shafts, shaft heights clean (Afl) and form factor (Ffp= 0.66). Two models were used: Y= B0 + B1Xi (linear) and Y= b. Xk (exponential), the best model was the exponential. The allometric equations were expressed as B= 0.0012DAP1,7877 and CCA= 0.0006DAP1,7755, both with coefficients of determination R2= 0.95, where B is biomass (Mg; tons per cubic meter), DAP is diameter at breast height (cm) and CCA is carbon per tree (Mg). The percentage distribution of biomass was: 64.92, 27.06 and 8.02 and carbon: 65.12, 27.15 and 7.72 for stems, branches and leaves respectively.

Keywords : form factor; glass; gallery forest; stem biomass; wood density.