不同温度热风萎凋对红茶萎凋叶及成茶品质的影响

doi:10.13305/j.cnki.jts.2024.03.007

摘要/Abstract

摘要： 以湘西古丈县茶树群体品种夏季一芽二叶茶鲜叶为原料,在传统红茶加工工艺的基础上,用热风萎凋工艺替代传统室内自然萎凋工艺,从感官品质、滋味品质成分和香气品质成分3个方面,研究分析了35 ℃、45 ℃、55 ℃、65 ℃ 4种热风萎凋工艺对夏秋红茶品质的影响。结果表明,与25 ℃传统室内自然萎凋的红茶相比,采用45 ℃热风萎凋工艺制作的成茶综合感官品质较好,干茶色泽乌褐较润,汤色红艳明亮,滋味醇厚较爽,有甜香;其茶多酚、没食子酸、EGCG、茶黄素、茶红素含量,以及茶黄素和茶红素总量与茶褐素含量的比值（TFRB）均显著升高（P<0.05）,而可溶性糖含量显著降低（P<0.05）;香气品质成分种类增加,其中醇类香气品质成分占比最高,为70.47%,且醇类、酮类和酯类香气品质成分相对含量显著增加（P<0.05）,而吡咯类、醛类香气物质显著降低（P<0.05）,检测出反-3-己烯醇、2,3-二氢-2,2,6-三甲基苯甲醛、α-紫罗兰酮等具有花果香气品质的香气成分。研究表明,采用适当温度的热风萎凋有利于提高红茶品质,可应用于提高夏秋季红茶品质的生产实践。

关键词: 红茶加工, 热风萎凋, 感官品质, 生化成分, 香气成分

Abstract: Based on the traditional black tea processing technology, the hot air withering process was used to replace the traditional indoor natural withering process on the basis of the traditional black tea processing technology. The effects of four hot air withering processes of 35 ℃, 45 ℃, 55 ℃ and 65 ℃ on the quality of summer and autumn black tea were studied and analyzed from three aspects of sensory quality, taste quality and aroma quality. The results show that compared with 25 ℃ traditional indoor natural withering black tea, the comprehensive sensory quality of black tea processed by 45 ℃ hot air withering process was better. The color of dry tea was dark brown and moist, the soup color was red and bright, the taste was mellow and refreshing, and the quality characteristics was sweet aroma. At the same time, the contents of tea polyphenols, gallic acid, EGCG, theaflavins, thearubigins and the ratio of the sum contents of theaflavins and thearubigins to the content of theabrownins (TFRB) significantly increased (P<0.05), while the content of soluble sugar decreased significantly (P<0.05). The types of aroma quality components increased, among which alcohols accounted for the highest proportion (70.47%), and the relative contents of alcohols, ketones and esters increased significantly (P<0.05), while pyrroles and aldehydes decreased significantly (P<0.05). And the aroma components with flower and fruit aroma such as trans-3-hexenol, 2,3-dihydro-2,2,6-trimethylbenzaldehyde and α-ionone were detected. This shows that hot air withering with appropriate temperature is conducive to improving the quality of black tea, which can be applied to the production practice of improving the quality of black tea in summer and autumn.

Key words: black tea processing, hot air withering, sensory quality, biochemical components, aroma components

中图分类号:

S571.1
TS272

张湘琳, 凌智辉, 胡维霞, 向春辉, 崔俪丹, 许伟, 肖文军. 不同温度热风萎凋对红茶萎凋叶及成茶品质的影响[J]. 茶叶科学, 2024, 44(3): 483-492. doi: 10.13305/j.cnki.jts.2024.03.007.

ZHANG Xianglin, LING Zhihui, HU Weixia, XIANG Chunhui, CUI Lidan, XU Wei, XIAO Wenjun. Effects of Different Temperature Hot Air Withering on Withered Leaves and Tea Quality of Black Tea[J]. Journal of Tea Science, 2024, 44(3): 483-492. doi: 10.13305/j.cnki.jts.2024.03.007.

参考文献

[1] Zhang H, Qi R L, Mine Y.The impact of oolong and black tea polyphenols on human health[J]. Food Bioscience, 2019, 29: 55-61.
[2] 崔俪丹, 张湘琳, 项希, 等. 微波初干工艺对红茶品质的影响[J]. 茶叶科学, 2021, 41(3): 406-418.
Cui L D, Zhang X L, Xiang X, et al.The effect of initial microwave drying on black tea quality[J]. Journal of Tea Science, 2021, 41(3): 406-418.
[3] 张春花, 寸德馨, 颜学行, 等. 不同萎凋时间对云南微波干燥红茶中色素类物质含量影响的研究[J]. 茶叶通讯, 2022, 49(4): 483-489.
Zhang C H, Cun D X, Yan X X, et al.Effects of different withering time on the content of tea pigments in yunnan black tea dried by microwave[J]. Journal of Tea Communication, 2022, 49(4): 483-489.
[4] Liang S, Wang F, Chen J X, et al.Optimization of a tannase-assisted process for obtaining teas rich in theaflavins from Camelia sinensis leaves[J]. Food Chemistry: X, 2022, 13: 100203. doi: 10.1016/j.fochx.2022.100203.
[5] 仇方方, 余志, 艾仄宜, 等. 萎凋温度、湿度及风速对红茶品质的影响[J]. 中国茶叶, 2014, 36(11): 22-25.
Qiu F F, Yu Z, Ai Z Y, et al.Effects of withering temperature, humidity and wind speed on the quality of black tea[J]. China Tea, 2014, 36(11): 22-25.
[6] 赵文霞, 黄亚辉, 张敏, 等. 萎凋温度和时间对潮州红茶品质的影响[J]. 广东茶业, 2013(5): 22-24.
Zhao W X, Huang Y H, Zhang M, et al.Effects of withering temperature and time on the quality of Chaozhou black tea[J]. Guangdong Tea Industry, 2013(5): 22-24.
[7] 王伟伟, 江和源, 江用文, 等. 不同萎凋时间对CTC红碎茶品质的影响[J]. 中国农学通报, 2016, 32(4): 129-135.
Wang W W, Jiang H Y, Jiang Y W, et al.Effect of withering time on CTC black tea quality[J]. Chinese Agricultural Science Bulletin, 2016, 32(4): 129-135.
[8] 李双荣, 吴成远, 杨永泽, 等. 不同加工工艺对野生白茶感官品质的影响[J]. 食品安全导刊, 2022(31): 133-135.
Li S R, Wu C Y, Yang Y Z, et al.Effects of different processing technology on sensory quality of wild white tea[J]. China Food Safety Magazine, 2022(31): 133-135.
[9] 陈兵香. 空气能萎凋房在周宁县白茶加工中的应用——周宁县徐牌茶叶有限公司应用方式[J]. 福建茶叶, 2022, 44(5): 24-26.
Chen B X.Application of air energy withering room in white tea processing in Zhouning County: application mode of Xupai Tea Co., Ltd. in Zhouning County[J]. Tea in Fujian, 2022, 44(5): 24-26.
[10] 曾兴. 清洁化复式萎凋白茶生产线设计及工艺研究[J]. 中国茶叶加工, 2020(1): 26-29.
Zeng X.Design and technology research of a clean complex withering white tea production line[J]. China Tea Processing, 2020(1): 26-29.
[11] 陈键, 王丽丽, 杨军国, 等. 不同萎凋方式工夫红茶工艺与品质的比较[J]. 茶叶学报, 2016, 57(4): 200-204.
Chen J, Wang L L, Yang J G, et al.Effect of varied withering on quality of black tea[J]. Acta Tea Sinica, 2016, 57(4): 200-204.
[12] 林燕萍, 张渤, 张见明, 等. 不同萎凋方式对武夷红茶“金骏眉”品质的影响[J]. 食品研究与开发, 2021, 42(19): 78-85.
Lin Y P, Zhang B, Zhang J M, et al.Effects of different withering methods on the quality of bohea tea “Jinjunmei”[J]. Food Research and Development, 2021, 42(19): 78-85.
[13] 滑金杰, 袁海波, 王伟伟, 等. 萎凋温度对鲜叶主要生化成分和酶活动态变化规律的影响[J]. 茶叶科学, 2015, 35(1): 73-81.
Hua J J, Yuan H B, Wang W W, et al.Effect of withering temperature on dynamic changes of main biochemical components and enzymatic activity of tea fresh leaves[J]. Journal of Tea Science, 2015, 35(1): 73-81.
[14] 周敬涛, 何畅, 李玉川, 等. 萎凋温度对宁红茶品质影响[J]. 蚕桑茶叶通讯, 2021(5): 23-26.
Zhou J T, He C, Li Y C, et al.Effect of withering temperature on the quality of Ninghong tea[J]. Newsletter of Sericulture and Tea, 2021(5): 23-26.
[15] Ye Y, Dong C, Luo F, et al.Effects of withering on the main physical properties of withered tea leaves and the sensory quality of congou black tea[J]. Journal of Texture Studies, 2020, 51(3): 542-553.
[16] 自浩, 钱和. 萎凋工艺对大叶种红茶品质的影响研究[J]. 中国茶叶加工, 2022(2): 48-55.
Zi H, Qian H.Effects of withering technology on the quality of large leaf variety black tea[J]. China Tea Processing, 2022(2): 48-55.
[17] 岳世彦, 周荣荣, 南铁贵, 等. 粉葛与葛根中主要化学成分的含量比较[J]. 中国中药杂志, 2022, 47(10): 2689-2697.
Yue S Y, Zhou R R, Nan T G, et al.Comparison of major chemical components in Puerariae thomsonii Radix and Puerariae lobatae Radix[J]. China Journal of Chinese Materia Medica, 2022, 47(10): 2689-2697.
[18] 滑金杰, 袁海波, 姚月凤, 等. 温度对茶发酵叶色泽及茶色素含量的影响[J]. 农业工程学报, 2018, 34(12): 300-308.
Hua J J, Yuan H B, Yao Y F, et al.Effect of temperature on color and tea pigment content of fermented tea leaves[J]. Transactions of the Chinese Society of Agricultural Engineering, 2018, 34(12): 300-308.
[19] 自浩. 高香红茶萎凋工艺及其品质形成机理研究[D]. 无锡: 江南大学, 2015.
Zi H.Research on deterioration process and quality forming mechanism of black tea with rich flavor [D]. Wuxi: Jiangnan University, 2015.
[20] Ntezimana B, Li Y, He C, et al.Different withering times affect sensory qualities, chemical components, and nutritional characteristics of black tea[J]. Foods, 2021, 10(11): 2627. doi: 10.3390/foods10112627.
[21] 宛晓春. 茶叶生物化学[M]. 3版. 北京: 中国农业出版社, 2003.
Wan X C.Tea biochemistry [M]. 3rd ed. Beijing: China Agriculture Press, 2003.