基于非线性度量误差的马尾松相容性立木生物量模型

Compatibility single-tree biomass model for Pinus massoniana stands based on nonlinear measurement error

以南方马尾松地上生物量数据为例,通过利用非线性度量误差模型方法,研究建立了地上生物量与树干、树冠的相容性联立方程组模型,并对模型的精度和适用性进行了检验。研究结果表明:方程最大平均绝对误差和方程最大平均相对误差均趋于无穷小,树干生物量Y1和树冠生物量Y2的确定系数分别为0.9502和0.8807,模型精度比较高,适用性较好。研究结果有助于为建立相容性立木生物量模型提供新方法。

By taking the data of Pinus massoniana stands in south China as the examples,using the nonlinear measurement error model,the simultaneous equation models that the aboveground biomass tree trunks,crowns variables are compatible were set up,and the accuracy and applicability of models were verified.The results show that the model precision was high and the accuracy was well and the maximum absolute error and relative error were close to zero,the determination coefficient of stem wood biomass Y1 and tree crown biomass Y2were 0.9502 and 0.8807 respectively.The results would be help to provide a new method for establishing the model of compatibility single-tree biomass stands.