春大白菜栽培在宁夏地区面积不断扩大 ,为了提早上市 ,防止未熟抽薹 ,通常采用育苗移栽。但育苗较为费工 ,管理麻烦且定植后缓苗期长。为了探索较为简便 ,且早熟、高产的栽培技术。我们于 1 997～ 2 0 0 0年采用膜下直播技术获得成功。于 4月 1 5～ 1 7日播种。 6月 2 0日左右 Spring cabbage cultivation in Ningxia area continues to expand, in order to early market, to prevent immature bolting, usually transplanting seedlings. However, seedlings are more labor-intensive, cumbersome management and slow seedling after colonization period. In order to explore the more convenient, and precocious, high-yielding cultivation techniques. We succeeded in using live film technology from 1997 to 2000. Sown on April 15 ~ 17. June 20 or so