检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
作 者:Li RuxiuNortheast Forestry University
出 处:《Journal of Northeast Forestry University》1993年第2期51-56,共6页
摘 要:The paper studies ten major tree species occupying the space in naturalsecondary forests in Mao Er mountain area.The space is divided into horizon,elevation,slope,aspect and topographic position layer.The features of the species of trees areexamined using the concept of distribution width and the method of space statistics.Theconclusions of analysis indicate that Aspen and Asian White Birch community of forests inthe area would become failing,and the distribution of Mongolian Oak and Mongolian Lidenand Manchurian Walnut are Limited by the slope and aspect and topographic position.Elm,Maple,Manchurian Ash would become the major species constituting naturalsecondary forests in future in this area.The paper studies ten major tree species occupying the space in natural secondary forests in Mao Er mountain area. The space is divided into horizon, elevation, slope, aspect and topographic position layer. The features of the species of trees are examined using the concept of distribution width and the method of space statistics. The conclusions of analysis indicate that Aspen and Asian White Birch community of forests in the area would become failing, and the distribution of Mongolian Oak and Mongolian Liden and Manchurian Walnut are Limited by the slope and aspect and topographic position. Elm, Maple, Manchurian Ash would become the major species constituting natural secondary forests in future in this area.
关 键 词:Species of TREE GEOGRAPHIC SPACE Distribution SPACE analysis
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.15