Cultivation techniques for the anniversary of scallions

1、 Variety selection: For annual cultivation of scallions, it is necessary to choose varieties that are cold, drought resistant, heat-resistant, adaptable, white and non tillering, such as Chinese giant scallions and Zhangqiu scallions.2、 The stubble arrangement (1) is from January to March, and it is sown on a flat bed in the greenhouse. It is harvested and listed in March to May. （2） In mid to late March, the small arched shed will be sown on a flat plot. The harvest will be released in June, or transplanted in early to mid June. The harvest will be released in October to November or stored in winter. （3） In early April, seedlings are sown and raised in the open field, transplanted in mid to late June, planted in wide and dense beds, overwintering in the open field, and flower buds are removed from March to April of the following year, and harvested and listed in April to May. （4） Sow and raise seedlings from July to August, transplant in early September to November, plant closely (with a spacing of 3 centimeters), overwinter in the open air, remove flower buds from March to April of the following year, and harvest and market in May to July. （5） Sow and raise seedlings in mid to late September, overwinter in the open field, and harvest and market in March to April of the following year. （6） Sow and raise seedlings in mid to late September, transplant in mid April of the following year, harvest and market in July to August, or transplant in June of the following year, harvest and market in October to November, or store in winter. （7） Planting indoors in late August to early September, closing the shed in mid October, and harvesting and listing from December to February of the following year.3、 Management Technology (1) Winter and Spring Nursery Bed Management. Before overwintering, scallion seedlings should have 2-3 leaves. According to temperature and soil moisture, they should be watered with overwintering water once before freezing, and then covered with a layer of fully decomposed farmhouse fertilizer to maintain moisture and insulation, ensuring the safe overwintering of the seedlings. In spring, as the temperature increases, the seedlings enter a rapid growth period. One to two times of thinning should be carried out to keep the distance between the seedlings at about 3 centimeters. Secondly, it is necessary to combine watering and apply quick acting nitrogen fertilizer or nitrogen phosphorus potassium compound fertilizer 2-3 times, each time 10-15 kilograms per acre, to promote rapid growth of seedlings, harvest small green onions for market or cultivate healthy seedlings for transplantation. （2） Summer seedbed management. When raising seedlings in summer, during the hot and rainy season, the key to management is to do a good job in three prevention measures: one is to prevent diseases and pests. Second, prevent weeds. After sowing and before emergence, seal the soil with 33% weed killer 100ml spray per mu, and pull weeds 2-3 times manually to completely eliminate weeds. Three measures to prevent water stains: the seedbed should be able to be irrigated during drought and drained during waterlogging, and no water should accumulate inside the seedbed. （3） Transplantation. Before transplanting, sufficient base fertilizer should be applied, with 6000 kilograms of fully decomposed high-quality farmhouse fertilizer, 30 kilograms of phosphorus fertilizer, and 50 kilograms of nitrogen phosphorus potassium compound fertilizer applied per acre. one-third of the total base fertilizer should be spread, and two-thirds should be concentrated in furrows. When transplanting, the seedlings should be graded, and large and small seedlings cannot be mixed. If scallions are listed, they can be densely planted with a row spacing of 60-70 centimeters and a plant spacing of 3-4 centimeters; If scallions are listed, the row spacing is 80 centimeters and the plant spacing is 5 centimeters. After transplanting, it is necessary to timely cultivate and loosen the soil, flatten the ridges, break the hardening, and promote the growth of the root system of scallions. Combined with watering and topdressing with nitrogen, phosphorus, and potassium compound fertilizers, topdressing with 30 kilograms per acre. Timely cultivate soil according to the growth status of scallion seedlings to promote the formation of scallion white.4、 The soil treatment technology for continuous cropping is not suitable for planting scallions in continuous cropping, otherwise it will seriously affect yield. If continuous cropping is used, the soil must be treated. （1） Increase the application of fully decomposed farm manure and phosphorus potassium fertilizer to supplement the trace elements required for the growth of scallions, such as sulfur, zinc, calcium, magnesium, and iron, promoting the healthy growth of scallions and improving their disease resistance. （2） Use Lvheng 1 to sterilize the soil.