品種審定編號：國審薯2002006

作物種類：甘薯

品種名稱：渝蘇303

選育單位：江蘇省農業科學院糧食作物(wu)研究(jiu)所、西南師范大(da)學

品種來源：母本：寧B58-5；父本：蘇薯1號。

省級審定情況：1997年(nian)、1998年(nian)、1999年(nian)、2000年(nian)分別由(you)四川省、重慶市、江蘇省、江西省農作物品(pin)種審定委員會審定

特征特性：該品種為(wei)兼用型(xing)品種。頂葉(xie)(xie)(xie)綠(lv)色，葉(xie)(xie)(xie)片心臟形(xing)(xing)，深綠(lv)色，葉(xie)(xie)(xie)脈紫色，莖(jing)(jing)色綠(lv)帶紫，長蔓型(xing)，莖(jing)(jing)粗0.55厘米左右,單株分枝(zhi)7～8個。薯(shu)形(xing)(xing)長紡錘形(xing)(xing),薯(shu)皮紅色,薯(shu)肉淡黃(huang)色,單株結(jie)(jie)薯(shu)數3～4個,結(jie)(jie)薯(shu)整(zheng)齊,結(jie)(jie)薯(shu)早(zao),商品薯(shu)率高，烘干率為(wei)30.3%,粗淀粉18.5%,食味干面香甜。抗根腐病和黑(hei)斑病，不抗莖(jing)(jing)線蟲(chong)病。

產量表現：1994、1995年(nian)四川(chuan)(chuan)省(sheng)(sheng)甘(gan)薯(shu)(shu)(shu)品種區域試驗，兩(liang)年(nian)鮮(xian)薯(shu)(shu)(shu)平均(jun)(jun)畝(mu)產(chan)(chan)(chan)(chan)(chan)(chan)(chan)1884.2公(gong)斤(jin)(jin),比對(dui)照南(nan)薯(shu)(shu)(shu)88減產(chan)(chan)(chan)(chan)(chan)(chan)(chan)2.3%；薯(shu)(shu)(shu)干平均(jun)(jun)畝(mu)產(chan)(chan)(chan)(chan)(chan)(chan)(chan)為(wei)576.6公(gong)斤(jin)(jin),比對(dui)照南(nan)薯(shu)(shu)(shu)88增(zeng)(zeng)(zeng)產(chan)(chan)(chan)(chan)(chan)(chan)(chan)4.6%；莖葉畝(mu)產(chan)(chan)(chan)(chan)(chan)(chan)(chan)1426.4公(gong)斤(jin)(jin),比對(dui)照南(nan)薯(shu)(shu)(shu)88增(zeng)(zeng)(zeng)產(chan)(chan)(chan)(chan)(chan)(chan)(chan)19.8%。1996年(nian)參(can)加四川(chuan)(chuan)省(sheng)(sheng)生(sheng)產(chan)(chan)(chan)(chan)(chan)(chan)(chan)試驗，鮮(xian)薯(shu)(shu)(shu)畝(mu)產(chan)(chan)(chan)(chan)(chan)(chan)(chan)1526.8公(gong)斤(jin)(jin),比南(nan)薯(shu)(shu)(shu)88增(zeng)(zeng)(zeng)產(chan)(chan)(chan)(chan)(chan)(chan)(chan)8.4%,平均(jun)(jun)薯(shu)(shu)(shu)干畝(mu)產(chan)(chan)(chan)(chan)(chan)(chan)(chan)469.5公(gong)斤(jin)(jin),比南(nan)薯(shu)(shu)(shu)88增(zeng)(zeng)(zeng)產(chan)(chan)(chan)(chan)(chan)(chan)(chan)16.2%。1997、1998年(nian)江(jiang)蘇省(sheng)(sheng)甘(gan)薯(shu)(shu)(shu)品種區域試驗，兩(liang)年(nian)鮮(xian)薯(shu)(shu)(shu)平均(jun)(jun)畝(mu)產(chan)(chan)(chan)(chan)(chan)(chan)(chan)2608.4公(gong)斤(jin)(jin),比對(dui)照徐薯(shu)(shu)(shu)18增(zeng)(zeng)(zeng)產(chan)(chan)(chan)(chan)(chan)(chan)(chan)29.2%,增(zeng)(zeng)(zeng)產(chan)(chan)(chan)(chan)(chan)(chan)(chan)極顯(xian)著;薯(shu)(shu)(shu)干平均(jun)(jun)畝(mu)產(chan)(chan)(chan)(chan)(chan)(chan)(chan)為(wei)752.5公(gong)斤(jin)(jin),比對(dui)照徐薯(shu)(shu)(shu)18增(zeng)(zeng)(zeng)產(chan)(chan)(chan)(chan)(chan)(chan)(chan)17.3%,增(zeng)(zeng)(zeng)產(chan)(chan)(chan)(chan)(chan)(chan)(chan)極顯(xian)著。1998年(nian)參(can)加江(jiang)蘇省(sheng)(sheng)生(sheng)產(chan)(chan)(chan)(chan)(chan)(chan)(chan)試驗,平均(jun)(jun)鮮(xian)薯(shu)(shu)(shu)畝(mu)產(chan)(chan)(chan)(chan)(chan)(chan)(chan)2496.9公(gong)斤(jin)(jin),比對(dui)照徐薯(shu)(shu)(shu)18增(zeng)(zeng)(zeng)產(chan)(chan)(chan)(chan)(chan)(chan)(chan)29.0%,平均(jun)(jun)薯(shu)(shu)(shu)干畝(mu)產(chan)(chan)(chan)(chan)(chan)(chan)(chan)753.7公(gong)斤(jin)(jin),比徐薯(shu)(shu)(shu)18增(zeng)(zeng)(zeng)產(chan)(chan)(chan)(chan)(chan)(chan)(chan)26.3%。

栽培技術要點：春(chun)薯(shu)栽插(cha)密度3300-3500株/畝，夏薯(shu)3500-3800株/畝。施足基肥(fei)，以復合肥(fei)為佳，開好排水溝，降低田間水位。

全國品審會審定意見：經(jing)審核，該(gai)品種符(fu)合國(guo)家甘薯(shu)品種審定(ding)標(biao)準(zhun)，通過(guo)審定(ding)。適宜在江蘇(su)、江西、重慶、四川等(deng)省（市）種植(zhi)。