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在调查攀西地区三条江河（安宁河、雅砻江、金沙江）８８个标准地的基础上，通过统计分析，揭示出云南松低效林分的结构，提出低效林的辩识类型和相应的改造措施，可以应用于攀西地区长江上游低效防护林改造，有较强的实用性
Based on the survey of 88 standard plots of three rivers (Anning River, Yalong River and Jinsha River) in Panxi area, the structure of inefficient stands of Pinus yunnanensis was revealed through statistical analysis, The corresponding transformation measures can be applied to the transformation of the inefficient shelterbelt in the upper reaches of the Yangtze River in Panxi, so it has strong practicability