关键词: 生态过程, 鼠害治理, 鼠类群落

Abstract: 　Rodent pest management is one of the important methods to prevent the grasslandfrom degenerating. we aims to analyse and discuss the changing process of rodent communities after rodent pest managements in this paper. The results of five years'study in alpine meadow are shown as follows.
Using the poison baits to kill plateau pika and plateau zokor, sowing seed and controlling the grazing cattle in secondary vegetation, the population densities of plateau zokor and plateau pika decreased rapidly and have been kept their lower from increasing for f ive years. The densities of root vole and Gan su Pika which usually are lower in
meadow fluctuated stongerly during those years. The diversity and evenness indices of rodent community have changed irregularly form any years. However, there are not sign ificant difference among the diversity and evenness indices of community which used the poison baits to kill the two rodents in secondary vegetation after the second year.Killing plateau pika only with poison baits in primary vegetation, the population density of plateau zokor increased gradually. The density of the third year after killing is significantly higher than the first year's. The treatment of fence and controlling the grazing cattle can keep the population density of plateau pika from increasing effectively. But it is not usefu to plateau zokor. killing pika only with the baits can not prevent pika population from recovering in a few years. Further more, the killing cause zokor population to increase because the balance of rodent community has been broken.
　The treatment of capturing and killing plateau zokor cause the rodent indices of diversity and evenness to decrease in primary vegetation. Whereas, it can cause the indices to increase in artificial or semi-artificial grassland.

Key words: Ecological process, Rodent pest management, Community