In this paper the natural secondary broadleaved forests in Yaodu Township, Dongzhi County were the study objects and the diameter structure data of different stands were obtained by surveying standard plots. Fitting diameter distributions of different stands were carried out with 3-parameter Weibull Distribution and compared with actual plants in the stands. The results showed that fitting diameter distributions of different secondary broadleaved forest stands with 3-parameter Weibull Distribution had good effects, the location parameter (a) was between 7 and 15, the scale parameter (b) was between 7.17 and 9.12 and the form index (c) was between 0.8495-0.9256. The study results could be practically applied in forest resources asset survey and evaluation and provide reference for harvest estimation of the stands and forest asset evaluation.%本文以天然次生阔叶林为研究对象,通过标准地调查获取不同林分直径结构数据,利用三参数Weibull分布拟合不同林分直径分布,并与实际林木株数进行比较.结果表明:三参数Weibull分布拟合不同次生阔叶林林分直径分布效果良好,林分位置参数(a)在7耀15之间,尺度参数(b)在为7.17耀9.12之间,形状指数(c)在0.849 5耀0.925 6之间.该研究结果可以实际应用于森林资源资产调查评估工作中,为林分收获预估和森林资产评估提供参考.
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