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以吉林省汪清林业局金沟岭林场云冷杉过伐林112块固定样地1987—2003年间4次调查数据为依据,分析其株数径阶分布特点,并用Weibull分布和负指数分布描述其直径结构。研究表明:该林分直径结构为异龄林结构;Weibull分布函数和负指数分布函数均能表达云冷杉过伐林直径结构,Weibull分布函数拟合的效果比负指数分布好。
Based on the four survey data from 112 fixed sites of over-deforested forest in Jingouling Forest Farm of Wangqing Forestry Bureau in Jilin Province from 1987 to 2003, the diameter-order distribution of the number of stalks was analyzed and its diameter structure was described by Weibull distribution and negative exponential distribution . The results showed that the diameter structure of the stand was an anonymous forest structure. Both the Weibull distribution function and the negative exponential distribution function could express the diameter of the over-cut forest diameter structure. The Weibull distribution function fitted better than the negative exponential distribution.