Where is the origin of yam?

The main producing areas of yam in my country are Henan, Jiangsu, Guangxi, Hunan and other places.

However, those produced in Huaiqing, Henan have the best quality and are regarded as authentic medicinal materials.

It is excavated after frost, scraped off the rough skin, dried in the sun or oven, and is called hairy yam.

Yam cultivation history

Yam has a long history of cultivation in my country.

The name also changed several times.

"The Classic of Mountains and Seas" calls it gourd.

my country's earliest pharmaceutical monograph "Shen Nong's Materia Medica" refers to dioscorea, also known as potato.

"Wu Pu's Materia Medica" calls it Yuyan.

Dioscorea was renamed as yam. It is said that it was to avoid the taboo of Emperor Yingzong of the Tang and Song Dynasties. As stated in "Compendium of Materia Medica" by Kou Zongshuang of the Song Dynasty: The original name of yam was to avoid the taboo of Yingzong of the Song Dynasty (Sh). , Tang Dynasty's taboo (Yu) and was renamed yam.

The edible value of yam

Yam is an ancient vegetable, and it is also regarded as a good tonic and loved by the world.

Lu You, the great poet of the Southern Song Dynasty, praised in his "Sweet Yam Soup": I always lived with a handful of thatch by the lake, and used to drink yam in the village wine.

From then on, all eight delicacies were avoided, and Tiansu Tuo tasted like sweet soup.

As a daily vegetable, yam is loved not only by Chinese people, but also by Japanese people.

In addition to eating boiled yam, Japanese people also like to eat yam paste made from raw yam.

Add soy sauce and other seasonings into the ground yam paste, mix well, and cover it with rice. This kind of rice is called yam paste rice bowl.

The medicinal value of yam

The use of yam as medicine was first recorded in the "Shen Nong's Materia Medica". It is said that it is mainly used to injure the middle, tonify deficiency, remove cold and heat evil spirits, tonify the middle and replenish strength, and grow muscles. , keep your eyes and ears smart for a long time.

It is listed as top grade.

"Materia Medica Seeking Truth" records that yam is a food, and the ancients used it in decoctions, saying that it nourishes the spleen, replenishes qi and removes heat.

The temperature is flat and it nourishes the yin of the spleen and lungs, so it can moisturize the fur and grow muscles.

And its astringent nature can cure spermatorrhea.

It tastes sweet and salty, and can benefit the kidneys and strengthen yin. However, although the nature is yin, it is not stagnant, so it can exude dampness to stop diarrhea. "Compendium of Materia Medica" claims that it can nourish kidney qi, strengthen the spleen and stomach, and relieve diarrhea. It relieves diarrhea, resolves phlegm and saliva, and moisturizes the fur.