How to manage growing green onions?

How to grow green onions? What are the key points in the management of green onions? Netizens who plant green onions are also asked to introduce that the traditional cultivation methods of green onions are mostly planted in summer, autumn harvest and winter storage. In order to realize the annual balanced supply of green onions, scientists and technicians cultivate varieties with strong adaptability, improve cultivation and management techniques and apply some simple facilities (small arch greenhouse, greenhouse, simple solar greenhouse), etc., so that green onions can be cultivated all the year round and obtain better benefits. Therefore, the farming network has sorted out the cultivation methods and management points of green onions, which are listed in detail below for netizens' reference. First, the selection of green onion varieties: the four seasons cultivation should choose cold-tolerant, drought-tolerant, heat-resistant, adaptable, white green onions and non-tillering varieties, such as Chinese onion, Zhangqiu scallions (high foot white) or local farm variety whiplash onions. The variety of shallots is not suitable for cultivation in the four seasons. Second, the cultivation method of green onions: ① from January to March, sowing in a simple solar greenhouse, sowing in flat beds, and small green onions on the market from March to May. In the middle and last ten days of ②, the seeds were sown in the small arch shed and sowed in the flat bed, and the small green onions appeared on the market in June. It can also be transplanted in the first and middle of June and harvested from October to November or stored in winter. ③ sowed and raised seedlings in the open field in the first ten days of April, planted in a wide border in the middle and last ten days of June, overwintered in the open field, removed the flower buds in March to April of the following year, and put onions on the market from April to May. ④ sowed and raised seedlings from July to August, transplanted from September to early November, closely planted (plant distance 3cm), overwintered in the open field, removed flower buds from March to April of the following year, and green onions appeared on the market from May to July. ⑤ sowed and raised seedlings in the middle and last ten days of September, the seedling bed overwintered in the open field, and the green onions appeared on the market from March to April the following year. ⑥ sowed and raised seedlings in mid-late September, transplanted in mid-April of the following year, harvested green onions from July to August, or transplanted in June, and harvested and stored in winter from October to November. ⑦ sowed seeds in the solar greenhouse from late August to early September, fastened it in the middle of October, and appeared on the market from December to February of the following year. 3. The main points of management of spring onions: 1. Seedling bed management in winter and spring seedlings should have 2-3 leaves before overwintering. According to air temperature and soil moisture, overwintering water should be poured once before freezing, and then covered with a layer of mature farm fertilizer to preserve moisture and heat preservation to ensure that seedlings survive the winter safely. When the temperature rises in spring, the seedlings enter a period of rapid growth, one is to carry out one or two times of seedlings, and the distance between seedlings is about 3cm. The second is to apply quick-acting nitrogen fertilizer or ternary compound fertilizer with irrigated water for 2 or 3 times, each 10~15kg/667 square meter, to promote the rapid growth of seedlings, or to put onions on the market or cultivate strong seedlings for transplanting. 2. Seedling bed management in summer seedling raising is in high temperature and rainy season in summer, the key of management is to do a good job in three prevention, one against diseases and insect pests, two against grass pests, and to prevent grass from eating seedlings. Before emergence after sowing, 33% herbicide 100ml spray was used to seal the soil every 667m2, and combined with manual weeding for 2 or 3 times, weeds were completely eliminated. Three anti-water stains, the seedling bed to achieve drought can be irrigated, waterlogging can discharge, must not seedling bed stagnant water. 3. Green onion transplanting management should apply sufficient base fertilizer before transplanting, and apply mature high quality farm manure 6000kg, phosphate fertilizer 30kg, ternary compound fertilizer 50kg every 667m2. 1max 3 of the total base fertilizer is generally removed, 2pm 3 concentrated furrow application. When transplanting, the seedlings should be graded, and large and small seedlings should not be mixed. Green onions can be properly densely planted on the market, row spacing 60~70cm, plant spacing 3~4cm, make onions on the market, then row spacing 80cm, plant spacing 5cm. After transplanting, the soil should be ploughed in time, the ridges should be flattened, the hardening should be broken to promote the root growth, and the available nitrogen, phosphorus and potassium compound fertilizer should be applied with 667 square meters for 30 kg, and the soil should be cultivated in time according to the seedling growth to promote the formation of onion whitening. 4. Pest control of scallions: 1. Underground pests of scallions: mainly grubs, mole crickets, onion maggots, combined with base fertilizer before ploughing, 667 square meters with 3% phoxim granule 3kg, concentrated in the planting ditch when transplanting. The peak damage period of onion maggots is generally from mid-April to early June and from early September to early November, and the larval stage can be irrigated with 1000 times of phoxim EC, the effect is very good. 2. Aboveground pests of green onions: there are mainly cabbage worm, onion thrips, leaf miner and red spider. To control Pieris rapae, 10% cypermethrin EC 20ml 2.5% enemy kill EC 15ml 25ml 10~30ml, spray on water. The control of onion thrips and leaf miners can be sprayed with 1000 times of dimethoate EC or 1000 times of phoxim, 4000 times of killing and 1500 times of quick killing. 1000-fold solution spray was used to control red spiders. Stop taking the medicine 10 days before the harvest goes on the market. 3. The diseases of Welsh onion: the diseases of Welsh onion mainly include rust, purple spot, downy mildew, gray mildew, black spot and so on. The main control measures are to increase the application of farm fertilizer and phosphorus and potassium fertilizer to ensure the healthy growth of the plant. Ploughing and loosening the soil frequently, dispersing soil moisture and reducing humidity, timely drainage after rain to adjust the microclimate of the field. Small water is watered frequently to prevent flooding. Control methods: rust disease with 2000 times of carbendazim, purple spot with 50% carbendazim, downy mildew with 25% metalaxyl or chlorothalonil, Botrytis cinerea with 1000 times or 50% propofol with 1000 times, black spot with 50% carbendazim or 1000 times of methyl thiophanate. Spray every 5-7 days for 2-3 consecutive times. Fifth, soil treatment methods of continuous cropping land: it is not suitable to plant green onions, otherwise the yield will be seriously affected. If continuous cropping, the soil must be treated. ① increased the application of rotten farm manure and phosphorus and potassium fertilizer to supplement the trace elements needed for the growth of green onions, such as sulfur, zinc, calcium, magnesium and iron, so as to promote the healthy growth of green onions and improve their disease resistance. ② sterilized the soil with fungicides and applied phoxim pesticide to kill underground pests before transplanting. How to fertilize green onions for high yield Zhangqiu green onions planting video