The plus trees selection of Q. variabilis should use the small sample plot method and the standard is different in each region.
栓皮栎优树选择应采用小样地法，各地区选择标准不同。
By the statistical analysis method, the authors researched the growth model and cutting age of masson pine natural forest with the sample plot inventory data.
根据标准地调查资料，应用统计分析方法研究生长模型，并结合森林经营实际确定采伐年龄。
The method of the standard sample-plot combined with remote sensing and GIS are employed.
研究方法：用标准样地结合遥感、GIS等手段构建体系。
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