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根据2003～2004年丰优559大面积制种实践和制种特点,提出丰优559高产制种策略,即父母本保足穗,争大穗,主攻提高异交结实率。相应的制种技术是合理安排播差期,确保花期相遇;培育壮秧,合理密植;加强肥水管理,培育高产群体;采取辅助措施,早喷重喷“九二○”,提高异交结实率。
According to the practice of seed production in FengYou559 from 2003 to 2004 and the characteristics of seed production, the strategy of high yield seed production of FengYou559 was proposed. The corresponding seed production techniques are to arrange the sowing period reasonably and ensure the flowering period meet; to cultivate the strong seedlings and close planting reasonably; to strengthen the management of fertilizer and water and cultivate high-yielding groups; to take supplementary measures to re-spray “920” early in the morning to increase the outcrossing rate .