小麦从拔节到倒3叶出生时追施的肥料称为拔节肥。拔节肥能减少退化小穗和小花数,增加小花分化的强度,缩小小花之间发育进程上的差距,特别能增加一个小穗中第3、第4朵小花的结实率,从而增加总的结实粒数;拔节肥还能巩固有效分蘖、增加穗数,具有促花保花作用,是提高每穗结实粒数的关键肥;拔节肥还能 Wheat from the jointing to the next 3 leaves when topdressing fertilizer called jointing fertilizer. Jointing fertilizer can reduce the number of degenerated spikelets and florets, increase the intensity of floret differentiation and narrow the developmental gap between florets, and in particular, increase the seed setting rate of the third and the fourth florets in one spikelet, thereby increasing the total seed setting Grain number; jointing fertilizer can also consolidate effective tillering, increase the number of spikes, with flower and flower protection effect, is to increase the number of grains per spike seed key fertilizer; jointing fertilizer can