在玉米杂交制种生产过程中,父、母本花期是否相遇,首先取决于父、母本的播期,但由于诸多因素影响,即便是播种错期正确,也可能会出现较短时期的花期不调,影响制种产量,这就需要在生长过程中进行花期预测,以便及时采取调整措施。1990、1991两年我们对掖单12、掖单13、新黄单85—1、新黄单904等四个玉米杂交组合的亲本自交系进行观察研究,得出的规律是:母本雌穗花丝4～5天吐完,花丝生命力7～8天,吐丝后3～6天受粉能力最强,结实率 In the process of maize hybrid seed production, whether parental flowering or female flowering first depends on the sowing time of the parent and the female, but due to many factors, even if the wrong planting is correct, there may be a relatively short period of flowering Not adjusted, affecting seed production, which requires flowering in the growth process to predict, in order to take timely adjustment measures. In 1990 and 1991, we observed and studied the inbred lines of four maize hybrids including Yedan 12, Yedan 13, Xinhuangdan 85-1 and Xinhuangdan 904. The results showed that the female parent Spike silk 4 to 5 days spit End, filigree vitality 7 to 8 days, 3 to 6 days after silking the strongest powder ability, seed setting rate