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文章分析了文登市封山育林１７年后林地植被盖度和多度、土壤肥力、林木生长量、赤松毛虫天敌等因子，认为林地开始转向良性循环。
The paper analyzes the factors such as vegetation coverage and abundance, soil fertility, tree growth, natural enemies of Cydia caterpitalii and other factors after 17 years of closed hillside afforestation in Wendeng. It is considered that the forestland has begun to turn into a virtuous cycle.