【摘要】 放牧是草原植被利用的主要形式，牲畜的牧食极易改变蝗虫生存的栖境结构。本研究表明：在重牧区蝗虫发生的密度最高，而轻牧区蝗虫发生的密度最低。这说明，不同的牧压强度所形成的栖境对蝗虫栖境选择的适合度不一致。重牧后的栖境有利于蝗虫的发生，特别是有利于地栖型蝗虫的发生，而在不受放牧干扰、植物能自由生存下的栖境则有利于植栖型蝗虫的发生。合理放牧后的栖境则不利蝗虫发生。更多还原

【Abstract】 The influence of livestock grazing on grasshopper were compared in the three different grazing intensities in Leymus chinensis prairie in Inner Mongolia,China.Results indicate that the plant biomass was the lowest and the grasshopper density was the highest in the heavily grazed area.In this area,the habitat structure was benifit for the terricole grasshopper to select.In no grazed area,however,the plant biomass was the hightest and the habitat structure was benefit for the planticole grasshopper to seclect.In the lightly grazed area,density of grasshopper was the lowest.更多还原