Spring potato is sown in late January-early February, harvested in mid-May, and harvested about 1700 kg of tubers, with high economic benefits. The cultivation techniques are as follows: 1. Select a good seed and strictly seed potato treatment. The selection of excellent virus-free potato varieties is the basis for high-yield cultivation. Suitable varieties should be early maturity, high yield, stable yield, comprehensive disease resistance and good quality. Cut the seed potatoes longitudinally, each cut 50-80 grams, make sure that each piece has upper bud eyes, and dip it with carbendazim 1:200 times or use the ash to make the incision, spread it for 1-2 days until the potato block starts to grow. Soft enough. Second, the foot fertilizer deep ploughing ridge. The potato has a short growth period and is cultivated in the mulch. It uses a one-time application of base fertilizer. After the application of high-quality ash dung 3000 kg, it is deep-turned, and then the ridge is broken. The width of the ridge is 85-90 cm wide, the width of the ridge is 60 cm, and the height of the ridge is 10- 15 cm, open the seeding ditch along the ridge surface, apply 30-40 kg of high-concentration compound fertilizer along the planting ditch, and gently rub the soil surface after application to avoid contact with the fertilizer. Third, reasonable close planting. Timely sowing and reasonable density are the key to high yields. In the late January to early February, germination and planting. It is cultivated by double-row ridges, with a row spacing of 40-50 cm, a plant spacing of 25-30 cm, and 5000-5500 plants per mu. Fourth, do a good job of removing the mulch film. Before the film is covered with 72% Duer 100 ml, spray 50-60 kg of water on the ridge surface, the ridge surface should be flat, the sealing film should be strict, and the film should be solid. After the film is covered, the work of clearing the ditch will be done in time. Fifth, strengthen the field management. Timely rupture of the membrane to raise seedlings, found that dead seedlings, lack of seedlings with supplementary seedlings to make up. After the seedlings, the balanced fertilizer was applied, and 5 kg of urea was used to pour water, and 5 kg of urea was chased in the potato phase, and 10 kg of compound fertilizer was added to make the fertilizer. Spring potatoes generally do not need to be snored, but the stems must be removed before flowering to concentrate nutrients for tuber swelling. It is often appropriate to keep the field dry and wet, especially after the potato is formed, the field can not accumulate water, it is necessary to drain the water in time, otherwise it will easily cause the potato block to rot. The main diseases are viral disease, bacterial wilt, black shank disease, and can be used to prevent viral diseases and bacterial wilt by soaking seeds with 1:200 times carbendazim, and to prevent black shank by 200-250 PPM agricultural streptomycin. In the bud stage, the field with a long trend of the plant is sprayed with 15% paclobutrazol 30g and 50kg of water. In the full bloom period, it can be sprayed with Vitalin No. 4 25ml and water 20kg to make the plant dwarf and promote underground. The tuber expands, thereby increasing yield. According to field experiments, after spraying Vitamin No. 4, the plant height could be reduced by 7.2 cm, the ratio of large tubers increased by 12.06%, and the yield increased by 9.02%.

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