Fertilizer application amount of corn
2025-09-13 23:00:21
Corn: To produce 100 kg of corn grain, approximately 2 to 4 kg of pure nitrogen, 0.7 to 1.5 kg of phosphorus, and 1.5 to 4.0 kg of potassium are needed. If the expected yield is 400 kg per mu, it's recommended to apply an average of 40-60 kg of ammonium sulfate or a similar nitrogen fertilizer per mu. For phosphorus, 40-60 kg of superphosphate (with 10% to 16% effective content) should be used, or alternatives like heavy calcium phosphate (containing 36% to 52% active ingredients) or calcium magnesium phosphate (12% to 16% active ingredients). For potassium, 6 to 10 kg of potassium sulfate (48% to 52% active ingredient) or potassium chloride (50% to 52%) is typically required. Alternatively, wood ash can be used as a potassium source, with 40-60 kg per mu (dry and free from impurities).
When deciding on the fertilization rate for corn, several factors must be taken into account, including the type of corn being planted, its variety characteristics, the desired yield level, and the condition of the soil and local climate. It’s important to note that during the early seedling stage, corn plants are small and grow slowly, so their nutrient uptake is relatively low. However, as the plant enters the jointing and booting stages, growth accelerates, and both vegetative and reproductive development occur simultaneously, leading to a significant increase in nutrient absorption. After the vegetative growth slows down, the plant’s ability to take up nutrients decreases substantially, and nutrient demand drops significantly.
Proper timing and balanced application of nutrients are crucial for maximizing yield and ensuring healthy plant development throughout the growing season.
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