京郊风景游憩林侧柏-刺槐群落林下植被生态位研究  

Undergrowth vegetation niche in scenic-recreational forest communities of Platycladus orientalis and Robinia pseudoacacia in Beijing suburb.

作　　者：董建文[1] 翟明普[1] 徐程扬[1] 章志都[2] 王艳霞[2] 

机构地区：[1]省部共建北京林业大学森林培育与保护教育部重点实验室,北京100083 [2]福建农林大学,福州350002

出　　处：《中国生态农业学报》2007年第4期13-17,共5页Chinese Journal of Eco-Agriculture

基　　金：国家林业局重点项目(2003-018-L18);省部共建北京林业大学森林培育与保护教育部重点实验室项目(GJSYS100220402)资助

摘　　要：对北京市郊区风景游憩林侧柏-刺槐群落林下植被的主要植物种群的生态位宽度、生态位相似比例和生态位重叠分析表明,求米草、荆条、孩儿拳头和细叶苔草生态位宽度值较大,上层林分主要树种侧柏和刺槐的林下更新苗生态位宽度比其他植物种林下更新苗的生态位宽度低;林下植物种群的生态位相似性比例值和生态位重叠值相对较小,不同种群间对资源的竞争相对不剧烈,可采取人工措施改善树种的配置,促进生态位分化。Niche breadth, niche similarity proportion and niche overlap of 23 undergrowth populations of Platycladus orientalis and Robinia pseudoacacia community were analyzed. Results show that niche breadthes of Oplismenus undulatifolius, Vitex negundo, Grewia biloba and Carex duriuscula are relatively wider than those of the other species, while regenerated seedlings of Platycladus orientalis and Robinia pseudoacacia own narrower niche breadth. Niche similarity proportion and niche overlap of the 23 undergrowth populations are relatively smaller, indicating that competition for environmental resources is not fierce among the different populations. Thus niche differentiation can be enhanced by improving planting arrangement.

关 键 词：风景游憩林 侧柏-刺槐群落 生态位宽度 生态位相似比例 生态位重叠 

分 类 号：S791.27[农业科学—林木遗传育种]