Corn basal fertilizers should be dominated by organic fertilizers, and basal fertilizers generally account for about 60%-70% of the total fertilizer. When the basal fertilizer is sufficient, it can be sown and ploughed back into the soil. If the fertilizer is insufficient, it can be applied in full or in a hole. Concentrated fertilization is conducive to crop absorption, reducing loss and high fertilizer utilization. Phosphorus and potassium fertilizers have a good basal fertilizer effect. Superphosphate is used as a base fertilizer. The amount of 15-25 kg per mu should be applied after mixing with organic fertilizers or composting. Potassium sulfate is used as a base fertilizer, with a dosage of 7.5-10 kilograms per mu, which can be mixed with organic fertilizers. Since early sowing of summer sowing crops is the key to increase production, summer corn is often too late to use base fertilizer. Basal fertilizers are generally applied to sowing of the top crop (such as wheat), and the nutrients required for the subsequent supply of summer corn are used. Under the premise of not affecting early sowing, the use of decomposed, high-quality farmyard fertilizers and the use of ditch-applied and cave-casting methods to apply base fertilizers to summer corn are beneficial to increase production.
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