If the food roots appear exposed during the growth process or are not stored in the warehouse in time after harvest, the cells will differentiate into chloroplast organelles to help photosynthesis, and the existence of chloroplasts will lead to the green skin of Chinese yam. 2, moldy

If yam is not properly preserved, bacteria will breed on the surface, and a large number of green molds will breed, and the skin of yam will turn green. 3, iron scraper oxidation < P > Scraping the yam skin with some iron scrapers with poor quality will also lead to the green part of the yam skin, which is actually free iron ions.

2 How to prevent the skin of yam from turning green 1. Keep yam out of direct contact with sunlight

Yam will not produce chlorophyll without direct contact with the skin of sunlight, so that the skin of yam will not turn green. 2. No iron scraper < P > A bad iron scraper will also make the yam skin green, so you don't need an iron scraper when eating yam. 3. Good preservation

The moldy yam skin will turn green due to improper preservation, so put the yam in a cool, ventilated and dry place, and keep it away from moisture, so that the yam will not turn green. 3 how to eat the yam skin when it turns green

1. If the yam skin turns green after irradiation, you can cut off the green part of the yam skin so that it can be eaten directly.

2. If the iron turns green, you can scrape the yam and clean it several times, but you can scrape it a little again if you are not at ease.

3. Don't eat the moldy yam skin, because once it appears moldy, it means that the inside of yam is full of mold, which will affect your health, so it is not recommended to eat it.