Studies on Biomass Models of Understory Shrubs in Larix olgensis Herry.Plantation
Shrub biomass is an important index of weighing the productivity of vegetation.Based on the biomass data of the field investigation in Larix olgensis Herry.plantation,the best biomass prediction model was established by mathematical modelling.The results showed that,quadratic polynomial and power function were the optimal biomass estimation models of shrub species,and the composite factors,i.e.,steam area,trunk volume,canopy projection area,and crown projection volume,were the optimal model parameters,with a high correlation.The biomass model of the shrub layer was:WT=9.00× 10-6V2D+0.389VD+57.598(VD said trunk volume),with a high R2 value (0.933).