作　　者： ; ; ; ; ; ;

机构地区： 北京林业大学林学院森林培育与保护教育部重点实验室

出　　处： 《江西农业大学学报》 2007年第1期66-71,共6页

摘　　要： 对北京市郊区风景游憩林侧柏-刺槐群落林下23种主要植物种进行种间联结性的测定与分析。运用方差比率法(VR)分析表明,种群间的整体联结性为不显著的负联结,不同种群趋向于独立,所调查侧柏-刺槐群落林下植被处于不稳定阶段;综合利用2χ统计量、成对物种联结系数AC和Jaccard指数对成对物种的种间联结性进行分析,结果表明,多数种对间的联结性不显著,种间资源竞争不明显。该群落应在风景游憩林经营的基本原理指导下,进行适当的修枝、间伐,调整林分密度,以促进林下植被的生长,提高森林景观的美景度。 A series of parameters for the interspecific association of dominant undergrowth in Platycladus orientalis -Robinia pseudoacacia community, including the importance value, collectivity variance ratio （VR-） ,χ^2 - test, AC and Jaccard index based on a 2 × 2 contingency table, were analyzed. The negative association of collectivity variance ratio among 23 dominant undergrowth species in community is not significant. This indicates that the community is not mature and in the phase of succession. According to χ^2 - test, AC and Jaccard index, the interspecific associations of most speciespairs are unremarkable, and few very remarkable, which indicate that the competition is not intense in the Platycladus orientalis -Robinia pseudoacacia community, and the kinds of shrub are relatively small. So it is necessary to change stand structure and species composition of Platycladus orientalis - Robinia pseudoacacia community in order to increase its species diversity and beauty value.

关 键 词： 风景游憩林 侧柏 刺槐林 种间联结 美景度

领　　域： [农业科学]