戴云山红楠种群直径分布规律

Study on diameter distribution of Machilus thunbergii population in Daiyunshan Mountain

应用5种概率分布律对戴云山国家级自然保护区红楠种群的直径结构进行拟合,比较不同类型的拟合效果。结果表明,β分布函数能较好地表达红楠种群的直径分布结构,拟合效果最好,正态分布函数次之;不同群落类型的红楠种群直径分布均符合β分布,偏度大部分呈正偏,峰度值均为负,表明红楠种群直径分布范围较大。其研究结果对红楠林的合理经营具有重要意义。

Five probability models are applied to analyze the structure features on diameter distribution of Machilus thunbergii population in Daiyunshan Mountain National Nature Reserve. The results show that Beta distribution model is the best fitness to express the structure of diameter distribution of M.thunbergii population, followed by the Normal distribution. Diameter distributions of M.thunbergii population in different communities are all according to Beta distribution model, most of skews are positive and crests are all negative, which suggest that the range of diameter distribution are wider. The resulting principle will provide an important guide for natural forest management.