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大白菜有明显的杂种优势。利用优良一代杂种不仅能提高单位面积产量，还能增强抗病性。目前国内外普遍采用杂一代种子进行大白菜生产。一、对栽培环境的要求１、温度：大白菜是种子春化型作物，从萌动的种子到结球的成株只要感应一定日数的低温都可完成春化过程，即使在１０～?
Chinese cabbage has obvious heterosis. Using superior generations of hybrids not only increases yield per unit area but also enhances disease resistance. At home and abroad commonly used hybrid generation of Chinese cabbage production. First, the requirements of the cultivation environment 1, Temperature: Chinese cabbage is a seed vernalized crop, from the germinating seeds to the ball of the adult as long as induction of cold weather for a certain number of days can be completed vernalization process, even in 10 ~?