We often see the phrase “better climate” in the relevant literature of good Pu-erh tea. However, how the climate of Yunnan is “blessed” is perhaps not clear. Today we will tell you from three aspects of heat, moisture and light, why is Yunnan good tea?
First, heat of good Pu-erh:
If you think that the concept of heat is too strange, you can understand it as temperature, which is the main factor determining whether tea trees can grow. The suitable growth temperature range of Yunnan big leaf tea plant is 16 °C ~ 20 °C, and the active accumulated temperature of the growth (ie the sum of the daily activity temperature of a crop or a growing season, usually will be greater than or equal to 10 °C for the duration The average daily temperature is calculated to be in the range of approximately 5,500 ° C to 7,500 ° C.
According to the available data, 80% of the province’s territory belongs to the subtropical zone. If you listen to this name, you should know that it should not be too cold. This is also true. Several of the more famous tea producing areas in Yunnan are usually warmer.
For example, Fengqing, it belongs to the northern subtropical zone, its annual average temperature is about 16.6 °C, and the active accumulated temperature is 5594.1 °C. It is not difficult to find that the thermal conditions of Fengqing are in full accord with the optimal growth conditions of the large-leaved tea tree, which is one of the reasons for the well-known Fengqing big leaf species.
Second, moisture of good Pu-erh:
Moisture can be divided into two parts, one is rainfall and the other is humidity. Moisture is a controlling factor in the growth of tea trees. The annual average annual precipitation of tea trees is about 1000mm~2000mm, and the suitable relative humidity of air is 70%~90%.
According to the data collected and listed in Yunnan Tea System Ecology, the annual average annual precipitation of 60 major tea-producing cities in Yunnan Province ranges from 800.7mm to 2747.6mm, which can generally meet the needs of tea tree growth; The average relative humidity of the county and city is less than 70%, and the relative humidity of the other tea-producing cities and towns is within the range of 70% to 90%.
At the same time, Yunnan tea area has another prominent feature – fogging. The fog can be generally divided into the foggy sea that appears in the dry season and the mountain fog that appears in the rainy season. Fog reduction can compensate for part of the precipitation required by the crop and reduce leaf evaporation.
Third, the light of good Pu-erh:
Photosynthesis refers to the use of sunlight to synthesize carbon dioxide and water absorbed by plants into organic matter. Plants continue to accumulate organic matter such as sugar, starch, fatty acids and various organic matter in the process.
The duration of illumination is an important factor in photosynthesis. The sunshine time is long, the tea tree grows rapidly, develops soundly, and is not susceptible to pests and diseases; on the contrary, when the tea leaves are less exposed to sunlight, the tea is thin and the leathery layer of the leaves is thinner.
The annual sunshine duration of Yunnan Province is between 1000h and 2800h. The average sunshine rate in tea-producing areas is 48%, the sunshine duration is over 2100h, the rainy season is more than 900h, accounting for 44%, and the dry season is 1200h, accounting for 56%.
For example, Lincang, which is the main tea producing area, has a total sunshine duration of 1333.1h in the dry season. Even in the rainy season, there are nearly 900 hours of total sunshine duration. The total sunshine duration is 2231.3h and the sunshine rate can reach 50%.
Now you understand, why is good Pu-erh tea “blessed”?
But this is only part of the reason, we will continue to introduce you to other reasons in the next issue!