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双丰4号是山东省农业科学院蔬菜研究所育成的早熟马铃薯新品种,1998年经山东省农作物品种审定委员会审定定名。其生育期(出苗至收获)65天左右。植株长势较强,平均株高50 cm左右,分枝性中等。株型直立,叶片平展、色深。结薯集中。单株结薯3～4块,大中薯比例达到85.6%。薯块扁椭圆形,黄皮黄肉,芽眼浅。秧薯比(重量比)为1:1.08。春薯平均亩产2300 kg以上。田间高抗花叶病毒病,中抗卷叶病毒病,抗环腐病和疮痂病。
Shuangfeng No. 4 is a new breed of precocious potato cultivated by the Vegetable Research Institute of Shandong Academy of Agricultural Sciences. In 1998, it was approved by Shandong Crop Variety Approval Committee. Its growth period (emergence to harvest) about 65 days. Plant growth is strong, the average height of about 50 cm, branching medium. Plant type erect, flat leaves, color depth. End potato concentration. 3 to 4 tubers per plant, large and medium-sized potato reached 85.6%. Potato oblate, yellow yellow meat, bud eyes light. Seedling ratio (weight ratio) of 1: 1.08. The average yield of spring sweet potato more than 2300 kg. Field high anti-mosaic virus disease, anti-curly leaf virus disease, anti-ring rot and scab.