Yam grows on hillsides, valleys, forests, streams, roadside bushes or weeds at an altitude of150-1500m. 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.
Extended data:
1, the benefits of yam
(1) Regulating spleen and stomach
Yam contains amylase and polyphenol oxidase, which helps digestion. Many Chinese patent medicines that help digestion contain yam, which is a plant with homology of medicine and food. People with weak spleen and stomach, frequent indigestion and loss of appetite are suitable for eating yam.
(2) Benefiting lung and nourishing kidney
The mucus in yam has moisturizing effect, which is helpful to nourish lung yin and relieve cough for people who often cough due to lung deficiency. In addition, people with kidney deficiency, frequent urination and leucorrhea can eat some yam to help tonify the kidney.
2. Preventive measures
(1) Don't eat too much yam a day. Yam contains estrogen. Eating too much yam will stimulate the production of hormones, which will have side effects on women and aggravate the pain of women's physiological period.
(2) Yam contains amylase, and alkaline food will decompose the amylase of yam, reducing its edible value.
(3) Yam should not be eaten with pork liver, cucumber and pumpkin. The reason why yam can't be eaten with pig liver is that the rich metal trace elements in pig liver will destroy the vitamin C contained in yam, and the reason why yam can't be eaten with cucumber is that cucumber will decompose the vitamin C of yam.
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