在小麦高产栽培条件下,进行了优质小麦济麦20号春季氮肥后移增产保优效果试验。结果表明,起身肥易造成田间郁闭,小穗小花退化多,穗粒数少,粒重低、品质差;拔节肥能明显减少不孕小穗小花,增加穗粒数,提高产量、改善品质、增强抗倒伏能力;单一孕穗肥单位面积穗数和产量明显降低,但穗粒数和粒重增加,品质改善。 Under high-yielding wheat cultivation conditions, the high-yielding and yield-improving effect of high-yield wheat nitrogen fertilizer on wheat 20 in spring was conducted. The results showed that getting up easily leads to canopy depression, spikelets and florets degenerated, fewer spikelets, low kernel weight and poor quality; jointing fertilizer can significantly reduce the number of spikelets, increase grain yield and improve quality , And increased lodging resistance. The number of panicles and yield per unit area of ​​single booting spike decreased significantly, but the number of kernels per panicle and grain weight increased, and the quality improved.