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本文根据1992年在濉溪、阜阳等地进行的田间试验结果,研究分析了氮肥不同运筹方式与夏玉米产量形成及籽粒灌浆的关系。结果表明,在亩总施氮量20公斤条件下,对亩产量贡献大小顺序为苗肥>穗肥>粒肥,对穗粒数和千粒重影响大小顺序分别为苗肥>粒肥>穗肥和粒肥>苗肥>穗肥。穗肥与空秆率呈极显著负相关。籽粒千粒重增长符合Logistic曲线。氮肥分三次施用有利于加大籽粒灌浆强度。总结出本试验条件下,提高粒重和产量的氮肥合理运筹方式为苗肥40%、穗肥40%、粒肥20%。
Based on the field experiments conducted in 1992 in Fuxi, Fuyang and other places, the relationship between different N application modes and the formation and grain filling of summer maize was studied. The results showed that the order of the contributions to the mu yields under the total nitrogen application rate of 20 kg mu was Miao-hai> Pan-fertilization> Miao fertilizer> panicle fertilizer. Panicle fertilizer and empty stalk rate was extremely significant negative correlation. Thousand grain weight growth in line with the Logistic curve. Nitrogen fertilizer applied three times is conducive to increasing the grain filling strength. It is concluded that the reasonable operation mode of nitrogen fertilizer to increase grain weight and yield is 40% of Miao, 40% of panicle and 20% of granule under the experimental conditions.