长白落叶松林下灌木生物量模型研究

Studies on Biomass Models of Understory Shrubs in Larix olgensis Herry. Plantation

以长白落叶松人工林林下灌木为研究对象,采用数学模拟的方法,以实测生物量数据为基础,构建灌木层最佳生物量预测回归模型。结果表明:林下常见灌木单株生物量模型以二次多项式及乘幂方程为最佳估算模型,以复合因子基径面积、植干体积、植冠面积及植冠投影体积为最佳模型参数;灌木层混合生物量(WT)模型以复合因子植干体积(VD)为最佳模型参数,其模型方程为WT=9.00×10-6 V2D+0.389VD+57.598(R2=0.933)。

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）.