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桉树是我国南方种植面积最大的人工林树种,研究其直径分布有助于实现可持续经营。采用Normal分布函数、Logistic分布函数、Weibull分布函数和Γ分布函数拟合和检验了海南省文昌、琼中、昌江以及乐东桉树人工林直径分布。结果表明:4个模型中,Normal分布函数和Weibull分布函数对文昌桉树人工林直径分布拟合效果较好,Weibull分布函数对琼中、昌江和乐东桉树人工林的模拟结果较可靠。
Eucalyptus is the largest planted tree species in southern China, studying its diameter distribution helps to achieve sustainable management. The normal distribution function, Logistic distribution function, Weibull distribution function and Γ distribution function were used to fit and test the diameter distribution of plantations in Wenchang, Qiongzhong, Changjiang and Ledong of Hainan Province. The results showed that the Normal distribution function and Weibull distribution function fitted well to the diameter distribution of plantation of Eucalyptus plantation in four models, and the Weibull distribution function was more reliable for simulating plantation of Eucalyptus plantation in Qiongzhong, Changjiang and Ledong.