Generalized above-ground biomass equations for two main species in northeast China

Individual tree biomass equations have been frequently used in ecological and forestry research over the last 60 years. They represent a powerful tool to understand forest productivity, nutrient cycling, and carbon sequestration, and they are used to estimate other structural and functional characteristics of forest ecosystems. Current attempts to develop above-ground biomass equations for Larix forests in northeast China have been mainly focused on only one species or applied to the genus Larix as a whole. In this study, a total of nine tree variables that were able to predict above-ground biomass in Larix species were examined using biomass equations. On the basis of the results, the trivariate generalized biomass equation that considers tree species, tree origin, and region was believed to be the best option for estimating the biomass of L. olgensis and L. gmelinii.