Additive biomass equations for small diameter trees of temperate mixed deciduous forests

The carbon stored in small diameter trees of temperate forests has been ignored in most studies and there is a lack of biomass equations for this component of forests. We harvested nine main tree species at sapling stage (dbh?NSUR), additive species-independent equations were developed for estimation of biomass of foliage, branch, bole, and total based on dbh, height, and wood density as predictors. Results showed that wood density and height had high effects on equations performance except for the foliage equations. Comparing actual and estimated biomass for each species revealed that these equations can be used for new species in similar forests.