Fertilizer types commonly used in vegetable fertilization
(1) Quick-acting fertilizers Commonly used quick-acting fertilizers include urea, ammonium nitrate, potassium nitrate, potassium dihydrogen phosphate, potassium sulfate, and potassium chloride. This type of fertilizer has a relatively high water solubility and can be directly hydrolyzed into water when watering.
(2) Compound fertilizer Commonly used compound fertilizers mainly include diammonium phosphate, chlorophosphorus potassium compound fertilizer, ammonium phosphorus and potassium compound fertilizer. The water solubility of this type of fertilizer is relatively poor. After fertilization, there is often more residue on the ground. It is generally required to inject the fertilizer into the water 2-3 days before fertilization, so that the active ingredients in the fertilizer are fully dissolved in the water and fertilized. When the supernatant is taken, it is poured into the ground with water.
(3) Organic fertilizers Organic fertilizers commonly used in rushing and fertilizing mainly include manure, pig urine and chicken manure and cake fertilizer with high content of quick-acting ingredients. When the fertilizer is applied, the organic fertilizer is fully foamed for 10-15 days. When the water is poured, the supernatant is taken into the ground with the water. The ammonia in the organic fertilizer is easy to volatilize, causing the vegetable to be "ammonia poisoning". Therefore, the concentration of the fertilizer solution should not be too high, and the color is light and light.
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