Dioscorea (scientific name: Dioscorea polystachya? Turczaninow) is a plant of Dioscorea in Dioscoreaceae, which is intertwined with herbaceous vines. 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. Capsule does not fold; Seeds are implanted in the middle of each ventricular axis. The flowering period is from June to September, and the fruiting period is July-165438+1October.
Growing environment:
It grows on slopes, valleys, forests, streams, roadside bushes or weeds at an altitude of 150- 1500m. Dioscorea opposita 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-Yam