Effect of Environment on Biomass of Major Ecological Forest in Zhejiang

Study on effect of environment on biomass of major ecological forest in Zhejiang province with investigation data of 854 typical sample plots from 2 million hectares forest showed that current biomass had close relation with geographical properties like land form,aspect,gradient,etc.and had normally negative relation with average growth,decreased with relief.Mean biomass of forest at northwest was greater than at south,southeast and southwest,greater at heavy slope than at steep slope,declivity,flat gradient and dangerous slope,greater at higher slope than at middle slope,ridge and lower slope.Thickness of soil had significant positive effect on biomass of the forest,same as the mean annual biomass.