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茶叶科学 ›› 2018, Vol. 38 ›› Issue (5): 487-495.doi: 10.13305/j.cnki.jts.2018.05.006

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六安瓜片拉老火“起霜”的形成机制及其对茶叶品质的影响

江俞蓉, 刘思彤, 高静, 李大祥, 夏涛, 戴前颖*   

  1. 安徽农业大学茶树生物学及资源利用国家重点实验室,安徽 合肥 230036
  • 收稿日期:2018-01-17 修回日期:2018-04-14 出版日期:2018-10-15 发布日期:2019-10-15
  • 通讯作者: *daiqianying117@163.com
  • 作者简介:江俞蓉,女,硕士,主要从事茶叶审评与品质调控方面的研究。
  • 基金资助:
    国家重点研发计划(2017YFD0400805)、国家自然科学基金(31772057)、安徽省科技重大专项(17030701027)、安徽省科技重大专项(15czz03111)、现代农业产业技术体系建设专项资金(CARS-19)、安徽省现代农业(茶叶)产业技术体系(皖农科[2016]84号文)、茶叶化学与健康领军人才团队引进重大示范项目

The Mechanism of Frost-like Powder and Its Effects on Lu′anguapian Tea Quality

JIANG Yurong, LIU Sitong, GAO Jing, LI Daxiang, XIA Tao, DAI Qianying*   

  1. State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei 230036, China
  • Received:2018-01-17 Revised:2018-04-14 Online:2018-10-15 Published:2019-10-15

摘要: 采用图像扫描技术,结合成对偏爱检验法、茶叶感官审评法以及茶叶理化成分检测,探索了六安瓜片的起霜条件、霜与茶叶品质的相关性,并通过纸片代替茶叶,收集瓜片起霜过程中的“霜”,探索了瓜片霜的化学本质。试验结果表明,拉老火起霜过程中的摩擦因子是起霜的关键;拉老火工艺不仅改善了瓜片的外形,同时对其香气和滋味也产生了有利的影响。成对偏爱试验结果亦表明,评价员更偏爱拉老火起霜的瓜片。经LC-MS和GC-MS初步鉴定,“霜”的化学物质非常复杂,主要由咖啡碱、儿茶素类、黄酮苷类以及萜烯类等多种非挥发性物质和多种挥发性物质组成。

关键词: 绿茶, 六安瓜片, 拉老火, 霜, 品质

Abstract: The precondition of frost-like powder formation of Lu′anguapian tea and the correlation between frost-like powder and tea quality were explored by image technologies, paired preference test and traditional sensory evaluation. To identify the chemical properties of the white frost-like powder, filter paper was used to replace the tea leaves to collect white frost-like powder from the surface of the leaves during the process. The results showed that friction was the key factor for the formation of the frost-like powder. The technologies called “Lalaohuo” could not only improve the appearance of tea but also affect its flavor and taste. Based on LC-MS and GC-MS analysis, the main chemicals of white frost-like powder were very complicated, which included caffeine, catechins, flavonoid glycosides and volatiles such as terpenes.

Key words: green tea, Lu'anguapian tea, Lalaohuo, frostliking powder, tea quality

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