Of the three selected combination variables ( D2H , PH , and CH ) for establishing biomass estimation models , CH is the most suitable for undergrowth shrub biomass estimation than the others .
灌木生物量回归方程所选取的3个自变量D2H、CH和PH中，CH与灌木生物量的相关性和以CH为自变量的线性回归方程的拟合度较其他2个变量好。
d2h