After adopting nylon-covered early-maturing cultivation technology, the spring potato can be used for 10-20 days in the morning market than the conventional open field cultivation, and grab the market sales gap to improve economic benefits. The early-maturing cultivation methods in spring mainly include three methods: mulch thick film, small arch shed double film covering, thick film small arch shed covering and mulching film tiling. The main technical points are as follows: First, select good varieties. Regardless of the coverage method, the original species of “Dongong 303†or “Kixin No. 4†and “Zhongshu No. 2†transferred from the north must be used. It is even more difficult to use native species that have been kept for many years, and whose varieties are aging and species are seriously degraded. The amount of acres used will cost about 150 kg. Large potatoes can be cut and planted, each seed potato weighs 20-25 grams, and bud eyes 2-3. Second, the base fertilizer is applied. In mulching cultivation, fertilizer should generally be applied in one time. Post-film topdressing is not convenient. When ploughing, use 50 kg of sulfur-containing ternary compound fertilizer (15% of nitrogen, phosphorus and potassium), and do not use chlorine-containing fertilizers (such as potassium chloride) to avoid affecting quality. After the whole earth is done, use the decomposed farmyard manure such as pig, sheep, rabbit, chicken, duck manure or human excrement for more than 30. The hole should be deeper and larger. First use human feces and urine, then apply a manure and manure, cover with a layer of soil to avoid direct contact between seed potatoes and fertilizers, affecting emergence, and the remaining fertilizer can be re-constructed after ditching between rows. In this way, the fertilizer can be continuously supplied, and it is no longer necessary to topdress. The seeding density is about 6,000 per mu. Third, timely planting. According to different coverage methods, the seeding period is also different. The thick film shed of the mulch film can be sown in late December, the thick film small arch shed is in early January, and the mulch film is laid in late January. Fourth, chemical weeding. Chemical weeding should be carried out before the cover film is mulched to prevent grass damage. It can be sprayed with 50% acetochlor 75-100 ml of water in the whole field. The application requires moist soil and flat surface to improve the herbicidal effect. 5. Cover the nylon. The nylon film should be carefully covered, surrounded by soil compaction, and sealed before emergence. After the emergence of the seedlings, the mulch film should be broken in time to release the seedlings, and the seedling holes should be sealed with the soil to increase the soil temperature. When the temperature is high on a sunny day, the arch shed should be ventilated to prevent high temperature burning. Sixth, chemical regulation. In the flowering period from the beginning of flowering to the full bloom period, 5 ml of 5 ml of uniconazole is used to flush 8 kg, and the amount of 30 ml per mu is sprayed evenly on the plant to enhance plant resistance, reduce disease, prevent early maturity and increase yield. The effect can generally increase production by 10-15%. Seven, prevention and treatment of insects. The main disease during the growth of potato is late blight. When another star disease strain is found, it should be removed in time, and then sprayed with 25% toxic mycelium 800 times. Insect pests mainly have 28 star worms that can be treated with 80% dichlorvos 800 times spray. Aphids can be sprayed with 2000% of 10% imidacloprid series pesticides. China Extract Powder For Use As Dietary Supplement Extract Powder, Extract Powder Manufacturer Shaanxi Kang New Pharmaceutical co., Ltd. , https://www.bodybuildingoil.com