徐(xu)薯(shu)(shu)(shu)(shu)(shu)(shu)55-2為父本、紅東為母本，新近育成(cheng)了優質食用(yong)及淀(dian)粉(fen)(fen)加工兼用(yong)型甘薯(shu)(shu)(shu)(shu)(shu)(shu)新品種(zhong)--徐(xu)薯(shu)(shu)(shu)(shu)(shu)(shu)食5。該(gai)品種(zhong)地上部半直立，頂葉紫(zi)色(se)，葉片(pian)深綠(lv)(lv)，葉片(pian)大，缺刻淺，全緣無毛。葉主脈(mo)紫(zi)，側脈(mo)淡紫(zi)，葉柄(bing)(bing)綠(lv)(lv)色(se)，柄(bing)(bing)基淡紫(zi)，節(jie)間短。莖(jing)蔓綠(lv)(lv)色(se)，粗且(qie)短。生(sheng)長勢中(zhong)等(deng)，分枝多，通風透光(guang)好，耐密植。結(jie)(jie)薯(shu)(shu)(shu)(shu)(shu)(shu)早，整(zheng)齊而集中(zhong)，單株結(jie)(jie)薯(shu)(shu)(shu)(shu)(shu)(shu)數(shu)3～5個，大、中(zhong)薯(shu)(shu)(shu)(shu)(shu)(shu)率(lv)高。薯(shu)(shu)(shu)(shu)(shu)(shu)塊紡(fang)錘(chui)形(xing)，薯(shu)(shu)(shu)(shu)(shu)(shu)皮(pi)紅色(se)，薯(shu)(shu)(shu)(shu)(shu)(shu)肉(rou)黃色(se)。薯(shu)(shu)(shu)(shu)(shu)(shu)形(xing)美(mei)觀，熟食味(wei)佳，香、面且(qie)糯。一般春(chun)(chun)薯(shu)(shu)(shu)(shu)(shu)(shu)畝(mu)產(chan)(chan)6000～6500斤，烘(hong)干率(lv)32%，出(chu)粉(fen)(fen)率(lv)19%；夏薯(shu)(shu)(shu)(shu)(shu)(shu)畝(mu)產(chan)(chan)5000～5500斤，烘(hong)干率(lv)28%，出(chu)粉(fen)(fen)率(lv)17%。薯(shu)(shu)(shu)(shu)(shu)(shu)塊萌(meng)芽(ya)性好，苗(miao)多、苗(miao)勻(yun)、苗(miao)壯，與(yu)甘薯(shu)(shu)(shu)(shu)(shu)(shu)新品種(zhong)徐(xu)薯(shu)(shu)(shu)(shu)(shu)(shu)22和徐(xu)薯(shu)(shu)(shu)(shu)(shu)(shu)27相當。該(gai)品種(zhong)耐寒、耐澇，高抗甘薯(shu)(shu)(shu)(shu)(shu)(shu)根腐病，中(zhong)感甘薯(shu)(shu)(shu)(shu)(shu)(shu)莖(jing)線蟲病，不抗甘薯(shu)(shu)(shu)(shu)(shu)(shu)黑斑病，適于我(wo)國黃淮薯(shu)(shu)(shu)(shu)(shu)(shu)區和北方薯(shu)(shu)(shu)(shu)(shu)(shu)區作春(chun)(chun)、夏薯(shu)(shu)(shu)(shu)(shu)(shu)栽培。

“食5紅(hong)薯(shu)”是國(guo)家甘(gan)薯(shu)中心以“徐薯(shu)55-2”為父本、“紅(hong)東”為母本最新(xin)育成(cheng)的超(chao)短蔓優質高產(chan)食用及淀粉加(jia)工兼(jian)用型紅(hong)薯(shu)新(xin)品種(zhong)(zhong)。經(jing)國(guo)家種(zhong)(zhong)植試驗和(he)“食5紅(hong)薯(shu)”發明地陜西省(sheng)正陽縣梅營(ying)紅(hong)薯(shu)專(zhuan)業合(he)(he)作社(she)千畝(mu)種(zhong)(zhong)植試驗對比后發現，該品種(zhong)(zhong)是目前國(guo)內綜合(he)(he)表現較突出的紅(hong)薯(shu)新(xin)品種(zhong)(zhong)。

該紅薯有以下優點：一秧蔓短。一般蔓長60～80厘米，澇天不超過110厘米。二產量高而穩產。一般春薯畝產約為3500～4500公斤，夏薯畝產約為2500～3500公斤。三抗病性強。四口味好，薯形美觀。其薯口感香甜，軟糯。薯皮紅嫩，肉色金黃美觀。五淀粉含量高，干粉率約為23%～25%，制成粉條的粘度為900～1200，曬干率36%～38%左右。