Nitrogen fertilizer long-acting synergist and its application
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Nitrogen fertilizer long-acting synergist use precautions
1. If the mixture is used for a long time after mixing, the fertilizer will become sticky. Although it does not affect the fertilizer efficiency, it will cause inconvenience to fertilization.
2, the seed fertilizer isolation fertilizer once input, the amount of fertilizer is large, the salt ion concentration is high, easy to cause burning seedlings. Seeding and fertilizer isolation must be done when fertilizing. Generally, the fertilizer is 5-6 cm on the side of the seed.
3, depending on the soil application leakage and leakage of fertilizer plots generally do not promote the use of chemical fertilizers.
Introduce two fertilization formulas
1. Mix the three-element compound fertilizer with 15% nutrient content of NPK and ≥45% total nutrient content and long-acting synergist. That is, each 667 square meters with 45% compound fertilizer 20 kg + urea 15-17.5 kg + long-acting synergist 1 kg, mixed once after the bottom application. The formula can reduce the cost of 8-13 yuan per 667 square meters than the long-acting fertilizer produced by the fertilizer factory.
2. Mix directly with urea, granular phosphate fertilizer, potassium chloride and long-acting synergist. That is, every 667 square meters of granular phosphate fertilizer (12%) 30-40 kg + urea 15-20 kg + potassium chloride 5 kg + long-acting synergist 1 kg. Mix well before planting, once applied. The application of this formula can reduce the cost of 10-15 yuan per 667 square meters than the long-acting fertilizer produced by the fertilizer plant.