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在氮肥供应充足而缺磷、钾时,易造成植株叶色浓绿,茎叶繁茂,体内糖代谢受阻,叶及茎秆内的糖分增加,转动给雌穗的糖相应减少,使得雌穗因营养不足而不能发育成果穗,易形成玉米空杆。要科学施氮,普施磷、钾肥,补施硼、锌等微量元素,促进花器发育。要求每亩施过磷酸钙25～30千克,钾肥5~7.5千克,均作基肥一次性施入。氮素追肥要轻施苗肥,巧施拔节肥,重施攻苞肥,酌施粒肥。
In the supply of adequate nitrogen and phosphorus, potassium, easy to cause plant leaf color dark green, stems and lush, the body of blocked glucose metabolism, leaves and stems of the sugar increase, turn the ear to reduce the corresponding sugar, making the ear causes Undernutrition can not develop fruit ear, easy to form corn empty pole. To scientific nitrogen, phosphorus, potassium, boron, zinc and other trace elements, to promote flower development. Requirements per acre applied calcium phosphate 25 to 30 kg, potassium 5 to 7.5 kg, are used as a single base fertilizer. Nitrogen top dressing Miao Fei, Qiao Shi section fat, re-Shi attack Baobei, discretion granulation fertilizer.