中文摘要：

预测林分径阶结构能为人工林的定向培育提供科学可靠的理论依据。文中调查并分析了科尔沁沙地南缘4种不同行带式配置下赤峰杨固沙林径阶结构特征,分别利用Normal、Weibull以及Logistic分布函数对林分的径阶分布进行了模拟,并得到各模型预测参数,然后用卡方统计量对3种分布模型进行了检验。结果表明Logistic分布函数模拟低覆盖度行带式固沙林径阶分布效果最好。

英文摘要：

Diameter distribution forecasting could provided dependable theory foundation for the oriented-cultivating of artificial forests.In this paper we analyzed the characteristics and regulations of 4 sand-fixation forests planting in different belt-scheme of P.＊ Xiao zhuanica W.Y Hsu et Liangcv.‘Chifengensis＇ in southern margin of Horqin sandy land.Normal,Weibull and Logistic diameter models were used to fit the diameter distribution respectively,obtained all model prediction parameters,and then calculated chi-squared statistic to check the three diameter distribution models.The results showed that Logistic model was the most appropriate model fit for the sand-fixation forests planting in belt-scheme in study area.