关键词: 群落, 演替, 灭鼠

Abstract: Rodent pests were controlled in the same experimental site in Xilinguole natural steppe using warfarin (0.05%) in April to May 1987-1988. The area controlled was 800 ha. each year.In contrast site, mean capture rate of total species in 1987 was 57.49±1.58%, and the numbers of Microtus brandti accounted for 95.59%. The rodent community was Microtus brandti+Phodopus sungorus+Citellus douricus+Allactaga sibirica+Cricetulus barabensis. The mean capture rate of total species in 1988 was 21.31±1.09% and the numbers of M. brandti accounted for 94.87%. The rodent community was the same as in 1987. The mean capture rate of total species in 1989 decreased and it was 14.56±0.78%. The community became P. sungorus+C. barabensis+A. sibirica+Meriones unguiculatus+M. brandti.In contraolledt site, the dominant species was M. brandti and it accounted for 92.00% before controlling in 1987. The community composition was the same as in contrast site at this time. After controlled by chemical rodenticide in May the total capture rate was 0.76%. The numbers of M. brandti decreased, while the numbers of P. sungorus increased and it accounted for 50.00%. The Community became P. sungorus+M. brandti+A.sibirica+Ochotona daurica.As a result, we conclude that control using chemical rodentieide can cause stteeession of rodent community and the process is the same as natural succession.