土豆被誉为“地下苹果”。因为它生长在地下,物美价廉,营养丰富,可以和苹果比高低。在土豆内,淀粉占第一位,高达20%以上。其次是蛋白质,占2～3%。土豆的蛋白质虽然赶不上鸡蛋和肉类,但它能很快被人体吸收。土豆还含有磷、铁等无机盐和多种维生素。其中对人有很大作用的维生素C,在刚收获的鲜土豆里,每100克含40毫克,比苹果的维生素C含量高一倍多。据科学测定. Potato is known as “underground apple.” Because it grows in the ground, inexpensive, nutritious, and Apple than the level. In potatoes, starch accounts for the first place, up to 20% or more. Followed by protein, accounting for 2 to 3%. Although the potato protein can not keep up with eggs and meat, but it can be quickly absorbed by the body. Potatoes also contain phosphorus, iron and other inorganic salts and vitamins. Vitamin C, which has a large effect on people, is 40 mg per 100 g in freshly harvested fresh potatoes, more than twice as much as an apple’s vitamin C content. According to scientific determination.