Fertilization technology for high yield corn fields

Fertilization of corn can be high-yield, but it is not fertilized. The more the better. In the process of fertilization, attention should be paid to the limitation of the minimum nutrient law. When the soil lacks certain nutrients, the other nutrients are not abundant, and the crops cannot grow well, and the crop yield is within a certain limit. Increase or decrease and change. Therefore, reasonable formula fertilization techniques must be used. Formulated fertilization is the amount of nutrients that need to be absorbed according to the production target under the conditions of organic fertilizer, the ability to provide nutrients such as nitrogen, phosphorus and potassium in the soil and the utilization rate of the applied fertilizer, and calculate the required The appropriate amount and ratio of nitrogen, phosphorus, potassium and micro-fertilizer are used for fertilization.

Formulated fertilization can increase the yield of fertilizer by adjusting the proportion of nutrient application without increasing the investment of chemical fertilizer. Therefore, reasonable formula fertilization is an important measure to reduce the cost of fertilization and achieve high yield and quality of corn.

Reasonable formula fertilization, often used in the local production, to produce the principle of nitrogen, phosphorus and potassium supplementation. Under normal circumstances, the level of middle-level fertility is 12-15 kg per mu. Phosphorus pentoxide 4-5 kg, potassium oxide 5 kg; high yield level, 15-18 kg of pure nitrogen per mu, 7-9 kg of phosphorus pentoxide, 10 kg of potassium oxide. Phosphate potassium fertilizer was applied as a base fertilizer or a 5-leaf seedling at a time, and nitrogen fertilizer was applied twice at jointing (25 days after sowing) and at the big bell stage (45 days after sowing). The first fertilization amount accounts for 30%-40% of the total nitrogen fertilizer amount, and the second fertilization amount accounts for 60%-70% of the total nitrogen fertilizer amount.

Author: Wang Chunyi

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