摘要
通过对云南大叶种鲜叶进行不同光质萎凋处理,以找出最优加工工艺,为进一步研究大叶种白茶提供理论依据。以云南大叶种长叶白毫为试验对象,采用蓝光和黄光2种光质萎凋,对茶样进行感官品质、生化成分以及香气成分的检测与分析。结果表明,经过2种光质处理后,感官审评总分均高于对照(室内自然凋萎),综合分数从高到低分别为黄光、蓝光、对照,得分分别为92.5、91.8、89.2。经过2种光质处理的茶叶感官品质优于对照,其中黄光优于蓝光。经过2种光质处理的云南大叶种白茶品质得到明显提高,与对照相比,黄光萎凋显著提高了云南大叶种白茶氨基酸、咖啡碱、可溶性糖的含量(P<0.05),蓝光次之,对照最低;与对照相比,2种光质处理均提高了水浸出物含量,蓝光提高幅度大于黄光;2种光质处理均降低了茶多酚含量,蓝光降低幅度大于黄光。试验茶样共鉴定出93种香气组分,其中对照58种,蓝光萎凋57种,黄光萎凋55种。黄光萎凋、蓝光萎凋和室内自然萎凋的茶样芳樟醇相对含量分别为65.43%、62.70%、61.36%。不同光质萎凋有助于云南大叶种白茶品质的提升,其中黄光优于蓝光。处理过的茶样香气、滋味等均比常规加工工艺有较大的改善,是加工云南大叶种优质白茶的方法。
In order to find out the best processing technology,the fresh leaves of Yunnan large-leaf variety were treated with different light quality,which provided a theoretical basis for further study of large-leaf variety white tea.The long-leaf pekoe of Yunnan largeleaf variety was used as the experimental object,two kinds of light quality were used for withering,the sensory quality,biochemical components and aroma components of the samples were detected and analyzed.The results showed that after two kinds of light quality treatment,the total score of sensory evaluation was higher than that of CK(conventional indoor natural sunlight withering),and the comprehensive score from high to low was yellow light,blue light and CK,and the scores were 92.5,91.8 and 89.2,respectively.The sensory quality of tea treated with two kinds of light was better than CK,and yellow light was better than blue light.The quality of white tea treated with two light qualities was significantly improved.Yellow light withering significantly increased the content of amino acids,caffeine and soluble sugars of large-leaf white tea in Yunnan(P<0.05),followed by blue light and the lowest was the control(CK).Compared with the control,two kinds of light quality treatment increased the content of water extract,and the increase of blue light was greater than that of yellow light;the polyphenol content of tea was reduced by two kinds of light quality treatment,and the reduction of blue light was greater than that of yellow light.A total of 93 aroma components were identified in the test tea samples,including 58 CK,57 blue light withering and 55 yellow light withering.The content of tea-like linalool with yellow light withering,blue light withering and conventional indoor natural sunlight withering was 65.43%,62.70% and 61.36%,respectively.The withering with different light quality was beneficial to the improvement of the quality of white tea,and yellow light was better than blue light.Because the aroma and taste of the processed tea were greatly improved,it
作者
张艳梅
仝佳音
郝连奇
杨方慧
赵碧
汤海昆
马玉青
夏丽飞
孙云南
浦绍柳
ZHANG Yan-mei;TONG Jia-yin;HAO Lian-qi;YANG Fang-hui;ZHAO Bi;TANG Hai-kun;MA Yu-qing;XIA Li-fei;SUN Yun-nan;PU Shao-liu(Tea Research Institute,Yunnan Academy of Agricultural Sciences/Yunnan Provincial Key Laboratory of Tea Science,Menghai 666201,Yunnan,China;Beijing Xiaoguantea Co.,Ltd.,Beijing 100020,China)
出处
《湖北农业科学》
2024年第6期99-104,共6页
Hubei Agricultural Sciences
基金
世界大叶茶技术创新中心建设及成果产业化项目(202102AE090038)
绿色食品牌打造科技支撑行动(茶叶)专项经费实施方案项目,普洱茶优良品种选育及应用项目(202002AE320001)
云南省茶学重点实验室培育专项(2017DG011)
云南省茶学重点实验室开放基金项目(2022YNCX004)
云南省基础研究专项-青年项目(202301AU070129)
云南省农业联合专项-面上项目(202301BD070001-212)
云南省勐海县勐满镇西定乡科技特派队项目(202304BI090032-27)。
关键词
云南大叶种白茶
光质
萎凋
large-leaf white tea
light quality
wilting
