卢龙县孟时各庄乡马时各庄村李秀样通过提纯复壮措施，使原来的一窝红品种亩产达到4000公斤左右，比未经提纯复壮的当地一窝红增产20％左右。近年来，在群众自发推广栽培下，至1995年栽培面积达20000多亩。据调查：经过提纯复壮的一窝红甘薯主要优点是：一、淀粉李、出平率高前 Lulong County Meng Shizhuang Township, Ma Zhuang Village, when the show like Li Xiu sample purification and rejuvenation measures so that the original a litter of red species per mu reached about 4,000 kg, compared with the local litter without purification and rejuvenation 20% increase. In recent years, under the initiative of the masses to promote cultivation, up to 1995 cultivation area of ​​20,000 mu. According to the survey: After the recovery of a nest of red sweet potato main advantages are: First, the starch Lee, a flat rate high