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江苏省淮安地处长江中下游地区,冬季气温低,最低温度-12℃左右,而韭菜适宜生长温度12~24℃,温度低于3℃时,生长较为缓慢,低于0℃时易受冻害,解冻后叶尖变白,叶色呈紫色,如长时间-5~0℃,则叶片逐渐干枯变黄。淮安市蔬菜科学研究所采用大棚套小拱棚,小拱棚上覆盖保温被进行冬季韭菜栽培,延长韭菜供应期,使韭菜达到周年供应,取得了较好的经济效益和社会效益。
Huai’an, Jiangsu Province is located in the middle and lower reaches of the Yangtze River, the winter temperature is low, the lowest temperature of about -12 ℃, while leek suitable growth temperature of 12 ~ 24 ℃, the temperature is below 3 ℃, the growth is more slow, below 0 ℃ susceptible to frost damage , After thawing tip white, leaf color purple, such as a long time -5 ~ 0 ℃, the leaves gradually dry yellow. Huai’an City, Institute of Vegetable Science shed a small shed with a small shed, shed insulation on a small shed was cultivated in winter leek, leek to extend the supply of leek to the annual supply, and achieved good economic and social benefits.