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为探讨杂交水稻春制收割后 ,再生制种的亲本生育规律及其高产配套技术措施 ,1998年以 V2 0 A×密阳 46组合为材料 ,对其亲本收割日期、留桩高度及收割后的施肥时间进行了不同处理研究。结果表明 :生育期长的亲本应先割 ,生育期短的亲本后割 ,间隔时间因组合不同而异 ;留桩高度以 10～ 2 0 cm为宜 ;春制收割后要及早追肥 ,以收割当天或第二天追肥较合适。在此基础上 ,提出了再生高产制种的配套技术措施。
In order to explore the law of parental reproduction and its high-yielding supporting measures after spring harvesting of hybrid rice, the combinations of V2 0 A × Minyang 46 in 1998 were used to study their parents’ harvesting date, pile height and postharvest Fertilization time for different treatment studies. The results showed that parents with long growth period should cut first and then cut with shorter growth period. The interval time varies with different combinations. The height of the pile should be 10 ~ 20 cm. After spring harvest, Dressing the next day or more appropriate. On this basis, put forward the technical measures for seed production of high-yielding and regeneration.