Purple yam is also known as Purple Dioscorea, Purple Dioscorea, Purple Dioscorea.

The purple yam is a perennial herb belonging to the genus Dioscorea in the family Dioscoreaceae. Native to southern China and Southeast Asia, the purple yam is now widely cultivated throughout the country. The tubers of purple yam are oblong or ovoid, with purple or dark purple skin and white or yellowish flesh.

The purple yam is a deep-rooted plant with strong fertility tolerance, so it is important to choose a plot of land with deep, fertile and loose soil, warmth, a water table of more than 1 meter and good drainage for planting. Hilly areas suitable for single ditch single row planting, before the previous winter to planting ditch dug, according to the 120 cm belt demarcation line dug ditch, ditch width of 50 cm, depth of 60 ~ 100 cm.

Purchase of purple yam notes

1, appearance: you should choose smooth skin, no damage and disease spots of purple yam, the color should be bright and uniform.

2. Composition: Purple yam has different compositions and efficacies, you should choose the variety that suits your needs, such as tonifying the kidneys, moistening the lungs and lowering blood sugar.

3, smell: you should choose the purple yam that smells fresh and odorless, and avoid choosing products that smell musty or not fresh.

4, origin: you should choose the famous purple yam origin or have a good reputation of the brand of purple yam, in order to ensure the quality and safety of purple yam.

5, storage: purple yam should be stored in a cool, ventilated and dry place, avoiding direct sunlight and high temperature to prolong the preservation period.