《Nutrient Because》 Potatoes have high nutritional value and medicinal value. Generally, the ingredients contained in fresh potatoes are: starch 9 to 20%, protein 1.5 to 2.3%, fat 0.1 to 1.1%, Crude fiber 0.6~0.8%. Nutrients contained in 100g potatoes: calories 66~113J, calcium 11~60mg, phosphorus 15~68mg, iron 0.4~4.8mg, thiamine 0.03~0.07mg, riboflavin 0.03~0.11mg, niacin 0.4~ 1.1mg. In addition, potato tubers also contain carotene and ascorbic acid that are not found in cereal grains. From a nutritional point of view, it has more advantages than rice and flour. It can provide a large amount of heat energy to the human body and can be called a "perfect food." People can sustain life and health on potatoes and whole milk alone. Because potatoes have very comprehensive nutrients and a reasonable nutritional structure, but the amounts of protein, calcium and vitamin A are slightly lower; and this can be supplemented by whole milk. Potato tubers are rich in water, low in fat, and have very low calories per unit volume. They contain 10 times as much vitamin C as apples, 4 times as much B vitamins as apples, and several to dozens of times as many minerals as apples. , giving you a good feeling of fullness after eating. Potatoes can be cooked as food or vegetables. However, fresh potato tubers are large in size and have high water content, making transportation and long-term storage difficult. For this reason, countries around the world have paid great attention to the production of potato processed foods, such as French-style fried sticks, fried chips, instant whole flour, starch, and a wide variety of pastries, egg rolls, etc., with more than 100 types. The fresh stems and leaves of potatoes can be used as feed through silage, but they contain solanine, which must be prevented from causing livestock poisoning. In some areas of China, potato stems and leaves are used as green fertilizer, and its fertilizer effect is similar to that of milkvetch.