辉南林区森林鼠害的调查结果表明：害鼠种类主要是棕背鼠平，约占全部森林害鼠种类的72％，其余为红背鼠平、大林姬鼠等。害鼠密度与林木被害程度显著相关，当铗日捕获率在1％～5％时，林木被害率在3％～10％之间；当铗日捕获率在6％～15％时，林木被害率在11％～30％之间；当铗日捕获率在16％以上时，林木被害率超过30％。森林害鼠的种群数量具有明显的季节与年度变化规律，且与气候条件、地形和土壤、植物、天敌、人类经济活动等密切相关。%Survey result of forest pest rat in Huinan forest region indicated that major species was Clethrionomys rufocanus, accounting for about 72%of the total forest pest rodent species; others were C.rutilus and A.podemus peninsulae ,etc. There was a significant correlation between pest rat density and forest impaired degree .On trap days, when capture rate was 1%~5%, forest impaired rate was between 3%~10%;when capture rate was 6%~15%, forest impaired rate was be-tween 11%~30%;when capture rate was more than 16%, forest impaired rate was over 30%.Population quantity of for-est pest rat had obvious seasonal and annual variation , and was closely related to climate , topography and soil , plants, nat-ural enemy and human economic activities ,etc.
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