我省每年种植番薯面积达一千多万亩,是粮食及饲料的重要来源,产量的丰欠对人民口粮的提高及畜牧业的发展关系很大.改良品种是提高番薯产量主要途径之一.我所于1973年起与番薯产区的地区农科所、县农科所、农业局、农技站、农场近三十个单位进行番薯新品种选育及鉴定的协作研究,前两年,共同鉴定 The annual sweet potato planting area in our province amounts to more than 10 million mu, which is an important source of grain and feed. The abundant production owes a great deal to the improvement of people’s food rations and the development of animal husbandry. Improved varieties are one of the main ways to increase the yield of sweet potato. In 1973, I cooperated with nearly 30 units of sweet potato producing and breeding in the regional agricultural institutes, county agricultural institutes, agricultural bureau, agricultural station and farm in the sweet potato producing areas. In the past two years, Common identification