Spring corn fertilization should be light before heavy

Basal fertilizer: Spring corn should be dominated by basal fertilizer, supplemented by topdressing; farmyard fertilizers should be the mainstay, and chemical fertilizers should be supplemented; nitrogen fertilizer should be the main, and phosphate fertilizer should be the supplement; panicle fertilizer should be the main principle, and grain fertilizer should be the basic principle of fertilizer supplementation. 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. Generally, they are combined with autumn ploughing in the previous year. When basal fertilizer is applied, it should be uniformly mixed with the soil. If nitrogen fertilizer is used as a base fertilizer, it must be deepened to prevent loss of nitrogen. In phosphorus-deficient soils, 450-600 kg of calcium sulfate is applied per hectare; in potassium-depleted soil, 150 kg of potassium chloride is applied per hectare; in zinc-deficient soil, 15 kg of zinc sulfate is applied per hectare.

Fertilizer: Before spring sowing, a small amount of farmyard manure is used to match the appropriate amount of nitrogen and phosphating fertilizers or applied as a corn seed fertilizer.

Top-dressing: Spring corn is topped with fertilization in the form of “before light and heavy”, ie 1/3 of top dressing is applied before jointing of corn, and 75 to 150 kg of urea is applied per hectare. 3, topdressing urea 150-300 kilograms per hectare, to meet the needs of corn spikes spikelets, floret differentiation and grain formation phase of nutrients.

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