两年来，脱毒红薯以其特有的发棵早、长势旺、分枝多、叶面积大、光合率高、结果多、薯块膨大快、增产效果显著等优点正逐渐被广大农民及科技工作者所接受。１９９７年４月份，伊川县农牧局在上级业务部门的指导下，从山东农科院引进脱毒薯苗４３１株，经过一个周期的精心... In the past two years, the virus-free sweet potato is gradually being used by farmers and science and technology for its unique advantages such as early onset, vigorous growth, many branches, large leaf area, high photosynthetic rate, many fruits, quick enlargement of potato tuber and remarkable yield increase effect Accepted. April 1997, Yichuan County Bureau of Agriculture and Animal Husbandry under the guidance of the higher business unit, introduced from the Shandong Academy of Agricultural Sciences virus-free potato seedlings 431, after a period of meticulous ...