Purple sweet potato: Purple sweet potato (Ipomoea batatas (L.) Poir. Convolvulaceae sweet potato) is also called black sweet potato, and its flesh is purple to deep purple. It is rich in selenium and anthocyanins besides the nutrients of ordinary sweet potato. Purple sweet potato is one of the main raw materials of anthocyanin.

Sweet potato: sweet potato (scientific name: Ipomoea? Batatas), also known as sweet potato, sweet potato, sweet potato, sweet potato, sweet potato, sweet potato, sweet potato, sweet potato, sweet potato, sweet potato and pillow potato. Common perennial dicotyledonous plants, herbs, with slender vines and creeping stems. Root tuber, which produces lactic acid by anaerobic respiration, has white or red skin color, and the meat is mostly yellow-white, but it also has purple. Besides being used for food, it can also be used to make sugar, wine and alcohol.

Yellow potato: Yellow potato was bred by hybridization in Taiwan Province Chiayi Agricultural Laboratory. Trial planting was introduced in 200 1 year, with high yield, high sugar content, beautiful color, crisp and sweet raw food without residue, and sweet and soft cooked food. In 2000, it was tested all over the country and performed well.