How to raise seedlings of green onions in autumn?

How to raise seedlings of green onions in autumn? Please introduce the key techniques for cultivating strong seedlings of Welsh onions in autumn: 1. Variety selection. The varieties of green onion in Luannan county mainly choose Liao onion No. 1 and Tang onion, which have good cold resistance, long green onion, lodging resistance, high yield and good quality. two。 Sowing date. Green onions are very strict in sowing date, and they are usually sown at the end of September of the previous year. The seedlings were large before sowing in early winter, and could not be cultivated by early bolting in the second spring of vernalization, but weak before sowing in late winter and easy to die in overwintering period. 3. Choose the nursery land. Choose fertile soil with flat terrain, ventilation to the sun, close to water sources and loose soil. Never raise seedlings with continuous stubble in the same piece of land. Plots with underground pests should be controlled with pesticides. 4. Prepare the soil and fertilize. 1520 kg potassium sulfate compound fertilizer was applied per mu. To make the border, the border is about 1 meter wide and 7 meters long, which is easy to manage. The area ratio of seedbed to planting field is 1: 1, 6: 1, 1: 4. According to the sowing rate, 500g seeds can be planted 1000 square meters, equivalent to 0.35kg per mu. 5. Soaking seeds to accelerate sprouting. Before sowing, the seeds were soaked in cold water for 8 hours. After being removed, the seeds were wrapped with a clean wet cloth and placed at 15 ℃ ~ 20 ℃ to accelerate germination. Rinse with clean water once a day, after about 6 days, the radicle exposed should be sown in time. 6. Sowing method. In order to make the seedlings grow neatly, it is best to use strip sowing, according to the row spacing of 10-15 cm, open a shallow ditch with a depth of 1.5-2 cm, irrigation along the ditch, and sow seeds evenly in the ditch after water infiltration. After the whole border sowing, flatten the border surface. 7. Seedling management. From sowing to unearthing, the ground should always be kept moist to prevent the soil from hardening, and the cotyledons can be irrigated once when the buds are unearthed, so that the cotyledons can straighten, take root and stabilize the seedlings, and then irrigate the cotyledons twice according to the soil moisture, the amount of water should not be too much, so as not to overgrow the seedlings, and pay attention to timely ploughing and weeding. The seedlings should be watered with frozen water once before overwintering, and a layer of dung can also be covered to increase the ground temperature and ensure the seedlings to survive the winter safely. Watering green once after turning green and entering the peak period of seedling growth with the increase of air temperature, combined watering, topdressing and weeding seedlings should be carried out for 3 times. after the second time, moisture should be properly controlled to prevent the lodging of onion seedlings, and squatting seedlings should be properly squatted 10 days before planting. Click to get more green onion planting techniques click to get more vegetable planting techniques