中文摘要：

对不同干扰梯度下的植被特征、土壤含水量、重要值和多样性等指标进行比较分析。结果表明：随着干扰程度的加大,多年生植物的种类不断减少,植物适口性以中度干扰为最高;植被的盖度、高度及密度均是中度干扰〉重度干扰〉轻度干扰,生物量调查结果是重度干扰〉中度干扰〉轻度干扰;中度干扰和重度干扰的主要优势种重要值分布相对均匀,而轻度干扰下只是极少数几个物种有较高的重要值;多样性结果显示：中度干扰〉轻度干扰〉重度干扰,表明进行围封的同时进行适当的放牧干扰,才更有利于研究区植被朝多样化方向发展。综合以上分析,中度干扰（半封育措施）显然是农牧交错区植被恢复的最好方式。

英文摘要：

This article compares and analyzes vegetation features,soil moisture content,importance value and diversity index under different disturbance ways.The result shows that,with the increase of disturbance,perennial plant species are on the decrease,the plant palatability under moderate disturbance is the highest.And it is also revealed that the vegetation coverage,height and density under moderate disturbance are the largest,those under severe disturbance are the second largest,those under mild disturbance are the lowest.The survey result for biomass is： severe disturbance the largest,moderate disturbance the second,mild disturbance the lowest.The importance value of dominant species under moderate disturbance and severe disturbance is evenly distributed,while that under mild disturbance is relatively concentrated only in a few species.The result of diversity is： moderate disturbance the largest,mild disturbance the second,severe disturbance the lowest,which indicates that making appropriate frequent disturbance under enclosure makes the vegetation of the study area develop towards the diversification direction.Synthesising the above analysis,moderate disturbance（half-enclosure） is obviously the best way to vegetation restoration for farming-pastoral ecotone.