福建桉树异速生长方程与生物量估算OA北大核心CSTPCD

The estimation of forest biomass at individual tree scale is the basis for the estimation of forest biomass at the regional scale.This paper aims at developing a reliable and effective allometric equation for Eucalyptus in Fujian in order to improve the estimation accuracy of Eucalyptus biomass in this area and to provide basic supporting data for the sustainable forestry development of Eucalyptus.This study takes Eucalyptus,a major fast-growing and productive tree species in Southern China,as the research object.Using 90 Eucalyptus woods harvested in the field,the partitioning of Eucalyptus biomass among organs are studied,the optimal allometric equations are constructed,and the Eucalyptus root/shoot ratios are calculated and applied to estimate Eucalyptus root biomass.Results show Eucalyptus has the following biomass allocation strategies:the biomass proportion of trunks increases with increasing stand age,while that of branches,leaves,and roots decreases.The most feasible and effective way to estimate Eucalyptus root biomass is to use root/shoot ratio data with stand age.In the construction of the allometric equation for Eucalyptus biomass,the multiplicative power equation is better than the linear equation,and the optimal independent variable varied by organ type.This paper provides data and theoretical support for the accurate estimation of Eucalyptus plantation biomass,and has implications for species growth patterns,survival strategies,and even forest ecological management.