摘要： 选用6个玉米自交系，1998年先进行模拟盖膜试验，得出其回归关系=8-0.8x。1999年根据模拟试验结果再进行制种田盖膜试验，结果表明，父母本抽雄抽丝期相差在10d之内，可将父母本同期播种，选择正确的时间地膜覆盖晚熟亲本，可以起到调节花期的作用，从而保证制种产量的稳产高产，减弱外界环境的干扰。

关键词: 玉米, 地膜覆盖, 制种田花期调节

Abstract: The experiments were conducted from 1998 to 1999 to study silking date regulation for corn seed production w ith plastic film mulching.Six selftines were selected to obtain the regression equation ; y =8-0.8x.The reg ression coef ficient showed that the mulching date for selflines was one day ahead of time the silking date 0.8 days earlier in 10 days after planting in 1998.The results of experiment in 1999 , showed that if the silking dates betw een the female and male parent has 10 days difference as planting of the sameday their silking date may be met by optimum mulching for late mature parent.Therefore, the film mulching may regulate silking to ensure corn seed production for stable and high yield.

Key words: Corn, Plastic film mulch, Silk date regulation, Seed production

中图分类号: 

• S51.048