冀西北高寒区海拔1450～1600m,气温干燥、冷凉,无霜期约100d。人均水浇地少,旱坡地多,土壤瘠薄。如何提高经济效益,增加农民收入,成为政府和农民共同关注和急切想解决的课题。如生菜、大白菜露地复种是解决人均水浇地少的有效措施之一。生菜、大白菜是目前市场看好的品种,产量高、销量大、前景好。前茬生菜后茬大白 Hebei northwest alpine area 1450 ~ 1600m above sea level, the temperature is dry, cool, frost-free period of about 100d. Per capita irrigated land less, more arid lands, soil infertility. How to improve economic efficiency and increase peasants’ income has become a topic of common concern and eagerness to be solved by the government and peasants. Such as lettuce, cabbage field planting is one of the effective measures to solve per capita irrigated. Lettuce, Chinese cabbage is currently optimistic about the market varieties, high yield, large sales, good prospects. Before the stubble lettuce stubble