1 严格把好隔离关隔离标准坚持200m 内无其他品种,500m 之内无粳、糯稻,花期隔离25d 以上,制种田四周都要严格要求,确保优质高产。2 合理安排播差,确保安全抽穗期适期播种主要是为了保证丰两优制种生育期处于适宜的气候条件,既要选择一个最佳的扬花授粉期,更要选择一个安全的育性转换期; 1 strict isolation of good isolation Do not insist on the other 200m within the species, no japonica within 500m, glutinous rice, flowering more than 25d, the system of farming around the strict requirements to ensure high quality and high yield. 2 Reasonable arrangement of sowing to ensure safe Heading Appropriate sowing is mainly to ensure that the growth of Fengliangyou is in suitable climatic conditions, it is necessary to choose the best flowering period, but also to choose a safe fertility conversion period;