以黄土丘陵区安塞县为研究对象,选择了3种不同干扰方式退耕弃荒地,研究了不同干扰样地植物群落组成、群落结构、物种多样性和地上生物量特征,分析了不同干扰方式对退耕弃荒地植被恢复的影响.结果表明,随干扰强度增大,一年生草本植物所占比例增加,草本和灌木种类均减少；封育措施增加了物种多样性,灌木层已经形成天然灌草地的雏形；3神干扰方式样地地上部分生物量表现为封育样地＞撂荒地＞放牧样地,封育样地具有向天然地带性群落演替的迹象.%Taking Ansai County in the gully area of hilly loess region for example, three different disturbances were selected to study the characteristics of plant community composition, community structure, species diversity and aboveground biomass, and then analyze the impacts of the three different disturbances on the vegetation restoration of abandonded farmland. The results showed that the annual herb species increased and plant species decreased with the increase of disturbances- Protective measure increased species diversity, and the shrubs became the rudiment of natural shrub-grassland. Aboveground biomass showed as PL(Protected land) > AL( Abandoned land) > GL( Grazing land), and ihe protected land had a sign of forming a natural grassland.
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