Yam is a common vegetable food. It is a short-day plant, which is suitable for planting in temperate regions and deep soil layers.

Yam is native to Korea, China and Japan, distributed in Zhejiang, Henan, Anhui, Jiangsu, Guizhou, Hubei, Hunan and Guangdong in China, and also cultivated in Nigeria and C? te d 'Ivoire. C? te d 'Ivoire and Ghana abroad.

Origin of yam varieties

Yam is also called yam egg and sweet potato. Its varieties include white-billed yam, hemp potato, hard-core yam, Ganoderma lucidum yam, Dahechang yam and yam. Among them, Dahechang yam originated in Japan and is widely planted in Pei County, Xuzhou City, Jiangsu Province, China.

Where is the origin of yam?

Yam is a specialty of Pingyao, Shanxi and Jiaozuo, Henan. It is planted in all provinces and regions in North China, Northwest China and the Yangtze River Basin, especially in Jiaozuo, Henan Province.

Yam from different producing areas

Iron yam

Iron stick yam is planted in Jiaozuo, Henan and Pingyao, Shanxi. It usually matures in October. It has low water content and thick juice. Its price is 4-8 yuan a catty.

Yamato taro yam

Dahe taro yam is planted in Xuzhou, Jiangsu. It usually matures in early October. It is long cylindrical and grows vertically. Its price is 6-9 yuan a catty.

common yam rhizomewinged yan rhizome, rhizome of common yam

Dioscorea opposita is cultivated in Huaiqing, Henan Province, China. It usually matures in September. Its taste is dry and greasy, sweet and fragrant. The price is about 6 yuan a catty.

Yam yam

Yam is planted in a large area in Yinshan area of China. It usually matures in October. It contains a lot of mucus and its cross section is white. The price is about 4-6 yuan a catty.