甘薯是我省重要的粮食作物,常年种植面积260万亩左右,单产约1900kg。近年来,甘薯病毒病普遍发生,产量下降,品质变劣,一般减产20％以上,全省每年损失约3亿元。甘薯经茎尖分生组织培养脱除病毒后,可大幅度地提高产量和改善品质,经5省3年93点次试验、示范,推广“徐薯18”等品种的脱毒薯,一般增产20～40％,高的可达成倍以上。为加快 Sweet potato is an important grain crop in our province. The perennial planting area is about 2.6 million mu and the yield is about 1900kg. In recent years, sweet potato virus disease has occurred in general, yield decline, deterioration of quality, generally cut more than 20%, the province lost about 300 million yuan each year. Sweet potato by the shoot tip meristem culture to remove the virus, can greatly improve the yield and improve the quality of 93 provinces and 3 provinces after 3 years of testing, demonstration, promotion of “Xushu 18” and other varieties of drug-free potato, the general increase 20 ~ 40%, high to reach more than doubled. To speed up