摘要
利用十几年的数据 ,通过差异分析 ,研究了羊草草原退化群落及其围封 ( 1 983年 )恢复群落在年度内和年度之间的群落性状差异性变化规律 ,结果表明 ,长期放牧的冷蒿退化群落其内部差异性很小 ,已经形成比较稳定的群落 ;对其进行围封禁牧后 ,在最初的 8～ 9年时间内 ,恢复进程中的群落与退化群落的差异不大 ,而在 1 991年以后 ,群落性状发生了极为明显的变化 ,已经恢复成以羊草和大针茅为主要优势种的群落 .此外 ,本项研究表明 ,群落性状的差异性分析可以作为一种群落演替规律的实验研究方法 .
Using the data obtained by more than ten years ,with the method of difference comparing ,we study the changing laws of community nature difference inside one year and between years of degraded community and enclosed recovering community of Leymus chinensis steppe. The result shows that the long overgrazing community of Artemisia Frigida has formed a steady community and appeared a little difference inside the community; After enclosed, there is a little change between the recovering community and degraded community during first 8～9 years. But after 1991, the community nature changed markedly. It has formed the community dominant by Leymus chinensis and Stipa Grandis. Moreover, the research shows the difference comparing of community nature can be used as a research method for community succession laws.
出处
《内蒙古大学学报（自然科学版）》
CAS
CSCD
2000年第3期314-318,共5页
Journal of Inner Mongolia University：Natural Science Edition
基金
国家自然科学基金资助项目
关键词
羊草草原
放牧退化
围封恢复
群落性状差异
Leymus chinensis steppe
grazing degradation
enclosing recovery
difference of community nature
