Before sowing, it is necessary to fertilize and plow the land, level the land and break the soil to facilitate direct seeding. To prevent the growth of weeds, before sowing, spray the ground with100 ~150ml of 48% nitrogen mustard butyrate emulsifiable concentrate every 667 m2, mix the soil for 3 ~ 5 cm, and then cover the film. Use wide film seeder (mainly used for wide film mulching sowing of cotton in Xinjiang) to lay film and punch holes. Select a plastic film with a width of 1.4m, and lay it flat with a film spacing of about 20cm. You can also choose a black weeding film. After film mulching 1 week, the suitable sowing date is as early as possible when the ground temperature under the local film reaches 5℃ and 5 cm. When sowing, artificial sowing is adopted according to holes, and holes are punched with wooden handholds according to the specifications of plant spacing 12 cm and row spacing 15 cm, with a depth of 1 ~ 2 cm, and 2 ~ 3 seeds are sown in each hole, then the holes are sealed with soil and pressed firmly with plastic film. When sowing, we should pay attention to shallow planting with broken film to prevent missing sowing. In order to facilitate early emergence and orderly germination, seeds can be soaked in cold water for 12 hours before sowing, and then sown when they are taken out and dried until they are not sticky. When sowing in the field, when there are many seedlings missing, a small number of seedlings should be reserved for replanting. After emergence, the seedlings under the film should be released from the seedling holes in time and sealed with fine soil. Interval and replant in 3 ~ 4 leaves, each hole 1 plant. When thinning seedlings, dig out the roots with narrow and long sharp tools, soak the roots with rooting powder and replant them in the holes. The suitable depth is to bury the fibrous roots to ensure the whole seedling. The number of seedlings per 667m should be 30,000 to 40,000.

At present, onions are planted on a large scale abroad and in Xinjiang, China. In order to improve the efficiency of onion planting and reduce the production cost and labor intensity, they changed the previous mode of artificial onion planting, but used sowing machinery for direct seeding, and completed the operations of film laying, planting and drip irrigation at one time.