The edible part of sweet potato is fat root, which is rich in nutrition and contains sugar and protein. Can be used as fruit, fried, stewed, boiled or starched. Modern poet Cheng said in "Bean Potato": "With time, vines are fresh and tubers are out of reach." This shows that the tuber of potato is edible.
Bean potato, Leguminosae, is a stout twining herb vine with thick and flat roots. The flowers are small, polygonal, with many petals, and the corolla is lavender or reddish; The fruit is large with purple or light brown skin; Flowering from April to June; The fruiting period is July-August.
Native to tropical America, it is cultivated in many tropical areas. Taiwan Province, Fujian, Guangdong, Hainan, Guangxi, Yunnan, Sichuan and Guizhou in China; It is cultivated in Hunan and Hubei.
Type change
1. Early-maturing variety: the plant has medium growth potential, small leaves, early root expansion and short growth period. The root tuber is oblate or spindle-shaped, with thin skin and few fibers. The weight of a single root is 0.4 ~ 1 kg, and it is eaten fresh or fried. Its varieties are: Ping Huang sweet potato in Guizhou, Suining sweet potato in Sichuan, Mumashan sweet potato in Chengdu, Malay in Taiwan Province and Shage in Shunde, Guangdong.
2. Late-maturing varieties: plants have strong growth potential, long growth period and late maturity of tuberous roots. The root tuber is flat spindle-shaped or cone-shaped, with thick skin, many fibers, high starch content and little water. Single weight 1 ~ 1.5 kg, and the maximum can reach more than 5 kg. Suitable for processing and grinding. Commonly used varieties are: Oryza Glutinosa in Zhanjiang, Guangdong, Lagerstroemia indica in the suburbs of Guangzhou, and Castanea henryi in Taiwan Province Province.
3. The oblate variety with small leaves, moderate growth potential, early maturity and good quality should be selected in the northern region. The weight of single potato fruit is 250-500g, and the root surface has 4- 10 longitudinal grooves.
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