菜苜蓿又名金花菜 ,黄花苜蓿、南苜蓿、草头 ,属一年生或二年生豆科草本植物。长江流域一带栽培较多 ,多为绿肥作物 ,前期采食嫩苗 ,后期当作绿肥还田 ,改良土壤。上海地区菜苜蓿过去都以露地栽培为主 ,在寒冷的冬天 ,市场上一般很少供应 ,为使市民在 12月至 2月均能吃到鲜嫩的 Vegetable alfalfa, also known as honeysuckle, alfalfa, southern alfalfa, grass head, is an annual or biennial leguminous herbs. More cultivated in the Yangtze River area, mostly green manure crops, early consumption of young shoots, later as green manure, soil improvement. In the past, alfalfa cultivated in Shanghai mainly used open-field cultivation. In the cold winter, the market is generally scarcely supplied. In order to enable citizens to eat freshly in December and February