In potato production, organic fertilizer is mainly used as a base fertilizer with low-concentration compound fertilizer. In the season of vigorous growth, top-dressing nitrogen fertilizer can maintain the medium-high yield. How to get high yield and quality of potato? First of all, the nutritional characteristics of potato are the growth of shoots and leaves in the early stage, and the growth of underground tubers in the later period. The demand for N, P, and K nutrients is greater, and the ratio of NPK supply to the three is 1:0.5:2.5. According to this law of nutritional demand, potassium deficiency is serious in the soil in the south, in particular, potassium fertilizer should be added, and nitrogen fertilizer should be used in combination to adjust nitrogen and potassium balance. In the northern soil, the available potassium is higher than that in the south, but many soils have phosphorus deficiency. Currently, the application of potassium fertilizer is not widespread. After years of exhaustion, the soil potassium has already shown its ability to make ends meet. Therefore, attention should be paid to increasing nitrogen fertilizer. Potash fertilizer and phosphate fertilizer. In the potato production, the appropriate ratio of nitrogen, phosphorus and potassium fertilizers is 1:0.5:0.6 in the northern region and 1:0.4:0.9 in the southern region. If the yield per mu is about 1500 kg, it is recommended that the amount of nitrogen fertilizer be used to purify the nitrogen by 10-12 kg/mu. In the fertilization method, base fertilizer and top dressing are used. The distribution of NPK fertilizer is 50% nitrogen fertilizer, all phosphate fertilizers, and most of potassium fertilizers in base fertilizers. Fertilizer varieties can be selected compound fertilizer, can also use single fertilizer with. Topdressing uses 50% nitrogen and a small portion of potassium. In the fertilization position, the basal fertilization is applied before the planting, or the depth is required to be about 15 cm. Top dressing is applied between the rows or the side of the plant. The fertilizer is buried at a depth of 5 to 8 cm. After fertilizing, it can be filled with water and covered with soil. When one-time top dressing is applied, the time should not be too early, and it will be carried out after the potato block enters into the expansion period. Early application of fertilizers, especially if they follow a large amount of nitrogenous fertilizers, will cause problems in the growth of the roots of the above-ground parts of the ground. Disposable Face Mask,Disposable Sterile Face Mask,Medical Surgical Mask,Medical Disposable Face Masks Jiangyin Huashi Medical Equipment Co.,Ltd , https://www.medicalwellcare.com