常说的孕穗肥，一般是指玉米进入大嗽叭口期以前的一次追肥。就麦套夏玉米而言，大约在播种后的４２天～４５天左右时间。玉米进入孕穗期是其吸收养分最多的时期，此时正是玉米雌穗小穗小花分化盛期，是决定果穗大小、籽粒多少的关键时期，也是玉米需肥的高峰期。这时重施... Often said booting spike, corn generally refers to a large cough before a top dressing. In terms of wheat summer corn, about 42 days after sowing ~ 45 days time. Maize into the booting stage is the period of its absorption of nutrients, this time is the ear of spikelets of corn ear differentiation, is to determine the size of the ear, the number of critical period of the kernel, but also the peak of fertilizer to be corn. At this time re-Shi ...