The best formula for corn fertilizer

Special fertilizer for corn is a one-time fertilizer and does not require additional topdressing. In fact, no matter what fertilizer you choose, the ultimate goal is to increase yield. It depends on soil conditions. After all, soil conditions vary from place to place, and the nitrogen, phosphorus and potassium content are also different. Let’s talk about the best formula for special fertilizer for corn.

1. The best formula for corn fertilizer

1. Special fertilizer for corn

(1) Corn fertilizer is a one-time fertilizer that does not require topdressing and is a long-lasting, stable, high-concentration corn-specific compound fertilizer.

(2) Formula 1: 30-35 parts of ammonium chloride, 4.5-5.5 parts of ammonium sulfate, 20-22 parts of ammonium phosphate, 20-25 parts of urea, 1-1.5 parts of ammonium carbonate, 10-12 parts of potash fertilizer, and 6-7 parts of additives.

(3) Formula 2: 60-70 parts of potassium nitrate, 30-50 parts of potassium dihydrogen phosphate, 70-100 parts of urea, 1-2 parts of 2,4-D, 1‑2 parts of 4-iodophenoxyacetic acid, 1‑2 parts of borax , 1‑2 parts of copper sulfate, 1‑2 parts of manganese sulfate, 1‑2 parts of zinc sulfate, 1‑2 parts of ammonium molybdate, and 1‑2 parts of ferrous sulfate.

2. Formula design of special fertilizer for corn

(1) Nitrogen

Generally, the amount of nitrogen fertilizer applied to summer corn is 8-10.7 kg/mu, the amount of nitrogen fertilizer applied to spring corn is 10-13.3 kg/mu, and the amount of nitrogen fertilizer applied to edible sweet corn is 6.7-9.3 kg/mu.

(2) Phosphorus

① For early-maturing varieties of corn, the amount of phosphorus fertilizer applied is 3.3-5.3 kg/mu, and for late-maturing varieties of corn, the amount of phosphorus fertilizer applied is 4.7-8 kg/mu.

② If the phosphorus content in the soil is between 0.9-1.7 mg/kg, the amount of phosphorus fertilizer applied is 3.3-6.7 kg/mu (late-maturing varieties) or 2.3-5 kg/mu (early-maturing varieties). If the phosphorus content in the soil is between 1.8-3.2 mg/kg, the amount of phosphorus fertilizer applied is 3.3 kg (late-maturing varieties) or 2.3 kg/mu (early-maturing varieties). If the phosphorus content in the soil is greater than 3.2 mg/kg, no phosphorus fertilizer is required.

(3) Potassium

① For early-maturing corn varieties, the amount of potassium fertilizer applied is 2.7-4.7 kg/mu, and for late-maturing corn varieties, the amount of potassium fertilizer applied is 3.3-6.7 kg/mu.

②If the potassium content in the soil is less than 5-6.6 mg/kg, the amount of potassium fertilizer applied is 2.3-4.7 kg (late-maturing varieties) or 1.7-3.3 kg/mu (early-maturing varieties). If the potassium content in the soil is greater than 6.6 mg/kg, potassium fertilizer is not required.

(4) Calcium

If the soil is acidic with a pH below 5, apply 133.3-200 kg of lime powder per acre.

2. Which is better, corn-specific fertilizer or compound fertilizer ?

For corn, it is generally better to apply corn-specific fertilizer. The effective period of corn-specific fertilizer is very long (90-120 days). No topdressing is required during the growth period. It can be applied to the soil once as base fertilizer during sowing.

While extending the effectiveness of the fertilizer, corn-specific fertilizers coordinate the needs of the crop with the progress of nutrient release from the fertilizer, ensuring that the nutrient needs of corn at each growth stage are met.

The above is an introduction to the best formula for corn fertilizer. According to soil conditions and the fertilizer requirements of corn, you can scientifically mix nutrients such as nitrogen, phosphorus, potassium, and medium and trace elements to ensure the nutrient needs of corn at each growth stage.