Open field cultivation: planting in early April, harvesting in early June, and harvesting in July. Summer onion is planted in the middle and late June, and it can be cultivated by shading net or interplanted with tall crops in summer with high temperature. It will be harvested in mid-August, and it will enter the peak harvest period in September, when the quality is good and the price is high.

Planting winter onion 10 after mid-October will avoid the high temperature and rain before the Mid-Autumn Festival, prevent the onion seedlings from growing excessively and reduce the stress resistance. Chives should not be continuously planted for many years, nor should they be mixed with other onions and garlic. Generally, they should be rotated with soybeans, corn and other vegetable crops for 2-3 years.

Extended data

Onion belongs to Allium of Liliaceae, and its alias is chive, onion, fire onion, four-season onion and fine rice onion. The upper part is green onion leaves, and the lower part is white onion. Originated in Siberia, China has a long history of cultivation and is widely distributed, with Shandong, Hebei, Henan and other provinces as important producing areas.

Onion is an important seasoning. The edible parts are onion leaves, onion white and onion whiskers, which can be eaten fresh and fried, and can also be processed into dried onion and crispy onion. Onion has many functions in dietotherapy and treatment, and it is also a health-care medicinal vegetable.

Moreover, chives are cold-tolerant, fertilizer-tolerant, and have wide adaptability to soil, but they are weak in heat and drought resistance. The vegetative growth period is suitable for cool climate conditions, and the optimum temperature for germination is 13~

twenty

0℃, suitable temperature for stem and leaf growth 18~23

The optimum temperature for root growth is 14~ 18℃, and the growth rate is slow when the temperature is above 28℃.

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