The film mulching and belting rotation is the main cultivation technique of virus-free potato used in the past three years along Yanhe County. The average area of ​​potato planted in the county reached 7467hm2 in 3 years, accounting for 28.6% of the total area of ​​spring-sown crops in the county. With an annual output of more than 180,000 tons of fresh potatoes. Through the 2004-2006 three-year measurement and acceptance, potato film mulching and corn zoning rotation, potato yield is up to 3024kg per hectare, the lowest is 1688kg/hm2, the average yield is 2437kg/hm2 (fresh weight); the highest yield of corn is 7737kg/ Hm2, the minimum output is 5859kg/hm2, and the average yield is 6881kg/hm2. The yield of single-planted potatoes was 13% higher than that of the same conditions in the same area, and the yield of single-planted corn was 5.8% higher. Practice has shown that this technology is an important technical measure to improve potato yield and quality. 1 Advantages of potato mulching covered with belt rotation (1) Make full use of land resources, increase the multiple cropping index, and ventilate and transmit light. Reflecting the marginal effect. (2) Effectively inhibit the weeds, reduce the pests and diseases, and keep the water and fertilizer, so that the soil is loose and not squashed. (3) It is beneficial to the activities of soil microorganisms and promotes the conversion of soil effective nutrients. (4) Increasing the ground temperature by 3-4 °C, enhancing the rapid germination of the potato and shortening the emergence time. According to the test, under the same conditions as other conditions, the method emerged 8-10 days earlier than the no-film mulching cultivation. (5) Covering the mulch can promote the proliferation of potato underground stems and promote the rapid expansion of tubers in the middle and late stages. 2 Potato mulching film zoning rotation cultivation method 2.1 Land selection and deep cultivation of potato are cool crops. Generally, soils with an altitude of over 600m and fertility are selected. The yield increase is more significant. It is not suitable for continuous cropping in the same plot or with Solanaceae crops (tobacco, tomato, eggplant, pepper). ) Rotation. Deeply plowing the soil 30-33cm to improve the physical properties of the soil, make the soil loose, good permeability; improve soil water storage, fertilizer and drought resistance. 2.2 Sowing date and seed treatment 2.2.1 Sowing date. The area below 900m above sea level will be planted in late December or early January, and the area above 900m will be suitable for planting in early February of the following year. Seeding too late affects yield. 2.2.2 Seed selection and processing. Choose the high-anti-detoxification varieties such as Eshu No. 3, Deshu No. 5, Weiwei No. 3 and Kexin No. 1 with good commercial and taste characteristics. 2.2.3 Seed potato soaking. The use of whole potato sowing is conducive to preventing rotten seedlings and lacking seedlings, reaching Miaoqi, Miaoquan, and Miaozhuang; soaking the seed potatoes with water for 192 hours (1/2000) for 30 minutes, then picking up the dry and germination. In order to save the seed, the whole potato is cut into two or more bud eyes, and the seed is immersed in a 1% quicklime aqueous solution or the viscous ash is used for disinfection treatment. After soaking the seeds, the surface is wet and then germinated. 2.2.4 germination. Stacking is covered with straw, sacks and other coverings. Do a good job of ventilation and ventilation, stacking 3-5 layers is appropriate. Germination 3-5d for sowing. 2.3 Sowing the fine soil in the ground, ditch the compartment, and then level the car. It is required to have a width of 1.7m, 2 rows of corn and 2 rows of potatoes in one compartment, a row spacing of O.4m (2 rows of groove center), and a row spacing of 1.3m (reserved rows). The potato planting specification is O.4m×(O.27-0.3)m. When seeding, cut the seed potato down, and the seed potato should not be in direct contact with the fertilizer to prevent burning. 2.4 Balanced fertilization and heavy application of base fertilizer, using 15,000-22,000 kg of decomposed farmyard manure, 375-750 kg of compound fertilizer, 150 kg of potassium sulfate, 750-1225 kg of plant ash per hectare, and mixing nitrogen, phosphorus and potassium in 2:1:3 ratio Use as a base fertilizer in even soil. Seedling and topdressing, using 7500-15000kg of decomposed human excrement per hectare, or applying 150kg of urea to the water to apply strong seedlings. In the bud period, 15 kg of urea and 150 kg of potassium sulphate per hectare are applied to the water. During the tuber expansion period, the leaves were sprayed with 900 kg of O.2%-O.3% potassium dihydrogen phosphate solution, sprayed once every 7-10 days, and sprayed 2-3 times to prevent premature senescence and promote tuber enlargement. 2.5 film, membrane 2.5.1 filming. Use 80cm wide mulch film, while laying the film, while pressing the film, move it to avoid breaking the film. When laying the film, choose a sunny day and a windy weather to spread the film. 2.5.2 Broken film. When the young stems of the potato are unearthed, the membrane is broken in time, and the mulch is cut into a cross shape by about 2 cm on the mulch directly above the young stem, and the membrane is sealed with finely divided soil. The membrane is too late, and the bud tip will rot when the young stem is unearthed. 2.6 Field management After the filming, the film quality inspection is carried out to check whether the film is broken by the wind or human or animal damage. Timely topdressing, chasing 1 seedling fertilizer in the early stage, chasing the tuber swelling fertilizer in the medium term. Water management, in the potato growth period, the field can not accumulate water, to keep the soil moist. When there is a lot of rain, drain the ditch in time; in case of drought, watering once in the evening, the number of times should not be too much. Weeding removes weeds and combines topdressing to cultivate soil. 3 pest control In the sapling stage and flowering period, the seedlings were applied, and 3 hectares of carbendazim or 5.052 kg of mancozeb were sprayed per 750 kg of water to control potato late blight and ring rot. It is used to control the pests such as potato aphids, tuber moths and 28-star ladybugs by spraying 2,500 times of liquid, 1500 times of scorpion emulsifiable concentrate, 700 times of trichlorfon or 1000 times of ergo emulsifiable concentrate. In the sowing, the bromide is mixed with fertilizer to control the rodent. 4 timely harvest The local stems stop growing, the stems and leaves turn from green to yellow, and the lower leaves are dry. When the tubers are easy to separate from the stolons, it is the optimum harvest period, and should be harvested in time. Curcumin is a yellow pigment extracted from the rhizomes of turmeric and other plants of the ginger family. It is an acidic polyphenolic substance with unsaturated aliphatic and aromatic groups in the main chain. It is commonly used as a meat coloring agent and acid-base indicator, and also has pharmacological effects such as anti-inflammatory and antioxidant. Curcumin powder,Curcumin 95%,Turmeric root Extract. 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Virus-free potato mulching film zoning rotation cultivation technique