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１９９１年６～９月在内蒙古大安岭吉文林区共设置２７块野外样地，对该地区的啮齿类区系进行了调查，１９９２年１０月到１９９３年５月选择野外样地４块对鼠类危害进行了调查，结果发现当地啮齿动物共有２目６科１２种，鼠类的密度与林龄有密切关系，林龄较长的林地鼠类密度较低。当地干旱阳坡樟子松１５ａ以下林木受害鼠危害最为严重，其被害率高达３０％，幼林地和新植林地受害鼠危害也较严重，被害率达２０％。
From June to September 1991, a total of 27 field plots were set up in Jiwen District, Daanling, Inner Mongolia. The rodent fauna in this area was investigated. From October 1992 to May 1993, 4 field plots The results showed that there are 12 species, 6 families, 2 orders and 6 rodents in the area. The density of rodents is closely related to the age of the woods. The density of the long-aged woodland rodents is relatively low. The harms of the rats damaged by the forest below 15a on sunny slopes of the local dry hills are the most serious, with the damage rate as high as 30%. The harms of rats in the young forest land and the newly planted forest land are also more serious and the damage rate is 20%.