河北省丰宁满族自治县引种的美国豆类新品种──美国地豆，在海拔1600m的高寒坝上试种成功，产量和效益双丰收。丰宁满族自治县地处华北平原向内蒙古高原过度的丘陵地带。坝上高寒区无霜期短，尽夜温差大，传统作物种植以小麦、莜麦为主，豆类作物只少量种植蚕豆等。为改变传统 The new US bean variety introduced from Fengning Manchu Autonomous County in Hebei Province, was successfully planted on alpine dam of 1600m above sea level with double yield and benefits. Fengning Manchu Autonomous County is located in the North China Plain to the Inner Mongolia plateau over the hilly areas. Bashang alpine frost-free period is short, night temperature, large, traditional crop cultivation of wheat, oatmeal-based, legumes only a small amount of planting beans and so on. To change the tradition