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我市冬季和早春气温低、寒潮多,影响冬季蔬菜的生长,严重时受冻缺棵死亡,形成一年供应中最大的淡季——“冬缺”.春青菜3月份生长迅速,产量倍增,大量集中在3月下旬、4月上旬上市,造成过剩烂损,形成“春满”.为解决冬春生产不稳定、上市不均衡的矛盾,1980年冬1981年春我们在市郊选择4个试验点,采用0.02毫米的超薄膜实行小拱棚和地面两种覆盖方式,进行冬季和春季两茬栽培试验,结果表明冬青莱后茬覆盖茼蒿和小青菜可以较好地解决“冬缺”与“春满”的问题.
Winter and early spring in our city low temperature, cold wave more affect the growth of winter vegetables, severe cold death due to the lack of trees, the formation of one year supply of the largest off-season - “winter shortage.” Spring cabbage in March the rapid growth of doubled production, A large number of concentrated in the end of March, early April listing, resulting in excess damage, the formation of “Chun Man.” In order to solve the winter and spring production instability, the market is not balanced the contradiction, the winter of 1981 the spring of 1981, we choose four pilot points in the suburbs , 0.02 mm ultrathin film was used to carry out two kinds of covering ways of small arch and ground to carry out winter and spring crop cultivation experiments. The results showed that the covered branch of Holly Tree and Choyu cabbage could better solve the problem of “winter shortness” and “spring fullness ”The problem.