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造林密度,更新标准,抚育间伐强度,都要求适于林分优质、高产的株数标准。而森林的自然稀疏过程,则反映着不同年龄阶段的林分株数结构和动态规律,是寻求最优株数标准的借鉴。关于云南松自然稀疏规律的研究,事前并无统一的研究计划。自1962年云南省林业研究所与云南锡业公司合组间伐实验,到1965年中国林业科学研究院组织金沙江林区综合考察,研究云南松更新标准,直至1976年云南省林科所与省森林资源管理处共同研制
Afforestation density, updated standards, tending thinning intensity, are required for the forest quality, high yield number of standards. However, the natural sparse process of forest reflects the structure and dynamic rules of the number of branches in different age stages, which is the reference for seeking the optimal number of trees. There is no unified research plan on the natural sparse rules of Pinus yunnanensis. Since 1962, Yunnan Forestry Research Institute and Yunnan Tin Company thinning experiment, to 1965 China Academy of Forestry organized a comprehensive inspection of the Jinsha River forest, research Yunnan pine renewal standards until 1976 Yunnan Forestry Branch and the province Forest Resources Management jointly developed