First, the species profile. Zheng Yin No. 5 virus-free potato is an early-maturing, high-yield variety introduced by the China Academy of Agricultural Sciences Beijing Zhongnong Fortune Green Technology Co., Ltd. The variety can be harvested 55-60 days after emergence. Plants stems and leaves green branches 1-2, plant type upright, medium growth potential, plant height 60 cm, white flowers slightly purple, not easy natural solid. Zheng Yin No. 5 virus-free potato tuber number 3-4, concentrative potato, potato size neat, commodity potato is extremely high. This type of yellow-yellow-yellow meat has extremely shallow buds and oval-shaped ovals and is one of the preferred varieties for export. Zheng Yin No. 5 virus-free potato starch content of 12-13%, reducing sugar 0.09-0.15%, crude protein content of 2.47%, vitamin content of 12.54 mg / 100 g. It is suitable for cultivation in the second season rice cultivation area in Central Plains. The cultivation in the past 3 years in Taihe County has proved that about 2,500 kilograms are produced in 667 square meters in spring and 1500-1600 kilograms in autumn. Second, germination technology. In early spring cultivation, the germination time is early February and early February, and it catches the warm and sunny weather. Method: Use 125 kg per 667 square meters, cut the potato block longitudinally with a sharp kitchen knife, eliminate the diseased potato, and promptly disinfect the kitchen knife with 1% lime water. Each piece of healthy potato block is cut into pieces along the longitudinal axis of the potato block by about 25 grams in size. After washing with water in time, it is piled on the ground and dried to adhere to moisture. The layers are spread out in the excavated earthen pond. The pool should be leeward and sunny, with a depth of 60 cm. The length and width should be flexibly controlled according to the amount of film and seed potatoes. The bottom of the pool is covered with 30 cm thick brewing material (such as wheat straw plus 1% urea water, and water wets through the wheat straw), and the tubers can be placed in the pool with a thickness of 6 layers. Finally, the film is covered with moisturizing. Third, site preparation. Apply 3,000 kg of organic fertilizer, 50 kg of ammonium bicarbonate, 50 kg of superphosphate, and 20 kg of potassium sulfate per 667 square meters. The organic fertilizer should be applied before the farmland. The soil preparation should be carried out before the winter and the depth of the cultivation should be more than 60 cm. At the same time as the seed potato germination, the land is to be smashed. The rake is 80 centimeters wide and 15 centimeters high. The sorghum should be flat. When making mash, ammonium bicarbonate, calcium superphosphate, and potassium sulphate are used as the core dressing fertilizer. Fourth, seed cover film. In the germination process of seed potato, it is often observed that when the humidity is small, water should be sprayed. When the seed potato germinated about 1 cm (in the middle or late February), the seed potato was detected and placed in a scattered light place to make the bud green and strong. On the surface of the planter, 40 cm and 30 cm are used for gravel spacing. The planting density is 4000-4500 plants per 667 square meters. The depth of the pit is about 15 centimeters. The tip of the seed potato bud is put down into the pit, and the soil is spread and spread. membrane. When the sensation is bad, you should plunge into the hole. Fifth, emergence management. In late March, potatoes will emerge in succession. At this time, it is necessary to break the film in time to expose the potato seedlings out of the membrane, and immediately use the soil to seal the membrane breakage with fine soil to prevent the cold wind from blowing into the membrane and affect the soil temperature. Drought should be immediately watered, fighting for neat and consistent. Sixth, regiment management. The group season is the beginning of the potato period. At this time, sufficient water supply should be ensured. Water can be poured along the ditch once, and 30 kg of ammonium bicarbonate can be topdressed with 667 square meters of water. Seven, flowering management. The flowering period is the fastest period of potato block expansion, and is also the most serious period of occurrence of pests and diseases. The soil moisture should not be less than 60% at this time. At the same time, it is necessary to control locusts, cockroaches, wireworms, ring rot, and blight. Dimethoate or imidacloprid can be sprayed to control aphids. With 40% zincphosulfur EC 600 times Irrigation to control the earthworm, goldworm. Chlorothalonil and Kelu Spray are used to prevent ring rot and blight. Manual removal of flower buds, because bud respiration can consume large amounts of nutrients. VIII. Harvesting period management. When some leaves turn yellow, they enter the harvesting period. Watering stopped 1 week before harvesting. Be careful when harvesting to prevent damage.