在玉米制种时因父母本生育期不同需要错期播种 ,但往往使一些亲本不能选择最佳时期和墒情下种 ,造成缺苗断垄和发育不良等现象。利用地膜覆盖可以调节温湿度这一有利条件 ,分年度采用自交系模拟盖膜和制种田盖膜两种试验方案 ,从而提出利用地膜覆盖可以使父母本抽雄 (丝 )期相差在 10天内的亲本同期播种 ,但需按理论公式来确定晚熟材料盖膜时间 ,从而达到花期良好相遇之目的。 When maize seeds are planted due to different parents and different growing periods, some parents often can not choose the best period and soil moisture for planting, resulting in the phenomenon of missing seedlings breaking ridge and poor growth. The favorable conditions of temperature and humidity can be adjusted by using plastic film mulching. Two kinds of experimental schemes of simulated mulching film and field mulching film were introduced in different annuals. The results showed that the use of mulching can make the difference between male and female parents in ten days Parents planted the same period, but according to the theoretical formula to determine the late maturing material cover time, so as to achieve a good flowering period purposes.