Growth Environment and Quality of Gushu Black Tea

The southwest of China, represented by Yunnan, is the origin of tea trees in the world, and it is still the place where the ancient tea forest in China and even the world has the widest preservation area and the largest number of ancient tea trees and wild tea trees. Ancient tea grows in the Millennium ancient tea forest known as the "Tea Tree Natural Museum", with abundant rainfall, fertile soil and mild subtropical climate. Coupled with the diligence and wisdom of Bulang people, Bulang people planted tea trees in dense virgin forests, skillfully used biodiversity to control tea plant diseases and insect pests, provided rich fertilizers for tea trees through natural fermentation of fallen leaves and wild fruits, and effectively inhibited the growth of weeds. On these ancient tea trees, there is also a rare treasure-"crab feet". These growing environments make ancient tea a kind of rich and drinkable "fossil".

Gushu black tea belongs to yunnan black tea. Yunnan black tea, Yunnan is mainly produced in more than 20 counties in 6 prefectures along the Lancang River in Yunnan, including Lincang, Baoshan, Simao, Xishuangbanna, Dehong and Honghe. There are no four seasons in Yunnan province, which is very different from the 24 solar terms in the south of the Yangtze River. /kloc-From the end of 0/0 to May of the following year, affected by the airflow in the desert areas of India, Pakistan and Iran, it is an obvious dry season with abundant sunshine, dry air and little rainfall. From June to the beginning of 10, influenced by the southwest monsoon of equatorial ocean and the southeast monsoon of tropical ocean, it is an obvious rainy season with high temperature, high humidity, many days and heavy rainfall. The annual average temperature is 17-22 degrees Celsius, the annual average rainfall is1200-2000mm, and the relative humidity is over 80%. The soil is mainly latosol and latosol, and the PH value is 4.5-5.5. The loose sapropelic soil layer is deep, and the organic matter content is extremely high. Especially suitable for the growth of black tea.

Yunnan is located in the southwest border of China, with a geographical location of 97- 106 east longitude and 2 19 '-29 15' north latitude. The main tea-producing areas are basically distributed near the east-west latitude of 23 27'. This line is in the latitude range of no more than 3o near the Tropic of Cancer, which is called "biological eugenics area" by scientists. Of the 128 counties in the province, 120 counties produce tea, and the elevation of 23 key tea-producing counties is between1000-2000m. Yunnan is characterized by hot rainy season and cool dry season. The annual average temperature is kept between 15℃ and 18℃, and the average temperature difference between day and night exceeds 10℃. From the beginning of March to the end of 1 1, tea can be picked for 9 months in a year.

There are six mountains and five rivers in Yunnan, forming a complex landform with mountains and deep valleys. This broom-shaped terrain system and water system make the northwest of Yunnan high and the southeast low, which can not only resist the invasion of the continental climate in northwest China, but also accept the warm monsoon from the Indian Ocean and the Pacific Ocean, and change the temperature horizontally and vertically with the terrain, forming a unique plateau climate and mountain climate. The tea-growing area is characterized by rolling mountains, misty clouds, intertwined streams, abundant rainfall, fertile soil, rich in red and yellow loam and humus, and has unique natural conditions for producing tea.

The appearance of ancient black tea is fat and heavy, and the buds are mostly golden yellow; After brewing, the aroma is fresh and natural, showing honey and fruit fragrance; The soup is red, orange, gold, bright, clear and bright; Take a sip, fresh and mellow, lively and refreshing, and leave a fragrance on your teeth and cheeks; Look at the bottom of the leaf, the bud head is tender, fat and complete. It can be brewed continuously for more than 10 times, and the aroma is still rich, and the sweet and mellow feeling lingers in the mouth with endless aftertaste. Gushu black tea cake, after boiling and drinking, has a bright red soup color, a more mellow taste and a long aftertaste.