与材积兼容的生物量模型的建立 |
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引用本文: | 张会儒,唐守正,王奉瑜.与材积兼容的生物量模型的建立[J].林业科学研究,1999,12(1):2. |
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作者姓名: | 张会儒 唐守正 王奉瑜 |
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作者单位: | 中国林业科学研究院资源信息研究所,100091,北京; |
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摘 要: | Establishing biomass
models is a major way of biomass estimate.To establish biomass model compatible with
volume table is the base of realizing the combination of forest biomass survey and growing
stock invertory.Based on this point,the progressive variable selection method is used
to establish biomass model compatible with volume table for Larix olgensis and Tilia
amurensis,and weighted least squares method is used to estimate parameters for clearing
up phenomenon of non-homogeneous variance.In the meantime,the paper presented five
indices for evaluation of models,they are coefficient of variation for parameters Cvi,
total relative error Er, average relative error Em average
absolute value of relative error Ea and prediction precision P. All the
results show that biomass models established in this paper not only realize compatibility
with volume table,but also get remarkable improvement in estimate effect and prediction
precision comparing with previous model CAR.According to the results,some reference
models are given.
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