不同做形方式对湖北条形绿茶品质的影响
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国家重点研发计划(2018YFD0700505); 湖北省水利厅丹江口库区丹江口市茶叶加工提质增效关键技术研究与示范(HBSLKJTG202002)


Effects of shaping methods on quality of strip famous green tea of Hubei Province
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    摘要:

    采用来自湖北宣恩的鄂茶10号嫩芽材料,按照不同的做形方式(烘条、理条、滚条、搓条)和理条叶含水量(含水量40%、37%、33%、30%)加工成干茶,采用感官评价和理化测定对茶叶的外形和主要成分进行分析,探究不同做形方式对茶叶品质的影响,从而得出条形名优绿茶的最适做形方式。结果显示,不同做形方式影响茶叶形状品质,理条与搓条做形评分都显著高于烘条和滚条做形处理,不同做形方式对干茶和茶汤色泽影响显著。综合各项因素,理条做形外形条索紧结优美,综合品质最好。随着理条叶含水量的降低,茶叶条索变得紧直,香气浓度提高,但干茶和叶底绿色度和润度明显下降,色泽变暗;叶绿素总量和叶绿素a含量显著下降,氨基酸含量增加,茶多酚、可溶性糖和叶绿素b含量变化不明显。综合感官评价和理化指标分析,理条做形以理条后叶子含水量在33%~37%为宜。

    Abstract:

    Tender buds of E’cha NO.10 from Xuanen County,Hubei Province were processed into dry tea according to different shaping methods including baking,carding,rolling and rubbing and carding leaves with different moisture content of 40%,37%,33% and 30%. The tea quality including appearance and components of main liquor quality was analyzed by sensory evaluation and physical-chemical test to study the effects of shaping methods on the tea quality and obtain the optimal shaping method of strip famous green tea. Results showed that the shape quality of tea was affected by different shaping methods. The scores of carding and rubbing were significantly higher than that of baking and rolling. Different shaping methods had important effects on the color of dry tea and tea soup. Taking various factors into consideration,the shape of tea by carding was tight and beautiful,and the overall quality was the best. With the decrease of moisture content of carding leaves,the strip of tea became tighter and the aroma concentration became higher. However,the green and luster of the dry tea and infused leaves decreased obviously,and the color became darker. The contents of total chlorophyll and chlorophyll a decreased significantly,while the contents of amino acids increased. The contents of tea polyphenols,soluble sugar and chlorophyll b did not change significantly. Combined with tea sensory evaluation and physicochemical index,the leaves with moisture content of 33%-37% after carding were the best.

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邱安冬,武世华,陈玉琼,余志,张德,倪德江.不同做形方式对湖北条形绿茶品质的影响[J].华中农业大学学报,2021,40(6):195-202

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  • 收稿日期:2021-07-21
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  • 在线发布日期: 2021-11-30
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