The use of winter greenhouses to plant winter leeks, the Spring Festival can be listed, the harvest period of up to 4 to 5 months, per acre yield of up to 3,000 kg or more, the output value of more than 6,000 yuan. First, use good varieties to choose good palatability, high yield, strong resistance, cold-resistant color, such as the Hongyeyuan Dahongpao, full-leaf red and so on. Second, the site selection fertilization selection of flat terrain, fertile soil, irrigation and irrigation convenience, weeds less land, in early November deep plowing 15 cm to 20 cm, combined with deep plowing per acre Shi quality decomposed organic fertilizer 3000 kg, 25 kg of diammonium phosphate as a base fertilizer . Then make a flat bed with a width of 1m to 1.2m. Third, timely sowing can be sown in mid-late and late November. Before sowing, we should use enough water for planting. Use 3 kg to 4 kg per acre. Mix the seeds with appropriate amount of fine sand and spread it onto the surface of the noodles. Use foot solids to suppress or cover a layer of dirt and cover the film. Then a small arch shed 70 centimeters to 80 centimeters high is supported by a bamboo strip 2 meters long and covered with a film. Fourth, to strengthen management on the basis of pouring enough water, watering before emergence, 5 days to 7 days to emerge. After the cotyledon was unearthed, the mulching film was removed for the first time weeding the seedlings. When the two true leaves are grown, the second time the weeding and seedlings are returned, and the first time the fertilizer is poured, the first time the water is applied. Generally, 10 kg of nitrogen-phosphorus compound fertilizer is topdressed, and the second fertilizer is applied after 15 days and combined with watering. , Mushi compound fertilizer 5 kilograms, after each harvest 1, top dressing watered once, each fertilization of 5 kg to 10 kg per mu or application of thin human livestock manure fertilizer 1000 kg. At the end of March of the following year, when the temperature rises, small arch shelters can be removed, ventilation can be enhanced, and high-temperature seedlings can be prevented and white rust can be prevented. Five, timely harvest leek grow to 4 to 6 leaves, plant height 10 cm ~ 15 cm can be listed between large seedlings, while replanting leek, so that can be harvested in batches until the first half of June Qingdai. Pay attention to each time the income must be kept between large and small, leaving uniform, in order to increase production. Pcr Thermal Cycler,Hbv Nucleic Acid Detection,Thermal Cycler Pcr Instrument,Pcr Real Time Detecting System Jiangsu Dinai Bioengineering Co.,ltd. , https://www.dinaipcr.com