With the pursuit of health care nowadays, the variety of Purple Potato has attracted more and more people's attention and love. Therefore, in order to meet market demand, it is more important to improve economic efficiency and achieve high-yield cultivation of purple Sweet Potato. The following is a summary of the high-yield cultivation techniques of purple sweet Potato: First, select good varieties, select seed potatoes The choice of seed potatoes should be based on the specific use. Generally choose excellent varieties with strong resistance, drought and tolerance, and less pests and diseases. The current purple sweet potato varieties mainly include purple potato king, new purple, Ling purple, group purple No. 1, Jingshu No. 6, Yan Zi 263, Yan Zi 176, Violet, Jihe and so on. Among them, the fresh foods "Ning Zishu No. 1" and "Ning Zishu No. 4" are used to process the processed variety "Japan Yu Zi (Nonglin 47)", and the dual-use variety "Ecza No. 8" and "Mountain Purple" ". The selection of seed potatoes requires no pests and diseases, and the size of the potato pieces is 100-250 grams. After selecting the seeds, spraying the new high-fat film 800 times solution after drying, can repel the pests, isolate the virus infection, strengthen the breathing intensity, and increase the seed germination rate. Second, cover film early breeding, cultivate strong seedlings Selection of seedlings is an important stage of purple sweet potato cultivation, and purple potato seedlings can adopt "two-stage breeding method". The first stage is in the middle and late March, and the seedling bed is 1.2 meters wide and 20-30 cm high in the shed. The depth of the bed is 15-20 cm. The bottom of the bed is covered with a layer of organic fertilizer, soil and fertilizer. The dung grass can be used, and the soil is covered with the manure and urine. Generally, potato seedlings are inserted in a horizontal oblique direction. It is necessary to pay attention to distinguishing the head and tail, and not to invert. The new high-fat film is sprayed on the surface of plants to prevent the infection of pathogens, improve the ability to resist natural disasters, increase the intensity of photosynthesis, and protect the growth of seedlings. The density of seeding is preferably about 2-3 cm between potato chips. After the seedlings are well prepared, the soil is covered with soil, so that the flat potato is not flat, the seed potato does not touch the cow dung grass, and the soil is covered until the seed potato is not seen. Then cover the thin straw, pour the whole seedbed with clear manure water, and then shed the shed to warm and moisturize; the second stage is about mid-April, when the seedling height is 5-7 cm, the seedlings are transplanted, and the row spacing is 35 cm. × 70 cm, and covered with a small arch shed, continue to keep warm. During the nursery, pay attention to ventilation and anti-burning seedlings, and topdressing to promote growth. In the process of raising seedlings, it is necessary to cut the plants at the right time. When the sprouts grow to more than 20 cm, the cutting is started, and the roots of the seedlings should be treated with 800 times liquid of the new high-fat film, which can effectively prevent the water from transpiration of the seedlings, isolate the pests and diseases, protect the root tip sheath, shorten the slow seedling period, and quickly Adapt to the new environment. Third, work on the ground, apply enough fertilizer Purple potato is suitable for planting on land with high topography and convenient irrigation and drainage. The soil is best loose and fertile, and sandy soil with higher organic matter is the best. Deeply turned into a squat, the squat is 40-50 cm wide, the squat is 25-30 cm high, and the squat distance is 66-86 cm. In the process of soil preparation, the base fertilizer is applied. Generally, 15-20 tons of cooked chicken manure, 20-25 kg of compound fertilizer, and 15 kg of potassium sulfate are applied per mu, and the chicken manure is applied before the cultivation. The fertilizer is applied in the ditch when it is used, and 3% is applied per mu. The phoxim granules are 2-2.5 kg to prevent underground pests. Fourth, timely insertion, reasonable close planting Breed the seedlings, transplant them in time, and timely water them in case of drought. Generally, it is best to plant in mid-May to early June, usually planted in a single row, with a plant spacing of 30-35 cm. Purple potato is suitable for planting density of 3000-3500 plants per mu. The planting time is best chosen when the soil is not dry or wet in cloudy weather or when the rain is fine and the soil moisture is suitable. When the temperature is high on sunny days, it should be planted in the afternoon. It can not be planted in heavy rain and prevent the formation of firewood stems. V. Strengthen management and control seedlings in a timely manner Purple potato cultivation should be well managed in the field. According to the needs of crops, timely cultivating and weeding, combined with cultivating and cultivating soil, ploughing water, timely lifting, grasping and loosening the root hair, do not disturb the direction when lifting the tampon, still put back the original place, spray the ground after lifting Fruits and strong spirits make the underground nutrient transport conduit thicker, improve the fruit fruit swelling and vitality, the fruit surface is smooth, the fruit shape is strong, and the yield is increased. At the same time, we must pay attention to pest control. Purple potato pests and diseases are less, but can not be paralyzed. Underground pests have tigers and red ants. Spraying targeted drugs and adding new high-fat membranes will greatly increase the effective component rate of pesticides. Field pests mainly include large cockroaches and leaf curlers, which are culled in time with agricultural insurance. The disease of purple potato is mostly caused by the high temperature and rainy season in summer, and it is controlled by Dasheng M-45 and carbendazim at the early stage of the disease. In the prevention and control of pests and diseases, early prevention and control, ban high-toxic, high-residue pesticides, and improve the quality of purple potato products. It is necessary to topdress in time during plant growth. If the base fertilizer is relatively sufficient, the fertilizer can not be topdressed in the early stage of growth. On the contrary, 10 days after the insertion, combined with the first weeding and application of the seedling fertilizer, it can be used to drench the human, animal urine or biogas water one or two times. 40-50 days later combined with cultivating, chasing potato fertilizer. After 60 days of growth, after entering the expansion period of the potato tubers, it is no longer possible to topdress. When the plant grows to a certain extent, it is necessary to pay attention to seedling control and topping. When the vine grows to 80 cm, it is necessary to timely remove the top bud of the main vine, and promote the side vine, so that the nutrient is sent to the potato, and the weed is removed at the same time. Generally, in July-August, combined with weeding, it can be used 1-2 times to prevent undecided potatoes and ensure yield. Note that you only need to mention the vine, you can't turn the vine, and you should stop the vine after mid-August. 6. Harvest at the right time to ensure quality Purple sweet potato harvested too early, will significantly reduce the yield of roots, harvest too late, roots are often affected by low temperature and cold damage, storability is greatly reduced. Therefore, it must be harvested at the right time. Generally, in mid-to-late October, when the average temperature of the day drops to 15 °C, the growth of stems and leaves and the expansion of potato tubers stop, and harvesting can begin, and harvested before the frost is reached at the latest. Choose purple potatoes in sunny and rainless weather to avoid more soil on the potato chips, affecting the appearance of the goods. The above is the key point of high-yield cultivation techniques of purple sweet potato. Farmers who have ideas about the purple potato planting industry must first master the planting points and quickly come to Huinong.com. 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