The planting technology of green onion includes the following aspects

1. selected
1. Green onions are afraid of waterlogging and drought. Green onions should be planted in plots with good drainage. It can be selected as a parameter whether rainwater can seep and drain within four hours. 2, avoid continuous cropping, continuous cropping production, three years of serious production reduction, almost no yield. 3. Welsh onions require neutral soil, and the allowable ph value range for cultivation is 5.9-7.4.
2. sowing and seedling management
1. Sowing date: Zhangqiu green onion seedlings are divided into autumn seedlings and spring seedlings, with autumn sowing as the main method. The best time for autumn sowing is one week before and after October 5 (follow up immediately after sowing winter wheat). Spring sowing after thawing during the Spring Festival, the sooner the better. In order to prevent low temperature and dryness, mulching can be used. 2, seedling wow finishing, according to 80cm whole wow, spread, cover soil 1-2cm, mu of fertilizer (compound fertilizer or diammonium 30kg). 3, with the amount of seed, per mu 1.25 kg-1.50 kg mixed with fine soil 10 times left and right hand sowing. 4. Water after sowing, and after 2-3 days, the surface of the water is lightly watered to loosen the soil and preserve the moisture. The seedlings will be unearthed after 10 days without any management.
3. seedling management
1, management before winter, after the seedlings, water in case of drought, pour frozen water before freezing, to ensure safe winter. 2, spring management, seedling prevention is too dense, transplanting to solve uneven seedling, that is, between dense fill thin, to stay small. After the Qingming Festival, water two to three times in case of drought, and each time the top dressing is not less than 30kg of three-element compound fertilizer per mu. In early June, stop water control seedlings and prepare for transplanting.
4. colonization and transplanting
1, soil preparation and ditching, fertilization and stubble removal after wheat harvest, the best condition is to apply 2000kg of ring fertilizer per mu, the distance between onion furrows and ridges is about 90cm, and the furrows are 20-30cm deep. It is best to use machinery to ditch and ridges at one time. Shungou applies base fertilizer 15.00 kg-25.00 kg (special compound fertilizer is the best) 2. Seedling selection, elimination of weak seedlings, transplanting about 4 mu of field per mu of seedling field, planting about 3cm apart, and planting 20000 seedlings per mu. 3. Transplanting time: The sooner the wheat is harvested, the better. Generally, it ends in early July to ensure the growth period is not less than 130 days (calculated before freezing). 4. There are two transplanting methods. One is dry planting method, which is arranged along the ditch according to a distance of 3cm. The buried soil is watered after planting. The second is the water planting method, that is, watering first, and then inserting the onion root into the ditch with the onion branch after the water seeps down. This method is best carried out in the new onion area under the guidance of technicians on site to avoid sabotage.
5. field management
During this period of time after planting, the weather is hot and rainy, and the green onion seedlings grow slowly. There is no need to water and fertilize. In case of severe drought, there is no need to water or fertilize. Just use herbicide to kill weeds. After the beginning of autumn, green onions enter a period of vigorous growth. From late August to early October, green onions need the most water and fertilizer. They insist on water for about 10 days, and the land is wet but not dry. This is the key technology for high yield of over 10,000 catties. During this period, topdressing will be conducted twice in mid-August and late September, each time not less than 100kg (special compound fertilizer is the best). Combined with topdressing and soil cultivation twice, the height is not to bury the heart leaf as the standard.