檫木次生林空间结构的研究  

Study on spatial structure of Sassafras tsumu secondary forest

作　　者：曾思齐[1] 李东丽[1] 宋武刚 张敏[1] 黄炎俊[1] 

机构地区：[1]中南林业科技大学,湖南长沙410004 [2]崇阳县林业局,湖北崇阳437500

出　　处：《中南林业科技大学学报》2012年第3期1-6,205,共6页Journal of Central South University of Forestry & Technology

基　　金：林业公益性行业项目(201004032)

摘　　要：运用角尺度、大小比数和混交度等3个林分空间结构参数,对国有桂花林场的檫木与杉木、马尾松、南酸枣、鹅掌楸等不同树种形成的混交林进行了空间结构分析和比较。结果表明:檫木在檫杉混交林中混交度和空间隔离程度最大,而在与其它树种形成的混交林中混交度和空间隔离程度较小;檫木与杉木混交时在生长上处于优势,与马尾松混交时则稍微处于劣势;从林木分布格局上看,檫杉混交林为轻度团状分布,其余为随机分布。总而言之,此地檫木的最佳混交树种是杉木。Three indices（mingling intensity,neighborhood comparison and uniform angle index）were used to describe and compare the spatial structure of the mixed forest of Sassafras tsumu-Cunninghamia lanceolata,Sassafras tsumu-Choerospondias axillaris,Sassafras tsumu-Pinus massoniana,Sassafras tsumu-Liriodendron chinense.The results show that the mingling intensity of Sassafras tsumu in Sassafras tsumu-Cunninghamia lanceolata mixed forest was maximum,so the space isolation degree was the largest.When using neighborhood comparison method to characterize the size differentiation of trees,Sassafras tsumu had an advantage in Sassafras tsumu-Cunninghamia lanceolata mixed forest but had an disadvantage in Sassafras tsumu-Pinus massoniana mixed forest.Considering tree distribution pattern using uniform angle index,the stands in Sassafras tsumu-Cunninghamia lanceolata mixed forest was found to be a clumped distribution,but random distribution in other mixed forest.In conclusion,here the best mixed tree of Sassafras tsumu is Cunninghamia lanceolata.

关 键 词：檫木混交林 空间结构 混交度 大小比数 角尺度 

分 类 号：S718.541[农业科学—林学]