Brief introduction of white yam

White yam, twined with herbs and vines, medium growth, round and purple stems, sometimes with green stripes, right-handed, 3-5 meters long; There are fewer branches. Simple leaves, alternate leaves in the lower part of the stem, opposite leaves in the middle and upper parts, rarely whorled; The leaf length is 6.0 cm (4. 1~8.0), the width is 6.2 cm (3.5~9.0), and the petiole is 5.4 cm (3.2 ~ 8.5). Both sides are smooth and pilose, with dark green surface and gray back; Full wavy or shallow wavy edges; The base has a deep heart shape and a wide heart shape. Tubers are cylindrical, 90 ~120cm long and 3 ~ 5cm in diameter. Single plant weight 1000~ 1900 g, seed length, length 10-20 cm. Pure white section, dense, excellent quality; Brown skin, dense fibrous roots, large and dense tumors, delicate taste, high nutritional value, pure green food and no pollution. Since ancient times, there has been a saying that "Yam Yam is a medicine in the mountains". Name: Dioscorea zingiberensis (Jade)

Latin scientific name: yam

Nicknames: Yam, Yam, Yam, Yam, Yam, Yuyan. Smell: (root) sweet, warm, flat and nontoxic.

English names: Nagaimo, Yamaimo, Chinese Yam, Japanese yam, Korean yam;

According to "Compendium of Materia Medica", yam was changed into a taboo for potato medicine because Tang Daizong was called Li Yu, and it was changed into a taboo for yam because Song Yingzong was called Zhao Shu. Yam is one of the ingredients of Liuwei Dihuang Pill. Domain: Eukaryotic domain

Field: the plant kingdom in the plant kingdom

Door: angiosperm magnolia door

Class: monocotyledonous Liliaceae

Objective: Dioscorea.

Family: Dioscoreaceae

Genus: Dioscorea

Type: Chinese yam.

geographical distribution

There are 650 species of monocotyledons 10 genus, which are widely distributed in temperate and tropical regions of the world. There are about 80 species of Dioscorea in China.

Originally from Pingyao and Jiexiu, Shanxi, it is now distributed in North China, Northwest China, Jiangxi, Hunan and other places in the Yangtze River Basin.

Growers call it domestic yam, and wild sweet potatoes call it wild yam; Chinese herbal medicines include Chinese yam and Chinese yam.

Because of its rich nutrition, it has been regarded as a good tonic with good quality and low price since ancient times. Can be used as staple food, vegetables, and snacks such as candied haws.

China is mainly produced in the northern part of Henan Province, and also cultivated in Shandong, Hebei, Shanxi, Central South and Southwest China. After the stems and leaves wither in winter, dig, cut off the roots, wash and dry.

There are two main kinds of yam cultivated in China: common yam and sweet potato. Ordinary yam tuber is small, especially the yam produced by Guhuaiqing Prefecture (now Jiaozuo, Henan Province, including Aibo, Qinyang, Wuzhi and wen county counties) is extremely precious, known as "Huai Yam" and "Huai Shen", ranking first in the country.

At present, Chinese yam in three places in China has applied for national geographical indication protection products. One is "iron stick yam", which is produced in Qinyang, Jiaozuo, Henan; One is "Chenji Yam", which is produced in Jeffery Ji, Heze City, Shandong Province, including "Goose Skin Rough Yam" and "Xishi Seed Yam"; One is "bergamot yam", which is produced in Wuxue, Hubei; In addition, the yam in Nanyang Township, Ruichang City, Jiangxi Province has recently applied for a national geographical indication protection product, and the "Xiaobaizui" Baishan medicine in Cao Zhuang, Anping County has also applied for a national patent.