关键词: 鼠类群落, 模糊聚类分析, 斑块生境, 农作区, 黄土高原

Abstract: Studies on the rodent community of agricultural area of loess plateau was made in near 6 km² site in Chengcun, Lingbao County from July to October, 1992 and from April to November．1993, Primary results are summarized as follows：
1.The rodent community was composed of 12 species，i.e., cricetulustriton，C. longicaudatus，Microtus mandarinus，Apodemusagrius,A.·peninsulae，MusMusculus,Rallus norvegicus，R.niviventer,Eu,tamia sibiricus ,Sermophilus auricu Sciarotams dianu8，Meriones meridian, M.mand arinus is burrowing, but the rest are not．
2.Based on comparison among 3 kinds of species similary measurement includingindex of proportion similarity (PS), correlation coefficient (r),and cosine of angle (Cos) ，the results of fuzzy clustering analyses with were significantly explained by rodent distribution in patchy habitats using satistical test < 0.025). The rodent community was divided into 2 sub-communities as follows：I. Microtus mandrinus Griceluhustriton：Ⅱ.C.triton+ M.mandarinus.
3．The sub-community I ranged from farm land，orchard to abandoned field，with 10 species of which abundance of M.manda rinus was the highest，71.1% . The sub-community Ⅱmainly were living in more than 3 year old abandoned field in which C.triton was the dominant one among 11 species．The species dversity index of the sub-community Ⅱ was higher than that of the sub-community I.

Key words: Rodent community, Fuzzy clustering analyses, Patchy habitats, Agricultural area, Loess plateau