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河北省昌黎县在发展塑料暖棚韭菜规模化生产中,创造了分期扣棚、一膜三次用技术,从而提高了棚膜利用率,使暖棚韭菜亩成本平均降低了1600元。县科技示范村康艾庄村,1996年暖棚韭菜达到700多亩,纯收入达130余万元。 暖棚韭菜一膜三用主要栽培措施是: 一、搭配适宜品种 从冀东及京,津地区的自然、气候条件看,适宜一膜三用栽培的韭菜品种主要有791、寒青、汉中等。寒青耐低温,生长力强,0℃时才停止生长,几乎没有休眠期,不经低温锻炼仍能连续生长,很适宜作为一膜三用中的晚秋和初冬保护栽培品种。而汉中冬韭则必须在—5～—7℃的低温下,经过7～10天的锻炼,渡过春化阶段
Changli County, Hebei Province, in the development of large-scale production of plastic greenhouses leeks, creating a staging Xiepeng, a film three times with the technology to improve the utilization of greenhouse film, so that the average cost of greenhouse leek Mu 1,600 yuan lower. County Science and Technology Village Kang Yi Zhuang village, greenhouse leeks in 1996 reached 700 mu, net income of 130 million. Greenhouse leeks a film three main cultivation measures are: First, with the appropriate varieties from Jidong and Beijing, Tianjin area of natural and climatic conditions, suitable for a film of three cultivated leek varieties are mainly 791, Hanqing, Hanzhong . Cold hardy low temperature, strong growth, 0 ℃ when it stopped growing, almost no dormant period, can continue to grow without cold exercise, it is suitable as a membrane in the late autumn and early winter to protect cultivars. Hanzhong winter leek must be at -5 ~ -7 ℃ low temperature, after 7 to 10 days of exercise, through the vernalization stage