岩薯５号丰产性、稳产性及适应性俱佳。在福建省甘薯新品种区域试验中，两年平均每公顷鲜薯４０７０ｔ、折成薯干产量１０６４ｔ，分别比对照新种花增产３４３％和３１３％。该品种薯块晒干率２６％、出粉率１１６％。以鲜基计，每百克含胡萝卜素７７ｍｇ、可溶性糖５３７９ｍｇ；以干基计，含粗蛋白４３８％、粗脂肪１７％、磷００８４％、钾１３２％。岩薯５号萌芽性与耐贮性好，高抗蔓割病，薯形光滑美观，商品性好，适宜加工甘薯系列食品。 Iwatani 5 high yield, stability and adaptability are good. In the regional trial of sweet potato variety in Fujian Province, the average annual fresh potato yield was 4070t and the dry yield of potato was 1064t, 343% and 313% higher than that of the control new species. The variety of dried potato tuberosity rate of 26%, the output rate of 11  6%. On a fresh-based basis, the content of carotene is 77mg and 5379mg, respectively, on the basis of dry weight. The content of crude protein is 438%, crude fat is 17%, phosphorus is 0.84% ​​and potassium is 10 32%. Iwatani 5 germination and storage resistance is good, high resistance to Misei, potato smooth and beautiful, good merchandise, suitable for processing sweet potato series of food.