After high-nitrogen compound fertilizer dissolves quickly, the high salt concentration of urea-based nitrogen in soil solution inhibits seedling elongation and root development. It can be seen that after applying the qualified fertilizer to the crop, it can produce good fertilizer efficiency, depending not only on the quality of the fertilizer itself, but also on whether the application method is appropriate. The application method includes three major factors: the application period, the application amount, and the fertilization position. How to grasp the fertilization technology? Pay attention to the following points:
1. When applying base fertilizer to corn, cotton and other field crops, the dosage is relatively large, generally in the range of 30-40 kg/mu, and the base fertilizer is a compound fertilizer containing more phosphorus and potassium, so the application method must pay attention to the application. The depth of the soil is 15-20 cm, which can ensure the safety of the seedling period and ensure the nutrient supply in the later stage.
2. The nitrogen in the compound fertilizer is active, and most of the high-nitrogen high-concentration compound fertilizer is urea-based nitrogen, which is water-soluble and quick-acting. If concentrated fertilization is too shallow or too much, it will not only cause the seedlings to burn, but also cause the risk of nitrogen loss. Therefore, the key technology for nitrogen fertilizer to be used as base fertilizer is: one must be applied deep, and the other should be appropriate. Based on this mechanism, nitrogen fertilizer should be applied as base fertilizer and top dressing twice; for high-nitrogen compound fertilizer, except for spring maize in northeast chert region, it is not suitable for one-time application in North China, especially in high temperature and rainy areas in the south. The base and top dressing should be applied separately. This not only enables high nutrient utilization, but also enables safe production.
3. Phosphate fertilizer is not active in the soil. The fertilization position should be applied in two layers. The fertilizer should be applied less and the base fertilizer should be applied in a deeper manner.
1. When applying base fertilizer to corn, cotton and other field crops, the dosage is relatively large, generally in the range of 30-40 kg/mu, and the base fertilizer is a compound fertilizer containing more phosphorus and potassium, so the application method must pay attention to the application. The depth of the soil is 15-20 cm, which can ensure the safety of the seedling period and ensure the nutrient supply in the later stage.
2. The nitrogen in the compound fertilizer is active, and most of the high-nitrogen high-concentration compound fertilizer is urea-based nitrogen, which is water-soluble and quick-acting. If concentrated fertilization is too shallow or too much, it will not only cause the seedlings to burn, but also cause the risk of nitrogen loss. Therefore, the key technology for nitrogen fertilizer to be used as base fertilizer is: one must be applied deep, and the other should be appropriate. Based on this mechanism, nitrogen fertilizer should be applied as base fertilizer and top dressing twice; for high-nitrogen compound fertilizer, except for spring maize in northeast chert region, it is not suitable for one-time application in North China, especially in high temperature and rainy areas in the south. The base and top dressing should be applied separately. This not only enables high nutrient utilization, but also enables safe production.
3. Phosphate fertilizer is not active in the soil. The fertilization position should be applied in two layers. The fertilizer should be applied less and the base fertilizer should be applied in a deeper manner.
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