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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高产制种策略是: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-yielding seed production of FengYou559 was proposed: parents should take care of their spikes, fight big spikes and improve the rate of out-crossing and seed-setting. 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 .