不同包装材料对正山小种红茶贮藏品质的影响  

Effects of different packaging materials on the qualities of Lapsang Souchong black tea during storage

作　　者：刘亚文 于飞 陈聪 严斯惟 吕杨俊 朱跃进[2] 孔俊豪[2] 杨秀芳[2] 吴媛媛[1] 何普明 屠幼英[1] 李博[1] LIU Yawen;YU Fei;CHEN Cong;YAN Siwei;LÜ Yangjun;ZHU Yuejin;KONG Junhao;YANG Xiufang;WU Yuanyuan;HE Puming;TU Youying;LI Bo(Institute of Tea Research,College of Agriculture and Biotechnology,Zhejiang University,Hangzhou 310058,China;Hangzhou Tea Research Institute,All China Federation of Supply and Marketing Cooperatives,Hangzhou 310016,China)

机构地区：[1]浙江大学农业与生物技术学院茶叶研究所,杭州310058 [2]中华全国供销合作总社杭州茶叶研究院,杭州310016

出　　处：《浙江大学学报（农业与生命科学版）》2021年第1期60-73,共14页Journal of Zhejiang University:Agriculture and Life Sciences

基　　金：“十三五”国家重点研发计划(2017YFD0400804);福建省科技厅科技创新平台项目(2018N2004)。

摘　　要：为探明常用茶叶包装材料铝箔袋、牛皮纸袋、铝箔牛皮纸复合袋、玉米纤维袋对正山小种红茶贮藏保质的效果,采用40℃恒温贮藏8周,分别于1、2、4、6、8周取样,对样品进行感官审评,并对茶叶含水量、茶多酚、可溶性蛋白、游离氨基酸、汤色色度和香气成分进行比较分析。在贮藏末期采用正交偏最小二乘判别分析(orthogonal partial least squares-discriminant analysis,OPLS-DA)详细比较不同包装材料对香气成分的影响。结果表明:4种包装材料对阻止正山小种的含水量上升,茶多酚、可溶性蛋白和游离氨基酸含量下降以及汤色的变化有一定的作用,铝箔牛皮纸复合袋的保存效果最佳,其次为铝箔袋和牛皮纸袋,玉米纤维材料的保存效果最差。相对于无包装对照茶样,包装材料对上述指标具有一定的保护作用。包装材料对正山小种香气的保留效果较为明显,感官审评和OPLS-DA结果都表明铝箔牛皮纸复合袋在4种包装中效果最优。香气感官评分存在先升高后降低的现象,但最高分在不同包装材料中出现的时间点不同。本研究结果表明,在所用40℃恒温贮藏模型中,所选4种常用红茶包装材料都无法有效减缓正山小种在贮藏过程中的整体品质劣变。因此,采用其他保鲜措施对提高正山小种等工夫红茶的贮藏效果非常必要。Aiming to explore the effects of four commonly used tea packaging materials,including aluminum foil bag,kraft paper bag,aluminum foil-kraft paper bag,and corn fiber bag,on the qualities of Lapsang Souchong black tea during storage,samples were stored at 40℃for eight weeks,and were taken for sensory evaluation and determination of contents of water,tea polyphenols,soluble proteins,free amino acids,and infusion color and aroma at the 1,2,4,6 and 8 weeks.Orthogonal partial least squares-discriminant analysis(OPLS-DA)was used to compare the effects of different packaging materials on aroma components in detail.The results showed that the four kinds of packaging materials had effects on preventing the increase of water content and decrease of tea polyphenol,soluble protein and free amino acid contents.Aluminum foil-kraft paper bag had the best effect on the sample storage quality,and aluminum foil and kraft paper bags had similar effects,and corn fiber bag had the worst effect.However,compared with the unpackaged control tea samples,the protective effects of packaging materials on the above indicators were relatively limited.The packaging materials had obvious influence on aroma retention,and the aluminum foil-kraft paper had the best effect.The aroma sensory score increased first and then decreased,and the optimal aroma sensory of tea in four packaging materials appeared at different time points.This study showed that none of the four commonly used black tea packaging materials could effectively slow down the overall quality deterioration of Lapsang Souchong black tea in this storage model.It’s necessary to use some fresh-keeping measures for the preservation of Kungfu black tea as green tea and oolong tea.

关 键 词：正山小种红茶 包装材料 贮藏 品质 

分 类 号：S571.1[农业科学—茶叶生产加工]