济南市自六十年代初开始进行春甘蓝早熟栽培及防止抽薹的试验研究工作,1965年以后把试验取得的经验应用于大面积生产,春甘蓝面积逐年扩大,现在仅本市郊区每年种植2000余亩,平均亩产5000斤左右,4月底即可上市,5月中旬大量供应市场,比以往提前一个多月,对调剂蔬菜供应起到重要作用. Since the beginning of 1960s, Jinan City has carried out experimental research on precocious cultivation of spring cabbage and prevention of bolting. After 1965, the experience gained from the experiment was applied to large-scale production. The area of ​​spring cabbage has been expanding year by year. At present, only over 2,000 Mu, average yield of about 5000 kg, the end of April to market, mid-May a large supply of the market, more than a month earlier than the previous, the transfer of vegetables played an important role.