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根据山东费县１９９５年５月～１９９６年４月对黑线姬鼠季节消长观察数据和当地气象站７项气象因子资料，给出了气象因子与鼠密度的最优回归子集模型和逐步回归模型。结果显示，月平均相对湿度是影响鼠密度变动的最重要的气象因子
According to the data of seasonal fluctuation of Apodemus agrarius from May 1995 to April 1996 in Shandong province and the seven meteorological factors data of local weather station, the optimal regression sub-model of meteorological factor and rat density and stepwise regression model. The results showed that the monthly average relative humidity was the most important meteorological factor that affected the variation of rat density