“392”是舟山地区农科所用“贵州白皮”与“超胜5号”有性杂交选育而成的。1977年引入丽水地区试种,表现抗病高产稳收,深受山区农民欢迎,种植面积逐年扩大。青田县农科所1978年品比试验亩产鲜薯7240斤,比“港头白”增产65%;1979年试验亩产鲜薯7350斤,比“红红1号”增产47%; “392 ” is used in Zhoushan area “Guizhou white skin ” and “Chaosheng 5 ” sexual cross breeding. Introduced to Lishui in 1977 for trial planting, showing high yield and stable disease-resistant, welcomed by peasants in mountainous areas, planting area expanded year by year. In 1978, Qingtian County Agricultural Science Bureau experimented with 7240 kilograms of fresh potato per mu, an increase of 65% compared with that of “Hong Kong Whitehead”. In 1979, the trial produced 7350 kilograms of fresh potato per mu, which was 47% more than that of “红红 1 号” %;