Allometric Models for Estimating Aboveground Biomass in Short Rotation Crops of <i>Acacia</i> Species in Two Different Sites in Chile

Abstract

We evaluated the ability of different allometric models to estimate the biomass production of short-rotation woody crops of Acacia dealbata, A. mearnsii and A. melanoxylon. Models considered the adjustment and validation of biomass functions and biological restrictions, such as the use of additive components of the biomass (stem, branches, and leaves). Adjustments of linear and nonlinear models of the three acacia species—established in two locations and of three densities in southern Chile—were utilized. Systems of equations were adjusted to guarantee the addition of the biomass components and the trees’ total biomass. The selection of models was performed based on their goodness of fit and predictive quality. Methods that accounted for the correlation between biomass components granted an additively consistent equations system with efficient estimates and reliable prediction intervals.

Keywords

• short rotation woody crops
• <i>A. dealbata</i>
• <i>A. mearnsii</i>
• <i>A. melanoxylon</i>