The fertilization of spring corn should be "light in front and heavy in back".

Base fertilizer: spring corn is based on the basic fertilizer, supplemented by topdressing; farm fertilizer, supplemented by chemical fertilizer; nitrogen fertilizer, supplemented by phosphate fertilizer; ear fertilizer, supplemented by grain fertilizer. Base fertilizer should generally account for about 70% of the total fertilization, and most phosphate fertilizers should also be applied in combination with base fertilizer, usually in combination with autumn ploughing in the previous year. When applying base fertilizer, it should be evenly mixed with soil, generally applying 37.5-60 tons of farm manure per hectare. If nitrogen fertilizer is used as base fertilizer, 375 kg of ammonium bicarbonate or 150 kg of urea can be applied per hectare. It must be applied deeply to prevent the loss of nitrogen volatilization. In phosphorus-deficient soils, 450 kg of calcium applied per hectare; 150 kg of potassium chloride per hectare in potassium-deficient soils; and 15 kg of zinc sulfate heptahydrate per hectare in zinc-deficient soils. Seed fertilizer: before spring sowing, use a small amount of farm manure combined with appropriate amount of nitrogen and phosphorus fertilizer strip or hole application, as corn seed fertilizer. Topdressing: topdressing of corn is an important measure for high-yield cultivation of corn. Because the growth period of spring corn is longer, the seedling stage grows slowly and absorbs less nutrients, the topdressing of spring corn mostly adopts the fertilization method of "light in the front and heavy in the second", that is, before jointing, the amount of urea is 75kg / ha, 150kg / ha and 2cm / ha, respectively, so as to meet the nutrient needs of spikelet, floret differentiation and grain formation stage of maize. The experimental results show that the yield of spring corn is 13.3% higher than that of "light before heavy" fertilization.