Spring corn fertilization master these 5 words

The first is to extensively apply organic fertilizers to increase soil fertility. Generally, the input amount of organic fertilizer per mu should not be less than 4,000 kg.

Steady and stable application of nitrogen fertilizer

In high-yielding fields with a yield of 500 kg or more, the nitrogen application rate per acre should be stabilized at 9-12 kg. For a medium yield field with a yield of 300-500 kg, the nitrogen application rate per acre should be stabilized at 7-10 kg; the low yield field with a yield per unit of less than 300 kg. Nitrogen per acre should be stable at 6-8 kg. At the same time, reasonable adjustment of the application period and methods to improve the use of nitrogen fertilizer.

Controlled application of phosphate fertilizers

In the high, medium and low fields of three different yields, the appropriate amount of phosphate fertilizer per acre should be controlled within the range of 7 kg, 6 kg and 5 kg, respectively. Spring corn phosphate fertilizer is generally used as base fertilizer.

Increased Potassium Fertilizer

With the rapid decline of soil available potassium, the area of ​​potassium deficiency continues to expand. In order to meet the demand of corn for the growth of potassium, potassium fertilizer must be fully applied. The suitable amount of potash fertilizer in high-yielding fields is about 8 kg per mu, about 7 kg in middle-quality fields, and about 6 kg in low-yield fields, and the ratio of nitrogen, phosphorus, and potassium should be 1:0.5:0.6.

Supplementary application of fertilizer

Due to the improvement of corn varieties, the reform of the farming system and the changes in the fertilization structure, the symptoms of zinc deficiency, especially in maize, have appeared on a large scale. Supplementary application of corn and zinc fertilizer can be applied in corn soaking, coating, etc., and can also be commonly applied when corn is sown or during seed dressing. 1 to 2 kg of zinc sulfate can also be applied in corn special fertilizer or corn seedling leaf Surface spray, add zinc fertilizer spray fertilizer.

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