base fertilizer Spring corn should be based on basal fertilizer, supplemented by topdressing; farmyard fertilizers should be the mainstay, supplemented by chemical fertilizers; nitrogen fertilizers should be the main, and phosphate fertilizers should be supplemented; panicle fertilizers should be the main principle, and grain fertilizers should be the basic principles for supplementing fertilizers. 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 used in combination 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 volatilization. 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 fertilizer is applied per hectare. Fertilizer Before spring sowing, a small amount of farmyard manure was used to match the appropriate amount of nitrogen and phosphatized fertilizer and applied as a corn seed fertilizer. top dressing Spring corn is top-dressed with a “pre-light and heavy†fertilization method, ie applying 1/3 of topdressing before corn jointing, applying 75-150 kg of urea per hectare, and top dressing 2/3 during the big bellmouth period. Each hectare topdressing urea 150 to 300 kilograms, to meet the ear spikes, florets differentiation and grain formation phase of the maize needs of nutrients. The experimental results confirmed that the spring maize used the “before light weight and heavy weight†fertilization method, which increased the yield by 13.3% compared with the “pre-heavy and light†fertilization method.
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Spring corn fertilization should be light before heavy
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