The origin and environment of Ziyang selenium-rich tea

The Ankang Tea Area where Ziyang County is located has excellent ecology. The city has a humid and mild climate, fresh air, interdependent mountains and rivers, and beautiful scenery. Due to the double barrier of the Qinling Mountains and Phoenix Mountains in the north, which is high in the northwest and low in the southeast, it can block the intrusion of cold currents from the northwest in winter, and can fully accept the warm and humid airflow from the southeast in summer, thus forming a climate with no severe cold in winter and humid summers. The annual average temperature is 12.1-15.7℃, and the annual average precipitation is 700-1100 mm. In addition, most of the tea-friendly soil in the area is yellow-brown soil with rich organic matter content. The water and heat resources are abundant during the tea tree growing season, which is very conducive to the growth of tea trees. It is called It is recognized as the most suitable place for human life and the growth of tea trees at the same latitude on the earth.

The city has a beautiful ecological environment, with a forest coverage rate of 60%, and some counties are as high as 80% or more. There are more than 80 natural and cultural landscapes of various types, 11 forest parks, 4A-level scenic spots and 1 national geological park. One, two in 3A level. There are 941 rivers with a drainage area of ??more than 5 square kilometers. The Han River, the largest tributary of the Yangtze River, flows through the entire territory from west to east. The water quality of the Han River remains above Grade II all year round. It is an important water source conservation area for the country's implementation of the South-to-North Water Diversion Middle Route Project. There are 4,612 species of various wild plants and 430 species of wild animals in the city. Giant pandas, golden monkeys, takin, giant salamanders, and the world's rare bird crested ibis, known as the "Oriental Jewel", coexist harmoniously with people and tea trees. The transitional geographical location between north and south and good ecological environment and climate characteristics have given birth to rich natural resources and unique regional products. It is known as a biological gene bank and a natural oxygen bar. There were 363 days of grade II or above weather throughout the year. The beautiful Qinba-Han River, beautiful ecological environment, and rich history and culture have become the inexhaustible source and driving force for the production, circulation, scientific research, and cultural development of Ankang tea.

71% of counties across the country are deficient in selenium, and Ziyang is a selenium-rich area. The trace element selenium is absorbed by tea trees and converted into organic selenium proteins. After years of research, Professor Liu Rongbiao of National Taiwan University found that oolong tea produced in Quanzhou, Fujian Province can inhibit the growth of cancer cells because it is rich in selenium. Ziyang tea contains more selenium than oolong tea, so some people call tea "the drink of the atomic age", and it is not unfounded to call Ziyang tea "a good medicine for longevity". As early as the Qing Dynasty, someone discovered the medicinal value of Ziyang tea: "Tea is the coldest in nature and can cure diseases, sober up alcohol and eliminate food, clear the mind and improve eyesight." ("Ziyang County Local Chronicles") This discovery has been proven by contemporary scientific research institutes .