(1) Basal fertilizer Spring corn is mainly based on basal fertilizer, supplemented by topdressing; farmyard manure is mainly supplemented by chemical fertilizer; nitrogen fertilizer is dominant, phosphate fertilizer is supplement; panicle fertilizer is the main principle, and grain fertilizer supplements the basic principle of fertilization. Basal fertilizers should generally account for about 70% of the total amount of fertilizers. Most of the phosphate fertilizers should also be applied in combination with basal fertilizers. In general, they should be combined with autumn ploughing in the first year. When basal fertilizer is applied, it should be uniformly mixed with the soil. Generally, 37.5-60 tons of fertilizer is applied to the basal fertilizer per hectare. If nitrogen fertilizer is used as base fertilizer, 375 kg ammonium bicarbonate or 150 kg urea can be applied per hectare. Be sure to deepen it to prevent loss of nitrogen volatilization. In phosphate-deficient soils, 450-600 kg of calcium phosphate is applied per hectare; in potassium-depleted soil, 150 kg of potassium chloride are applied per hectare; in zinc-deficient soil, 15 kg of zinc sulfate is applied per hectare of hemihydrate.

(2) Before spring sowing of seed fertilizer, use a small amount of farmyard fertilizer to reconstruct the appropriate amount of nitrogen and phosphatized fertilizer and apply it as a corn seed fertilizer.

(3) Fertilizer Fertilizer Fertilizer is an important measure for high yield cultivation of corn. Due to the long growth period of spring maize, slow growth at seedling stage, and less absorption of nutrients, spring corn is often top-fertilized by the “pre-light and heavy” fertilization method. That is, 1/3 of top dressing is applied before maize jointing. Applying 75-150 kg of urea, applying 2/3 topdressing during the big bell mouth, 150-300 kg of urea per hectare, meeting the needs of spikelets, floret differentiation and grain formation stages of the maize ear for nutrients, experimental results It was confirmed that the method of fertilization with "pre-light weight and heavy weight" for spring maize was 13.3% higher than that with "pre-heavy and then light" fertilization.

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