Full
Outline
To investigate the sensory characteristics and determine the biochemical components of different grades of Daguan Cuihua tribute tea.
The 5 green tea samples were selected, including flat-shaped tea and 4 grades of golden ear curly tea (special grade I, special grade III, grade I, grade II). Sensory evaluation shall be conducted in accordance with GB/T 23776—2018 Methods for sensory evaluation of tea. The content of water extract,tea polyphenols, free amino acids, catechins, caffeine and flavonoids were determined using the constant weight method,folin-phenol colorimetry, ninhydrin colorimetry and high performance liquid chromatography, respectively.
Golden ear special grade II showed the highest water extract content (49.37%), while golden ear special grade III had the lowest (42.67%). The content of free amino acids (2.34%) and tea polyphenols (32.52%) in flat-shaped tea were both significantly higher than those in other samples, whereas golden ear grade II had the significantly lowest free amino acid content (1.33%). Sensory evaluation results indicated that flat-shaped tea presented a “rich, mellow and refreshing taste with prominent bean fragrance”, golden ear special grade I “tasted fresh, strong and mellow with distinct tender aroma”,and golden ear special grade III “delivered fresh, strong and rich flavor with lasting sweet aftertaste and obvious tender aroma”, while golden ear grade I and II had relatively weaker taste intensity.
Daguan Cuihua tribute tea exhibits excellent sensory evaluation and abundant biochemical components, making it suitable for development as a premium green tea in Yunnan.
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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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