黄土高原丘陵区人工刺槐林林分结构及林下植物多样性研究  

Structure of Robinia Pseudoacacia Plantation and Undergrowth Plant Diversity in the Hilly Area of the Loess Plateau

作　　者：刘建利[1] 李凯荣[1] 易亮[1] 冯朝红[1] 

机构地区：[1]西北农林科技大学资源环境学院,陕西杨凌712100

出　　处：《水土保持通报》2008年第3期49-52,70,共5页Bulletin of Soil and Water Conservation

基　　金：国家科技支撑计划课题(2006BAD03A02)

摘　　要：以黄土高原丘陵区刺槐林为研究对象，比较和分析了不同密度及立地条件的人工刺槐林径阶分布以及林分冠层和林下植物多样性的变化特征。结果表明，林分密度为2800株／hm2的幼龄林径阶为正态分布；密度为700~900株／hm2的中龄林径阶都接近正态分布。在相同林龄及立地条件下，随着林分密度的增大，叶面积指数增加，透光度降低，林下植物多样性指数和均匀度指数减少。The distribution of diameter class, stand canopy, and undergrowth plant diversity in Robinia pseudoaeacia plantation with different densities in the hilly area of the Loess Plateau were analyzed. Results show that the breast diameter class of stands presents a normal distribution when density of young-aged stands is 2 800 trees per hectare and a nearly normal distribution when density of young and middle-aged stands is 700-900 trees per hectare. Under the condition of the same stand age and site, leaf area index increases, while transparency and diversity and evenness index of plant species beyond forest canopy decrease with increased stand density.

关 键 词：刺槐 人工林 径阶分布 冠层特征 群落结构 

分 类 号：Q948[生物学—植物学]