20 0 0年 10月～ 2 0 0 1年 10月对下辽河平原地区撂荒、林地、旱田、水田 4种不同土地利用方式的土壤微节肢动物进行了调查 .应用个体数密度、类群丰富度、多样性指数和均匀度 4个群落参数 ,研究了土壤微节肢动物的群落结构和季节变化 .结果表明 ,撂荒中土壤微节肢动物的 4个群落参数均为最高 ,旱田均为最低 ,季节变化影响土壤微节肢动物的群落结构 ,但土地利用方式不影响群落结构的季节变化型 .下辽河平原地区不同土地利用方式共鉴定出土壤微节肢动物 12个类群 ,撂荒、林地、旱田中弹尾目 (Collem bola)和蜱螨目 (Acarina)为优势类群 ,双翅目 (Diptera)、鞘翅目 (Coleoptera)和膜翅目 (Hymenoptera)为常见类群 ,水田中弹尾目、蜱螨目和双翅目为优势类群 ,鞘翅目为常见类群 .各土地利用方式、各季节均在表层土壤出现的类群最多、密度最高 ,中层次之 ,底层最少 From October 2004 to October 2001, soil micro-arthropods of four different land use types of abandoned land, woodland, dry land and paddy field in the lower Liaohe Plain were investigated. The population density, abundance, Diversity index and evenness were used to study the community structure and seasonal variation of soil micro-arthropod.The results showed that the four community parameters of soil micro-arthropod were all the highest in the abandoned land, the lowest in the dry land, and the seasonal variation Soil micro-arthropod community structure, but the land use pattern does not affect the seasonal variation of community structure.The 12 different groups of soil micro-arthropods were identified under different land use patterns in the Lower Liaohe Plain, such as abandoned land, woodland and dry land, bola and Acarina were the dominant groups. Diptera, Coleoptera and Hymenoptera were the common groups. The dominant species in the paddy field were Tettigoniidae, Acarina and Diptera Coleoptera and Coleoptera were the most common taxa, with most of the topsoil groups occurring in all seasons, with the highest density, the lowest level and the lowest level