1.安排好父母本播差期和播种期。安排好父母本播差期和播种期是争取花期相遇,提高制种产量的重要保证。据近几年制种实践,母本的播始历期为62天左右,父本为82～85天,父母本的播差期为20～21天,叶差5.7±0.2片。根据这个播差期,安排第一期父本在6月18日播种,第二期在5月26日播种。因为我们应用的母本是陈种子。故母本安排 1. Parents arranged for broadcast and sowing period. It is an important guarantee for seeding florescence and improving seed production in arranging for the parents to broadcast the sowing date and sowing date. According to seed production practice in recent years, the starting date of the female parent is about 62 days, the male parent is 82 to 85 days, the parental sowing date is 20 to 21 days, and the leaf difference is 5.7 ± 0.2 pieces. According to this sowing date, the first issue of paternity planted on June 18 and the second planted on May 26. Because the mother we use is the seed of Chen. So mother arrangement