一、追施粒肥玉米在穗期追肥不多,后期有脱肥现象时,应追施粒肥,促使玉米增加粒重高产。要掌握早施、适量的原则,一般每667平方米追施8～10千克碳酸氢氨为宜。 First, topdressing granule Corn dressing in the spike is not much, the latter part of the phenomenon of fattening should be topdressing granulation, prompting increased grain yield and high yield of corn. To master as early as possible, the amount of principle, generally topdressing 8 to 10 kg of bicarbonate per 667 square meters is appropriate.