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结合全国生态地理区域和行政区域,并兼顾立木材积表的建模总体划分,提出了全国立木生物量建模总体划分方案,将全部树种分为34个树种组,全国分为6大地理区域,共划分70个建模总体;通过对已有立木生物量数据进行建模分析,将立木生物量模型的预估精度确定为95%以上,同时根据变动系数分析结果提出合适的建模样本单元数应该在150以上,且要按划定的10个径阶均匀分配,保证每个径阶的样本单元数不少于15个;以第七次全国森林资源清查数据为基础,确定了每一个建模总体的样本结构,将样本单元数全部落实到了各省和各级径阶。研究成果可为推进全国森林生物量调查建模工作提供参考依据。
Combined with the national eco-geographical and administrative regions and taking into account the overall division of standing timber volume tables, the paper proposes a general plan of national tree biomass modeling. The whole tree species are divided into 34 tree species groups, which are divided into 6 major geographical regions, A total of 70 modeling models were divided. Based on the modeling analysis of the existing stand biomass data, the prediction accuracy of the stand biomass model was determined to be above 95%. At the same time, the appropriate modeling sample unit number Should be more than 150, and should be evenly distributed according to the designated 10 diameter classes, to ensure that each diameter of the sample unit number of not less than 15; based on the seventh national inventory of forest resources, identified each building Overall sample structure of the model, the number of all the units of the sample has been implemented in all provinces and at all levels. The research results can provide reference for promoting the modeling of forest biomass survey in China.