甘薯是人民群众喜爱的食物，但由于受多种病毒的为害引起品种退化造成减产，影响种植面积。对此，大连市旅顺园艺试验场于1997年春从山东省弓I进组培脱毒甘薯苗——“徐薯18”进行栽培试验。栽种结果，经田间实测产量为亩产4446公斤，较当地常规品种2652公斤每亩增产67．2％， Sweet potato is the favorite food of the people, but due to the detriment of a variety of viruses caused by species degeneration yield, affecting the acreage. In this regard, Dalian Lushun Horticultural Experimental Field in the spring of 1997 from Shandong Province I into the tissue culture virus-free sweet potato seedlings - “Xushu 18” for cultivation experiments. Planting results, the field measured output of 4446 kilograms per mu, 2652 kilograms more than the conventional varieties of the local area 67.2% increase in yield,