于华北高寒干旱地区引种 16种国内外紫花苜蓿品种 ,不同品种在生长速度、抗旱性、产量、越冬率等方面表现出不同特点。 5种苜蓿越冬率达 90 %以上 ,3种苜蓿越冬率在 70 %～ 80 %之间。 Sixteen kinds of alfalfa varieties were introduced in cold and arid regions of North China. Different varieties showed different characteristics in growth rate, drought resistance, yield and overwintering rates. The overwintering rates of five kinds of alfalfa were more than 90%, and the overwintering rates of three kinds of alfalfa were between 70% and 80%.