As the main vegetable of urban and rural residents, potato contains a large amount of starch. The nutritional value of protein is also high, and it contains many kinds of vitamins and inorganic salts. Because of its full nutritional content, eating is very easy to digest and absorb deeply loved. As various diseases of potato can be carried by seed potatoes, the quality of the potato block and the spread of virus bacteria are affected, which brings huge losses to the growers. In recent years, the research and promotion of high-yield cultivation techniques covered by virus-free potato mulch has achieved the objectives of increasing temperature, keeping grasshoppers, pressing grass, labor saving, cost-saving, increasing yield, and increasing efficiency. The cultivation points are as follows: 1. Apply base fertilizer Refined soil preparation 1. Potato root expansion and ground stem growth require higher oxygen levels than general crops, should be selected for organic-rich sand or sandy loam soil cultivation, deep tillage before sowing, combined application of organic fertilizer 2000 kg/mu, diammonium 12.5 kg, urea 7.5 kg. Deep ploughing of the land, careful squeaking, there is no large soil waste in the soil plough layer, to the soil finely divided, there is no plant residue roots, broken plants, stones, bricks and tiles in the cultivation layer. 2. The mulching cultivation requires pods, which are 10-15 cm in height, 60-70 cm in width, slightly higher in the center, gentle slopes on both sides, and should not be turned into right angles, north-south direction, and are not easily trampled after ramming. To protect the soil loose and smooth surface. Second, potato seed treatment strictly selected seed potatoes, do a good job in processing seed potatoes. First of all, we should use enough grades of virus-free seed potatoes, and at the same time, we must strictly remove sick and bad-shaped fries, especially potato cassava with mild disease. Weight requirements of more than 30 grams when cutting buds, but also to be uniform, the best end of the buds do not have to use. The cut buds should not be piled too thick. The stacking time should not be too long. The cut buds can be immersed in fungicides such as thiophanate-methyl and talcum powder to dry the shoots as quickly as possible to prevent infection. Third, timely planting, rational close planting 1. Production generally use the temperature and light treatment to eliminate the seed potato dormancy, that is, 30-50 days before sowing, the seed potato first placed in a dark room of 2O degrees, so that the activities of the potato enzymes enhanced decomposition Accelerate, promote germination, and then placed in the light, so that the buds will be strong, the potato planting by 15 centimeters, about 8000-10,000 strains of acres, sowing in a deep hole within 10 cm, and then covering 1-2 cm fine soil. 2. After the soil preparation for planting is completed, cover should be followed immediately to help maintain soil moisture. When the film is covered, it must be stretched and laid flat. The mulch film should be close to the surface. Each mulching film should be tightly compacted with soil so that the mulch can be stretched and stretched, and the mulch can be tightly pressed into the seam. Ditch is not covered and reserved for water storage. Fourth, field management Before the potato seedlings will be top soil, take the earth from the trenches, along the ridges, 4-5 cm of wet soil on the bed, so that the film inside and outside the membrane temperature and humidity are consistent, so that the potato seedlings themselves break the membrane Emergence, this can prevent burning seedlings, but also can reduce the phenomenon of potato heads. Less water is needed during the potato seedling stage and the hair growth stage. The water requirement during the potato stage is relatively large. When watering, it is decided according to the seedling condition, soil, and rainfall conditions. When watering, avoid bountiful flooding to prevent rotten potatoes or dead seedlings. Potatoes usually need to be grown in the growing season, but to prevent the green head, soil can be dig deep from the bed ditch before the tuber enlarges, and the soil can be properly cultivated on the base of the potato seed on the membrane bed. V. Prevention and control of insect pests General film coverage can promote the growth and development of potatoes, increase their own disease resistance, but also according to the law of the occurrence of pests and diseases, actively adopt biological and chemical methods, strict control of pests and diseases, the main diseases such as late blight Once it occurs, use 25% carbendazim 150 grams per acre, watered 50 kilograms, spray control. The locust transmission resulted in the degenerative nature of the disease, and 40% omethoate could be sprayed regularly for 2000 times. VI. Timely harvesting, storage When the base leaves of the potato begin to turn yellow and fall, parts of the plant continue to feed nutrients to the tubers. The length of the potato is subject to climatic conditions, species, etc. It can generally be harvested in about 35 days. After harvesting, it was first stored at 10-20 degrees Celsius for about 14 days to facilitate the complete formation of the plug layer.