The difference between purple potato and sweet potato;

1, the nutritional value is different: purple sweet potato is rich in selenium and anthocyanin besides the nutritional components of ordinary sweet potato. Purple sweet potato is one of the main raw materials of anthocyanin.

2. Different appearance: The shape, skin color and flesh color of sweet potato roots vary with varieties or soils. Purple sweet potato has brown or black surface and white, yellow or purple cross section.

The picture below shows purple potato.

3. Different distribution: Sweet potato is native to South America and the big and small Antilles, and is widely planted in tropical and subtropical areas all over the world, and also in most parts of China. Purple sweet potato is distributed in Guangdong, Guangxi, Hunan, Hubei, Fujian, Sichuan, Yunnan, Guizhou, Shandong, Jiangxi and southwestern Shaanxi. It also exists in other tropical areas of Asia.

Extended data:

Sweet potato likes temperature, is afraid of cold, and is not cold-resistant. The suitable growth temperature is 22-30℃, and the growth will stop when it is lower than 65438 05℃. Purple sweet potato is a short-day crop, which needs sufficient light and high intensity. Sweet potato has strong adaptability to drought, the soil water capacity should be controlled at 60-70%, and the suitable water conditions can meet the needs of different growth periods. The suitable soil moisture for purple sweet potato growth is 60% ~ 80% of the maximum water capacity in the field. ?

References:

Baidu encyclopedia-sweet potato

Baidu encyclopedia-purple potato