Seed-cutting block cutters are sterilized with 70% alcohol or 5% Suer water. The healthy seed potatoes are cut vertically, and each plant ensures 1 or 2 robust buds. Mechanical sowing, each weighing 40 to 50 grams is appropriate. Manual sowing, each weighing 35 to 40 grams is appropriate, in order to prevent the spread of the virus, to promote the whole sowing. Seed dressing, boring seeds and seed coating 100 kg of seed potatoes are sterilized with chlorothalonil 0.1 kg and 1 kg of talcum powder and trace elements (such as molybdenum, boron, copper, zinc and magnesium) and placed in a ventilated place 1 to 2 Days, sows can be sown after wound healing. It is best to apply the treatment of seed coating, which can effectively prevent rotting after sowing, sterilization, reduce field incidence, and increase the rate of emergence. 2. Using large ridge cultivation Potato 80-90 cm ridge standardization cultivation techniques is a new cultivation technique measure based on the successful experience of foreign countries, combined with potato growth and development characteristics. The focus is to promote the “90 cm large ridge cultivation model†with a ridge width of 90 cm, a ridge width of 40 cm, and a ridge height of 25 cm. The ridge structure of this type of soil is loose, and has strong fertility, which is conducive to the development of roots, increases the rate of tuberculosis, and has the advantages of light and ventilation, conservation of soil moisture, drought resistance, and prevention of floods. It also reduces the occurrence of early and late blight and effectively improves potato growth. The yield and quality of the product can increase the yield by more than 50%, and the rate of large potatoes can be increased by more than 20%. It is a practical high-yielding cultivation technology model. 3. Balance fertilization to ensure yield Potato is a crop that requires a large amount of fertilizer. To achieve high yields, it is necessary to fertilize more. If the yield per mu is more than 3 tons, it must be more than a kilogram of fertilizer per mu. In order to give full play to the fertilizer effect and increase the fertilizer utilization rate, basic fertilizer must be lightly applied. Heavy fertilizers are applied and fertilizers are applied in phases to prevent waste of fertilizers and increase fertilizer utilization. At the same time, the three major elements of nitrogen, phosphorus and potassium are reasonably matched and applied proportionally. The specific approach is as follows: Increase the use of organic fertilizer with 15 tons of fertility and high-quality organic fertilizer per hectare as base fertilizer, combined with one-time application of soil preparation. The base fertilizer is applied on the basis of 1 cubic meter of organic fertilizer in Mushi, applying quick-acting fertilizer. The ratio of urea, diammonium phosphate and potassium sulfate in the growth stage of seedlings is 3.4:1:3. During sowing, the urea, diamine and potassium sulfate in the mu are 10 kg, 3 kg and 9 kg, respectively, to guarantee the growth of the seedling itself. Developmental needs. The period of topdressing potato is the period when the potato needs the most amount of fertilizer. At this time, topdressing is required to meet the needs of tuber enlargement and to prevent premature aging of the seedlings due to defertilization. The ratio of urea, diammonium phosphate and potassium sulfate is 1.5:1:3.5, suitable for topdressing, and the tuber diameter enlarges to 2 to 3 centimeters, which means that the plant growth center has been transferred from vegetative growth to reproductive growth. Before the arrival of the rainy season around June 20, mix the three types of fertilizers in front of the ground and apply them on both sides of the ridge body. After fertilizer application, cover the fertilizers in time to prevent loss. The dosages of urea, diammonium phosphate and potassium sulfate were 15 kg, 10 kg and 30 kg, respectively. It can also be increased or decreased appropriately according to this ratio. In addition, other fertilizers can also be applied, but the ratio of nitrogen, phosphorus and potassium cannot be changed. Foliar dressing in the tuber formation period and tuber expansion period, the urea 0.5%; potassium dihydrogen phosphate 0.3%, add trace elements, combined with spraying pesticides for foliar dressing 3 to 4 times, interval 5 to 7 days. 4. To achieve multiple layers of potato Pre-emergence, once again, to increase the temperature of both grass and herbicides. A deep ploughing and shallow earthing are carried out on the top of the shoots. After the seedlings are flushed, shovel them in time, and then use a plough (less soil) to increase the ground temperature, reduce the evaporation of water, shovel two times in the hairy period, three times, and multiply the soil, so that the ridges are narrow, the ridges are wide, and the ridges are loose. Soil, to achieve multiple layers of potato, conducive to tuber enlargement. 5. Strengthen disease prevention The main diseases of late blight potato, starting on June 20, with 25% Amisida 500 ~ 800 times spray; Kelu, Rhizoctonia 1.5 kg / ha 3,000 times the water spray, spray every 7 to 10 days , spray 5 to 6 times. Viral disease Potato virus disease mainly includes common mosaic disease, macular mosaic disease, leaf rolling disease, purple top and shrinking mosaic. Prevention and control of potato virus disease is mainly based on prevention, such as the use of qualified virus-free seed potatoes and disease-resistant varieties, improved cultivation practices, while cutting off the source of infection, chemical control of locusts and so on. Chemical control can be used anti-virus 1 or 2% bacteria grams of grams of 300 grams of liquid spray, have a certain control effect. Ring rot disease selection of disease-resistant varieties and the establishment of disease-free fields, cutting knife disinfection and pharmaceutical soaking. When diced, the cutting knife is disinfected with potassium permanganate concentration of 5ppm. Seed potatoes are treated with 75% dexamethasone wettable powder prior to sowing, and 0.28 kilos of medicinal powder per 100 kilograms of seed powder are added. Appropriate amounts of dry soil are used for seed dressing. Remove the diseased plant. 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Seed germination of seed germination 15 to 20 days before sowing, cellar, placed at a temperature of 13 ~ 15 °C, dark tile 2 to 3 layers, the seed potatoes gradually exposed to scattered light, turning every 2 to 3 days Seed full of light, germination of purple buds, when the buds grow to 0.5 ~ 1 cm, you can cut, ready to sow. When germination, avoid direct sunlight, rain and frost, etc., and eliminate disease and rotten potatoes.