Yam, yam, sweet potato, yam. It belongs to Dioscorea of Dioscoreaceae, and it is a twining herb vine. Tubers are long cylindrical and grow vertically. Stems usually purplish red, right, glabrous. Simple leaves, alternate in the lower part of the stem, opposite above the middle. Male inflorescences are spikes, 2-8 cm long, nearly erect, and 2-8 inflorescences are inserted in leaf axils.

Distributed in Korea, Japan and China; In China, it is distributed in Henan, Anhui, Jiangsu, Zhejiang, Jiangxi, Fujian, Taiwan Province, Hubei, Hunan, Guangdong, Guizhou, northern Yunnan, Sichuan, eastern Gansu and southwestern Shaanxi.

Extended data:

Dioscorea opposita grows in hillsides, valleys and forests at an altitude of150-1500m, and in bushes or weeds along streams and roadsides. It is a short-day and warm-loving crop. The optimum temperature for seedling growth is 15-20℃. The optimum growth temperature is 25-28℃, and the growth is slow below 20℃. It is suitable to grow in loose, fertile and deep soil, while flat species and block species can also grow in shallow and viscous soil.

Yam is drought-tolerant, but not waterlogging-tolerant, so it is not suitable for planting in soil with too shallow or too wet groundwater level. The water content of sandy soil and loam is about 65438 08%.

Baidu Encyclopedia-Hu Aishan

Baidu encyclopedia-yam