Potato, also known as potatoes, is a high starch tuber crops, the growth period of the seedling, the formation and growth of the tuber, starch accumulation period. Potato in the whole growth period, the absorption of potassium fertilizer, nitrogen fertilizer, phosphate fertilizer at least. Different growth periods have different characteristics of nutrient needs. At seedling stage, because of the rich nutrition of the tubers, it needs less nutrient, and it takes about 1/4 of the whole growth period. Tuber formation and growth period, the growth of shoots and tubers and tuber expansion, the need to be more fat, about the total amount of fertilizer 1/2. Starch accumulation period, the need for less nutrient, accounting for about 1/4 of the whole growth period. Can be seen that the formation of the tuber and the growth period of the nutrient supply is adequate, to improve the yield and starch content of potatoes play an important role.