摘要
用混交度、大小比数、角尺度3个参数研究山杨次生林的空间结构,得出山杨次生林树种间隔离程度较大,林分稳定性较高;山杨处于明显的优势地位,枫桦、椴树、云杉的优势和被压的林木在数量上基本相同,而杂木、水曲柳和榆树处于劣势;林地的平均角尺度为0.515,林木个体的水平空间格局为随机分布。
The study on the spatial structure of secondary forest of Populus tremuloides in Jingouling have been done by using three parameters like mingling, size ratio and degree of angle square. The results show greater isolated distance is, the more stable stand is. And Populus tremuloides is remarkably pre-dominant in the sample, the advantages of spruce, Liquidambar spp. , Betula spp. and Tilia spp. have almost same number as those of suppressed trees. While Manchurain dwarf and Misscellaneous spp. are in inferior position. The average degree of angle square is 0.515, and spatial distribution of individual tree is random.
出处
《林业调查规划》
2007年第4期3-7,共5页
Forest Inventory and Planning
基金
国家自然科学基金项目(30371158)
"十五国家攻关"子课题(2001BA510B0703)
林业科技支撑计划(2006BAD03A08-04)共同资助
关键词
空间结构
分布格局
混交度
角尺度
林分大小比数
山杨次生林
金沟岭
spatial structure
distribution layout
extent of mingling
degree of angle square
ratio ofstand
Populus tremuloides
Jingouling
