【摘要】 本文自1988～1993年历时5年的时间在内蒙古半荒漠区约11万km2（涉及行政上12个旗、县、郊区）的调查区域内共设量259个样方，以夹日法调查为主，并辅以线路调查法、地箭法、踪迹法等方法，共布放有效夹日131109个，捕获啮齿动物36种，加之80年代以来作者在该地区的工作，共采集啮齿动物标本5000余号，基本查清了该地区啮齿射物的种类，分布、密度及其危害情况，根据调查结果对该地区害鼠对农业、牧业、林业危害的特点及其成因迸行了分析，结果发现当地阴山北麓的旱作农田是受害鼠危害较重的地区；而半荒漠草原中严重退化的荒漠草原鼠害极为严重；林地则为人工林地及育苗圃内遭受鼠害较重。根据其危害特点将该地区害鼠区划为6十大的危害区的11个害鼠害区类型。更多还原

【Abstract】 An investigation of kinds,distribution,density of rodent species in the semiarid region of Inner Mongolia was conducted from 1988 to 1993 using trap night method. 131109 trap nights on 259 sites were carried out and 5000 indivaduals of 36 specieses of rodents were caught. According to the results of the investigation, the characteristics and cause of rodent damage on cropp,stock raising,forest were assessed.The results showed that dry farmland Suffered seriously from the damage, severe deteiorated desert steppe was most critically harmed and free nursery was also harmed seriously by the rodert pests. In accordance with the charateristics of rodent damage,the semi—arid region was divided into 11 rodent harmful types of 6 large harmful areas.更多还原