东南沿海湿地松防护林胸径树高关系研究

为了给沿海防护林的保护和建设提供理论依据，采用样地调查的方法对东南沿海湿地松防护林进行调查，应用概率密度函数中运用最广的Logistics方程、Gompertz方程、Weibull方程、S曲线、二次曲线、Richards方程6种理论生长方程，拟合湿地松胸径与树高的关系。结果表明：Logistics方程的拟合效果最好，相关系数最大（0.9618），剩余平方和最小（96.599），更能准确描述湿地松的胸径树高生长特性，更适合于建立湿地松的胸径树高生长模型。Welbull模型拟合效果稍逊Logistics模型。本研究是东南沿海湿地松胸径树高模型，该模型也可尝试应用到其他防护林类型森林。

The Study of the Relationship Between DBH and Height of the Coastal Protection Forest of Pinus elliotii E. in Southeast of China

In order to provide guidance and basis for protecting coastal forests, sampling survey was conducted to study and analyze the coastal forests of Pinus elliotii E. in southeast of China. And 6 widely used theoretical growth equations, which were Logistics, Gompertz, Weibull, S curve, Second curve and Richards, were used to establish the correlation between breast and height in DPS. The results indicated that compared with other equations, the relation value R of Logistics equation was maximum (0.9618) and surplus square sum was minimum (96.599). Therefore, Logistics equation fits the correlation of Pinus elliotii E. between breast and height better than others, which was more fitted to establish tree breast-height diameter growth model of Pinus elliotii E.. And Weibull equation was little less than Logistics one. The Logistics model was suitable for the forest of Pinus elliotii E. in southeast of China, and might be applied to other protection forests.