由于玉米雌蕊吐丝晚于抽雄散粉,所以,即使父母本生育期相同也应当将父本迟播3～5天,或将母本催芽后同期播种。如两亲本花期相差5天以上,为使花期相遇就需要调节播种期。调节播种期应注意两点:一是母本吐丝期与父本花期相差的天数不等于两个亲本播种期相差的天数。二是玉米花丝 Because pistils of corn are later tasted loose powder, so even if the parents of the same growth period should also be the father sowing 3 to 5 days later, or the mother germination after sowing at the same period. If the difference between the two parents of the flowering more than 5 days, in order to meet the flowering on the need to adjust the sowing period. Adjusting the sowing period should pay attention to two points: First, the female parent silking period and the father of the difference between the number of days does not mean that the two parents of the difference between the number of days of planting. Second, corn silk