以敦化林业局2016年森林资源二类调查数据为基础,对全局各龄组各树种林木径级分布进行研究,分析其变化规律及原因.%Based on the investigation of forest resources in Dun-Hua Forestry Bureau in 2016,studied the distribution of forest tree diameter classes in different age groupsand analyzed the changes and caused.
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