天山云杉人工幼林相容性生物量模型

Study on the Compatible Biomass Model ofPicea schrenkiana Young Plantation

利用国内外常用的林木各分量生物量独立模型 ,即林木生物量相对生长模型 [W =a(D2 H ) b]研究了天山云杉林木各分量的生物量 ,并采用分级控制、比例分配的方法 ,构造了各分量的相容性生物量模型 .结果表明 :所构造的相容性生物量模型 ,不仅解决了各分量独立模型存在的各分量估计值与总量估计值不等的缺陷 ,而且估计精度并没有降低 。

The forest biomass is a major index to indicate forest productivity However,in old studies,each component model of biomass is independent,their plus is not equals their gross So,building compatible model has become a topic pattern in increasing interest among the related spheres of stand measurement and calculation And this paper focused on each component and gross of biomass to study their compatible Twelve 30 m×30 m plots in young Picea schrenkiana plantation which was planted in 1963 were investigated for selecting mean trees by measuring mean breast diameter and mean height of diameter grades of the plots Sixty six mean trees were cut,their trunk and branch and leaves were weighed Fifty trees were used for simulating the independent models of each component and the compatible model,the rest 16 trees from the 66 mean trees were used for checking the applicability of the models Based on the independent models of each component of biomass (D 2H) b] ,the compatible models of each component of tree for Picea schrenkiana were constructed by classification control and distribution in proportion The results showed that the constructed compatible models not only solved the shortcome about the simulation values of each component not to equalize in the independent models,but also not drop the simulation precision,on the contrary,raised roughly the simulation precision These results gave a new means to measure and calculate forest biomass which will provide theoretical basic and referenced foundation for the management of Picea schrenkiana plantation