南京郊区典型人工林分空间结构及间伐响应  

Spatial structure and response after thinning of different plantation in Nanjing suburb

作　　者：黄利斌[1] 蒋春[1] 王磊[1] 

机构地区：[1]江苏省林业科学研究院,江苏南京211153

出　　处：《江苏林业科技》2010年第2期1-6,共6页Journal of Jiangsu Forestry Science & Technology

基　　金：国家"十一五"林业科技支撑计划专题"长三角城市森林建设技术试验示范"(2006BAD03A1702);江苏省国际科技合作计划项目"健康森林经营技术研究"(BZ2006060);江苏省林业三项工程项目"丘陵山区林地立体经营模式及林相改造示范"(LYSX[2009]35);"健康森林模式与现代林业发展关键技术示范"(LYSX[2009]54)研究内容之一

摘　　要：采用混交度、大小比数、角尺度等林分空间分布格局参数分析了南京市郊区3种不同人工林的空间结构特征。结果表明,马尾松与杉木的混交林分平均混交度达0.61,接近较强度混交,群落的组成较复杂。而间伐前杉木林和麻栎林的混交度较小,分别为混交度为0.25和0.15,处于较弱度混交以下,群落组成较简单。马尾松与杉木混交林和麻栎林混交的平均角尺度分别为0.50和0.49,处于随机分布状态,而间伐前杉木林的林分平均角尺度为0.55,林内所有树种均属于聚集分布状态。马尾松与杉木混交林、麻栎林和间伐前杉木林的平均大小比数分别为0.61,0.5和0.54。在麻栎林中,麻栎的生长占较优势状态;在间伐前杉木林和马尾松与杉木混交林中,马尾松生长占绝对优势。杉木林间伐2 a后,林分的平均混交度由0.25上升到0.38,达到了较弱度混交以上,而林分的平均角尺度和平均大小比数变化不明显。Three parameters i.e.mingling index,uniform angle index and neighborhood comparison were used to describe the stands spatial structure of three kinds of plantations in a suburb area in Nanjing.The results showed that the average mingling index of mixed Pinus massoniana and Cunninghamia lanceolata stand was 0.61,which was closer to a strong of mixed degree and a complex composition community.Before manually thinning stands,the average mingling indices of Quercus acutissima and Cunninghamia lanceolata were 0.15 and 0.25 respectively,and the community composition was simpler for its being a weak mixed degree.The average uniform angle indices of Q.acutissima and mixed P.massoniana-C.lanceolata stands were 0.50 and 0.49 respectively,and the trees were distributed in a random way.Average uniform angle index of C.lanceolata before manually thinning stands was 0.55,and its distribution was clustered.The average neighborhood comparison of Q.acutissima,mixed P.massoniana-C.lanceolata and C.lanceolata before manually thinning stands were 0.61,0.5 and 0.54 respectively.After two-year thinning,the average mingling index of C.lanceolata stands increased from 0.25 to 0.38,reaching a weaker mixed degree,but the average uniform angle index and neighborhood comparison did not change significantly.

关 键 词：人工林 空间结构 角尺度 混交度 大小比数 疏伐 

分 类 号：S758.3[农业科学—森林经理学]