国内外誉为牧草之王的紫花苜蓿(Medicago Sativa)是一种高产、优质、抗逆性强、适于在温带地区种植的优良豆科牧草。为各种畜禽喜食、采食率高营养价值好。根系满布根瘤能固定空气的氮素因而增肥地力效益好。适于我国北方种植的紫花苜蓿品种有:草原1号、2号;公农1号、2号;晋南苜蓿; Medicago Sativa, known as the king of forage at home and abroad, is a good leguminous plant with high yield, good quality and strong resistance, suitable for planting in temperate regions. For a variety of livestock and poultry, eating high nutritional value. Roots covered with root nodules can fix the nitrogen of the air and thus benefit fertility. Alfalfa varieties suitable for planting in northern China are: Prairie No. 1 and No. 2; Gongnong No. 1 and No. 2; Jinnan alfalfa;