择伐强度对天然云冷杉林空间分布格局的影响  

Effects of selective cutting intensity on spatial distribution pattern of natural spruce-fir forests

作　　者：沈林[1] 杨华[1] 亢新刚[1] 岳刚[1] 

机构地区：[1]北京林业大学省部共建森林培育与保护教育部重点实验室,北京100083

出　　处：《中南林业科技大学学报》2013年第1期68-74,共7页Journal of Central South University of Forestry & Technology

基　　金：林业公益性行业科研项目(200804027)

摘　　要：探讨不同强度的择伐对天然云冷杉林空间分布格局的影响,为合理经营森林提供依据。采用点格局分析法的O-ring统计,对天然云冷杉林在3种不同强度(弱度20%、中度30%、强度40%)择伐22年后主要树种的空间分布格局及树种间空间关联性进行了分析。结果表明:4块样地林分整体和主要树种均表现为随机分布,强度择伐林木多呈聚集分布,而弱度、中度择伐树种大多处于随机和均匀分布;主要树种间的空间关联性表现为弱度择伐的负相关现象多于其它择伐类型。弱度择伐更加有利于天然云冷杉林林分空间结构的优化。The research was done in order to explore the effects of different selective cutting disturbance of different intensities on the spatial patterns of natural spruce-fir stands and provide evidences for reasonable management forest. The spatial patterns of dominant species and the spatial correlations among different species were analyzed by using one point pattern analysis method, which is O-ring statistics. The experimental stands were harvested by selective cutting of different intensities （low intensity of 20%, medium intensity of 30%, high intensity of 40%） and a un-cutting plots. The results show that the spatial pattern of either the forest as a whole or the dominant species took on a random distribution, that of the forest with strength selection cutting showed a aggregated distribution, while in random and uniform distribution with low and medium selective cutting. There existed a phenomenon that the negative correlations of dominant species with low intensity elective cutting were more than other cutting type＇s. The low intensity selective cutting may effectively enhance the stability of forest community spatial structure and make the communities spatial structure more superior.

关 键 词：天然云冷杉林 择伐强度 空间分布格局 O-ring统计 

分 类 号：S752.2[农业科学—森林经理学]