目前，露地种蔬菜效益普遍下降，大大挫伤了菜农的种菜积极性，为探索出高效种菜模式，我们在近郊区进行了莴笋—大葱—菜花间套作试验。采用春提前（小拱棚覆盖）、秋延后（菜花地沟覆膜）和大葱提前收获方式补充淡季，使三茬菜收获上市时间均在淡季，因此，价格都较高，经济 At present, the benefits of alfalfa vegetables have generally dropped, which has greatly dampen the enthusiasm of vegetable growers. In order to explore an efficient planting pattern, we conducted a lettuces-green onions-cauliflower intercropping experiment in the suburbs. Spring early (small arch shed coverage), autumn delay (cauliflower trench coating) and green onion early harvest season to add off-season, so that three crop harvest time to market are in the off-season, so the price is higher, the economy