祁连山东段天然草地植物群落稳定性分析  

AN ANALYZING ON STABILITY OF NATURAL PASTURE VEGETATION COMMUNITY IN THE EAST QILIAN MOUNTAIN

作　　者：杜铁瑛[1] 张怀宁[1] 马久[1] 

机构地区：[1]青海省草原总站,青海西宁810008

出　　处：《青海草业》2002年第2期21-24,共4页Qinghai Prataculture

摘　　要：利用法国生态学专家M .Godron提出的方法 ,对祁连山东段天然草地植物群落做了稳定性测定 ,其结果表明 :在测定的 5个草地型中 ,种的百分数与累积相对频度两线相交点分别为 41 5 9、39 61、44 5 6、43 5 7和 43 5 7,与稳定点 2 0 80均不趋于接近。证明祁连山东段天然草地由于放牧过重而导致放牧演替 ,造成植物群落极不稳定。今后应加强保护措施 。The stability of natural pasture vegetation community in the east Qilian mountain was studied by the French ecologist, M. Godron reported methods and got result as followed. In pasture of five different types there, the cross points between the species proposition lines(x) and accumulation relative frequency lines(y) were 41/59,39/61,44/56,43/57and 43/53, and all of them were not located close to the stabiliting point (20/80). That means the grassing evolution dominented by heave stocking has led serious unstability of vegetation community in that pasture area. Protection measures should be taken to orient the evolution towards progress direction.

关 键 词：祁连山东段 植物群落 稳定性 

分 类 号：S812.3[农业科学—草业科学]