Is yam a raw yam?
Alias of raw yam: yam, yam, yam, yam, yam, yam, yam, yam, yam, yam, wild yam, potato, wild yam, short crisp, buffalo tail yam, tops, Japanese yam, fingered citron yam, long yam, sweet potato, etc.
Dioscorea opposita is a precious medicinal material with the same origin as medicine and food. It originated in Henan and has the functions of invigorating spleen and stomach, nourishing liver and kidney. There are many producing areas of yam in China, but the yam produced in Jiaozuo City, Henan Province is the best. Jiaozuo was called Huaiqing House in ancient times, so the yam here is also called Huai Yam. Yam, also known as Dioscorea opposita, is native to northern China, and the main producing area is Henan. At present, it is widely planted in Henan, Hebei, Shandong, Shanxi and southwestern Guangxi, Fujian, Guangdong and Taiwan Province provinces, as well as Japan and South Korea. As one of the most important tonic materials in TCM, it has no side effects. Therefore, it has always been evaluated by doctors as "warming and nourishing" and "balancing nature", which is a model of "homology of medicine and food", that is, it can be used as normal food to satisfy hunger, and users have no taboos.
Is Huai yam an iron stick yam?
They are not the same yam.
Chinese yam
Yam, also known as yam, was originally called potato taro. It belongs to Dioscoreaceae and is a perennial plant. According to Compendium of Materia Medica, the name "Yu" is taboo. Turn yam into potato medicine. In the Song Dynasty, when the surname was Shu, the potato medicine was changed to yam.
Yam is shaped like radish. After peeling with chopsticks, the meat is white, and it is soft and delicious after cooking. Its tuberous roots can be used as medicine after peeling. Yam is cylindrical after processing, with yellow-white surface, smooth and hard texture, white powder in cross section, slightly sour and sweet, and sticky when chewing.
Yam is native to China, and is cultivated in all provinces in the north and south, especially in Huaiqing County. Dioscorea opposita, also known as sweet potato and ginseng, is the highest in China. "Shennong Materia Medica" said: "Yam is produced everywhere, especially in Huaiqing, Henan."
Yam contains soap alkali, mucus, allantoin, bile, arginine, amylase, protein, vitamins C, B, 4- dihydroxyphenylethylamine and so on. Mucus contains mannan and phytic acid. Sweet and flat in nature, it enters the lung, spleen and kidney meridians, and has the functions of strengthening the spleen to stop diarrhea, tonifying the lung and benefiting the kidney. Indications: chronic diarrhea due to spleen deficiency, chronic enteritis, cough and asthma due to lung deficiency, chronic nephritis, diabetes, nocturnal emission and frequent urination.
Yam is a good tonic, and it is known as "pregnant ginseng". According to Compendium of Materia Medica, "Chinese yam can tonify deficiency, remove cold and heat, tonify middle energizer, strengthen tendons and strengthen yin, keep eyes and ears alert for a long time, and strengthen body and prolong life."
Tiexian yam
Iron stick yam is the "best" of yam. It was once a tribute of the royal family in past dynasties and was known as the treasure of Chinese medicine. It can be eaten all year round and is suitable for all ages. Often used as a "tonic", 1994 won the gold medal in Panama World Expo.
Jiaozuo has applied for the national origin protection variety of "Tiegun Yam", which means that Tiegun Yam is a specialty of Jiaozuo, and it can only be called "Tiegun Yam" if it is cultivated in Jiaozuo.
The difference between yam and iron stick yam
Morphological discrimination: "iron stick yam" can be divided into clay yam and sand yam.
Among them, clay yam is short and its appearance is not very straight. However, because the clay is hard, the yam with clay has a hard texture, good taste and high nutritional value. Yam in sandy land is generally longer than yam in clay land, and its appearance is relatively straight. The sand is empty, so the yam in the sand is moist, its taste is not as good as that in clay, and its nutritional value is lower. But these are all relative. After all, it is still "iron stick yam", and its nutritional value is much higher than that of ordinary yam or foreign yam.
According to the analysis results of Chinese Academy of Sciences, Tiegun Yam is rich in 16% starch, mucus, glycoprotein, choline, vitamin C and mannose. It also contains 18 amino acids such as glutamic acid, tyrosine and alanine, and more than ten trace elements such as iron, calcium, zinc, phosphorus, manganese, cobalt and copper. The content of effective components is much higher than that of yam.