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在大田和盆栽试验条件下 ,研究杂交籼稻汕优 63和 4个中粳品种武育粳 3号、951 6、952 2及镇稻 88对氮肥施用期的反应。结果表明 :基肥、分蘖肥和穗肥 3种施肥方法的增产作用及肥料的利用率 ,汕优 63以分蘖肥为最大 ,武育粳 3号以穗肥为最大 ,而 952 2则在 3种施肥方法中差异不大。在等量氮肥作促花肥、保花肥和粒肥的 3种不同施肥时期中 ,氮肥的增产作用及肥料的利用率 ,汕优 63以粒肥为最大 ,促花肥为最小 ;武育粳 3号和 951 6以促花肥为最大 ,粒肥为最小 ;952 2和镇稻 88等则以保花肥最大。并对不同品种对氮肥施用期反应的差异进行了讨论。
Under field and pot experiment conditions, the responses of indica hybrid rice Shanyou 63 to four middle-maturing varieties Wuyujing 3, 951 6,952 2 and Zhenyao 88 to nitrogen application were studied. The results showed that basal fertilizer, tillering fertilizer and panicle fertilizer increased the yield of three kinds of fertilizers and the utilization rate of fertilizer. The highest tillering was in Shanyou 63, the largest was in Wuyujing 3, and the second was in 952 2 There is not much difference in fertilization methods. In the three different fertilization periods with the same amount of nitrogen fertilizer as fertilizer, fertilizer and grain fertilizer, the increase effect of nitrogen fertilizer and fertilizer utilization rate were the highest in Shanyou 63 and the least in the flowering and fertilizing. Wuyujing 3 and 951 6 to promote flower fertilizer is the largest grain fertilizer is the smallest; 952 2 and Zhenda 88, etc. to protect the largest flower fat. The differences of responses of different varieties to nitrogen application period were also discussed.