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Objective To analyze the quality characteristics of Ripe Pu-erh tea from Pu'er City. Methods A total of 43 local fermented Ripe tea samples were collected from Pu'er City, and the quality characteristics of this batch of products were systematically analyzed by sensory evaluation combined with biochemical component detection. Results The color dry tea leaves were brown or reddish brown; the infusion were brown red or reddish brown; the aroma were mellow aged fragrance; the taste had typical pure characteristics of stale aroma; the infused leaves were reddish-brown and soft. Biochemical detection data showed that the content of tea sample water extract, tea polyphenols, free amino acids, soluble sugar and theabrownin in these tea samples were 38.7%-51.5%, 4.55%-11.16%, 1.56%-2.89%, 3.49%-8.27% and 6.84%-12.82%, respectively. The total content of catechins and flavonols were 6.76-18.23 mg/g and 0.18-1.90 mg/g, respectively. The content of theophylline and caffeine were 0.01-0.12 mg/g and 15.21-27.31 mg/g, respectively. The content of gallic acid was 1.22-6.56 mg/g. Conclusion Compared with the Ripe Pu-erh tea from other regions, Pu'er City-fermented tea samples demonstrates significantly higher levels of water extract, soluble sugars and free amino acids, coupled with relatively lower caffeine content. This distinctive biochemical composition corresponds to their sensory profile characterized by a thick mellow taste, pronounced sweetness, and reduces bitterness in the tea infusion. The study systematically delineates the sensory quality attributes and biochemical reference ranges of Ripe Pu-erh tea fermented in Pu'er City, providing scientific data support for future cross-regional comparative studies on the quality characteristics of Pu-erh tea.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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