害鼠给人们带来很大的危害,人们可以利用杀鼠剂和不育剂对其进行控制.文中建立了分别在这两种控制下害鼠种群的动态模型,在模型中每隔固定时间施行某种控制,且害鼠的繁殖具有季节性.分析了模型的性态以及不育率、灭杀率、控制间隔等参数对种群发展的影响.最后得到了如下结论:如果只进行一种控制,不育控制的效果更好;在决定种群是灭绝还是持续存在方面,不育和灭杀的作用是相同的;两种控制具有各自的特点,联合施用,发挥各自的优势会达到较好的控制效果. Rodents have brought great harm to people, people can use rodenticides and inoculants to control them.In this paper, established a dynamic model of the rat population under the two control, in the model every fixed time Some kind of control was carried out and the seasonal reproduction of pest rats was made.It was analyzed that the performance of the model and the effects of infertility rate, killing rate and control interval on the population development.Finally, the conclusion was reached that if only one Control and infertility control are better; the roles of infertility and extermination are the same in deciding whether the population is extinct or extinct; the two controls have their own characteristics, and the combined application can exert better respective advantages The control effect.