【摘要】 为了解贵州高茶多酚茶树品种的多酚品质状况,根据现有资料,选取贵州高茶多酚茶树品种进行茶叶主要内含成分分析,并对茶多酚、儿茶素组分进行茶多酚逆转阀值、儿茶素品质指数、苦涩味指数分析。结果表明:‘黔湄419’、‘黔湄502’、‘黔湄701’茶多酚含量全年平均含量分别为25.4%、26.5%、25.8%,而‘福鼎大白茶’仅17.6%,比‘福鼎大白茶’高出6.8%、8.2%、7.2%。高茶多酚茶树品种与普栽种‘福鼎大白茶’多酚含量差异显著。EGCG含量与儿茶素总量虽然与‘福鼎大白茶’未产生显著差异,但含量均高于‘福鼎大白茶’,分别高出24.7%、12.5%、17.8%和33.7%、24.3%、23.1%,说明3个高茶多酚茶树品种具有较好的品种优势。茶多酚逆转阀值均在水浸出物的40%~60%之间,制作绿茶具会有较好的品质表现。儿茶素品质指数为3.98、4.49和6.06。儿茶素苦涩味指数9.41、9.24和10.51。综合儿茶素品质指数、苦涩味指数考虑,‘黔湄502’多酚类品质要优于‘黔湄419’、‘黔湄701’。更多还原

【Abstract】 In order to know the polyphenols quality of high content tea varieties in Guizhou Province, based onavailable data, high polyphenols content tea varieties were selected to analyze the main ingredients in tea, aswell as their polyphenols reversed quality index, catechins quality index, catechins bitter taste index ofpolyphenol and catechins. The results showed that the annual average content of polyphenol in‘Qianmei 419’,‘Qianmei 502’and‘Qianmei 701’were 25.4%, 26.5% and 25.8% respectively, which were 6.8%, 8.2%,7.2% higher than that of‘Fudingdabaicha’, whose figure was 17.6%,. The polyphenols difference betweenhigh polyphenols content varieties and common tea variety‘Fudingdabaicha’was significant. Although EGCGand total catechins content were not significantly different between high polyphenols content varieties and‘Fudingdabaicha’, the EGCG of high polyphenols content varieties was 24.7%, 12.5%, 17.8% higher than thatof‘Fudingdabaicha’, while the total catechins content was 33.7%, 24.3%, 23.1% higher than that of‘Fudingdabaicha’. It indicated that these three high polyphenols content tea varieties had some advantages inquality. All polyphenols reversed threshold values of these three high polyphenols content varieties werebetween 40%-60% of water extract, suggesting the green tea production with good quality. Comprehensivelyconsidering the catechin quality index and the astringent index, which were 3.98, 4.49 6.06 and 9.41, 9.24,10.51 of the tree high polyphenols content varieties respectively, the polyphenols quality of‘Qianmei 502 ’was better than that of the other two high polyphenols content tea varieties,‘Qianmei 419’and‘Qianmei 701’.更多还原