What are the technical points of tomato fertilization

The ratio of nitrogen, phosphorus and potassium required by tomatoes is 1:0.2:1.7. Tomatoes like fertile soil. Before tomato fruit setting, the demand for nitrogen fertilizer is large, and after fruit setting, the demand for nitrogen fertilizer drops sharply, and the demand for potassium fertilizer soared. According to this physiological characteristic of tomatoes, in fertilization, attention should be paid to supplying different fertilizers in time at each growth and development stage, so as to reduce the problem of physiological deficiency of tomatoes caused by unreasonable fertilization.