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山杨天然林林分结构的研究

标题: 山杨天然林林分结构的研究
英文标题: A STUDY ON STRUCTURES OF NATURAL POPULUS STANDS
作者: 陈东来,秦淑英
英文作者: CHEN DONGLAI,QIN SHUYING
出版时间: 1994-01-01
机构: 河北农业大学
关键词: 山杨天然林,林分结构,直径分布,WEIBULL分布函数
英文关键词: NATURAL POPULUS STAND,STRUCTURE OF STAND,DIAMETER DISTRIBUTION,WEIBULL DISTRIBUTION FUNCTION
刊名: 河北农业大学学报
英文刊名: JOURNAL OF AGRICULTURAL UNIVERSITY OF HEBEI
ISSN: 1000-1573
卷号: 001
页码: 36-43
分类号: S758.5
摘要: 该文利用73块山杨标准地资料,研究分析了山杨天然林的林分结构,验证了F(D)=ADB十K关系成立,林分直径分布遵从WEIBULL分布时,其林分树高分布、年龄分布也遵从WEIBULL分布的理论.结果表明,山杨天然林多属单层同龄纯林,且直径结构表现出了很强的规律性;在直径较小的山杨林分中,其直径分布为正偏,峰度较显著.当林分平均直径大于8CM,其分布为负偏,用WEIBULL分布函数拟合时,在年龄较小,林分平均直径小于6CM时,其形状参数1.5<C2;当林分平均直径大于7CM时,形状参数2<C3.
英文摘要: Using seventy.seven plots natural poplar stands,structure of stands are studied and analysed in this paper. The function f(D)=k+αDβ has been tested, the diameter distribution follows weibull distribution, the height distribution and the age distribution follow too. The results have showed single layer and even-age stands in natural poplar stands. The diameter distribution shows evident rules. the mean diameter is smaller in poplar stands,the bia degree of diameter distribution is left, and lepto kurtosis i...