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对杂交粳稻辽优5215制种中父本花期延迟措施的效应进行了研究,结果表明:在父本幼穗分化Ⅲ期采取控水、增N、施用多效唑、割叶等多种措施可以延缓父本幼穗分化进程,最大可延迟花期7d左右;单项措施的调花效果为割叶>施多效唑>增N>排水,排水效果不明显;多项措施的累加效应大于单项措施的效应,但其总效应小于各单项措施效应之和;过量增施N肥导致旺长效应,割叶、施多效唑皆对父本植株高度和单株颖花数有显著负向影响,过量增施多效唑易导致颖花退化,造成穗顶部秃尖,割叶、施多效唑与增施N肥结合有互补效应。
The effect of delayed parental flowering on hybrid Japonica hybrid rice Liaoyou 5215 was studied. The results showed that various measures such as controlling water use, increasing N, applying paclobutrazol The spike differentiation process of the spikelets could be delayed for about 7 days. The single flower regrowth effect was cut leaves> styloxazole> N> drainage, and the effect of drainage was not obvious. The accumulative effect of multiple measures was greater than that of single measures. However, The total effect was less than the sum of the individual measures; excessive application of N fertilizers resulted in the effects of Mongolian growth, and the effects of cutting leaves and applying paclobutrazone had a significant negative effect on the height of male parent plants and the number of spikes per plant. Flower degeneration, resulting in spike top tiptoe, cut leaves, combined with the application of N fertilizer with complementary effect.