通过幼穗发育不同阶段施氮的效果比较,发现数量不多的氮肥,于小穗分化到花粉母细胞四分体初期追施,效益最高。而瘠薄旱地或高寒地带或早熟品种或氮肥较多时,则要提前些。分期追氮,薄地谷田以拔节始期多施、孕穗期少追为佳:肥地则前少、后多,且不宜过量,可得较好肥效,促使谷子稳产高产。 Through comparing the effects of nitrogen application in different stages of young panicle development, it was found that a small amount of nitrogen fertilizer had the highest benefit when spikelet differentiated into the early quartet of pollen mother cells. The barren dry land or alpine zone or precocious varieties or nitrogen fertilizer more time, we must advance. Staging of nitrogen, thin to Gutian to join more than the beginning of the jointing, booting less bust is better: less fertile before, after more, and should not be excessive, can be better fertilizer effect, prompting a steady and high yield millet.