中文摘要：

通过实地调查，对临江市八里沟老秃岭长期放牧草地和林下草地植物种类动态及其多样性进行了比较分析。结果表明：在长期放牧草地和林下草地中，共出现111种植物，隶属于43科，93属，其中，长期放牧草地（1区）共有植物63种，林下草地中（2区）109种。林下草地植被区以菊科、百合科、毛茛科、禾本科、豆科、蔷薇科、石竹科、堇菜科、伞形科、松科、虎耳草科、蓼科、唇形科植物占优势，占68％以上；长期放牧草地植被区以菊科、百合科、毛茛科、禾本科、蔷薇科、堇莱科、蓼科、十字花科植物占优势，占63％以上。2个植被区的镶嵌群落均以分枝植物和直立植物为主，其次为莲座植物。在Raunkiaer生活型谱中，2个植被区均以地面芽植物和地下芽植物的比例最大。长期放牧草地植被区高位芽植物比例很小，仅占3．2％。

英文摘要：

A field survey was conducted on plant species and diversity in grassland in Baligou of Linjiang City, Jilin Province. The differences in plant species and diversity were studied between a long-term grazing grassland and an understory grassland. Results showed that a total of 111 species of plants wererecorded in the long-term grazing grassland and the understory grassland, belonging to 43 families and 93 genera. Among them, 63 species of plants were found in the long-term grazing, and 109 species were observed in the understoty grassland. Plants of Asteraceae, Liliaceae, Ranunculaeeae, Poaceae, Leguminosae, Rosaceae, Caryophyllaceae, Violaceae, Umbelliferae, Pinaeeae, Saxifragaceae, Polygonaceae, and Lamiaceae hold dominant positions in the understory grassland, accounting for more than 68% of the total number of plant species. Plants of Asteraceae, Liliaceae, Ranuneulaeeae, Poaceae, Rosaceae, Violaceae, Polygonaceae, and Cruciferae are dominant in the long-term grazing grassland, occupying over 63 % of the total. The mosaic of vegetation commu- nities is mainly composed of branching plants and standing vegetation in the two types of grassland, followed by the rosette plant. In Raunkiaer life form spectrum, hemicryptophyte and geophyte make up the largest proportion of plant shoots in the two grasslands. Phanerophytes account for a small proportion （3.2%） in the long-term grazing grassland.