北京市大兴区毛白杨生物量模型的研建

以北京市大兴区毛白杨为研究对象，结合测量数据和统计学软件SPSS来拟合生物量模型，通过模型评价指标选取各器官的最优数学模型。模型共包括4部分，分别是：总量、树干、树枝和树叶，单位为kg。结果表明，建立的毛白杨各器官生物量模型预估精度达到97％以上。最终筛选出总量及各部分生物量模型分别是：总量：W=0．024（D^2H）^1.003；树干：W=0．016（D^2H）^1.007；树枝：W=0．006D^1.99H^1.002；树叶：W：0．002（D^2H）^0.975。由于分量生物量模型具有不相容性，因此本研究采用平差法即以总量按比例分配的方法解决生物量模型的兼容性问题。

The build study of Populus tomentosa biomoss modelin Beijing Daxing District

Taking Populus tomentosa in Daxing district of Beijing as a research object,this paper tried to construct phytomass models through measured data and SPSS and select the most optimized mathmatical model of each part based on model selection criteria,which included four parts of gross,trunk,branch and leaves with the unit being kg.The result indicated that the estimated accuracy of the established phytomass models of Populus tomentosa is more than 97%,with the biomass models of gross,trunk,branche and leave being W=0.024(D2H)1.003,W=0.016(D2H)1.007,W=0.006D1.99H1.002 and W=0.002(D2H)0.975 respectively.Moreover,with the incompatibility of each model,an adjustment method,was employed by prorating distribution to realize the compatibility of the models.