古蔺牛皮茶主要生化成分分析及绿茶品质初探

根据植物学特征,将具代表性的四川古蔺牛皮茶茶树分为8种（Ⅰ^Ⅷ）类型,测试了其茶鲜叶中主要生化成分含量,并对所制烘青绿茶品质进行评审。结果表明,古蔺牛皮茶鲜叶中生化成分含量较丰富,游离氨基酸总量为1.73%±0.02%⁴.96%±0.11%,茶多酚含量为19.04%±0.42%³6.57%±0.57%,咖啡碱含量为3.28%±0.03%⁵.22%±0.04%,水浸出物含量为37.46%±0.09%⁴7.79%±0.37%,儿茶素总量为（104.73±4.44）^194.60±8.52mg/g。其中Ⅴ类的咖啡碱含量达5.22%±0.04%,为高咖啡碱材料,同时其茶多酚含量为36.57%±0.57%及EGCG含量为（82.80±1.05）mg,Ⅱ类游离氨基酸总量最高,为4.96%±0.11%为氨基酸含量较高的育种材料,可从中选育功能成分含量较高的茶树品种。结合主要生化成分含量、酚/氨值及儿茶素组分等可推论,Ⅴ类适制红茶,Ⅱ类类制绿茶品质最优。 

Preliminary study on biochemical composition and green tea quality of Gu Lin kraft tea

According to the current resource status and the botanical charactenstic of Gu Lin kraft tea plants, the representative plants were selected and divided as eight types ( from Ⅰ to Ⅷ) . The major biochemical components were determined, and the quality of baked green tea was evaluated. Results show that:To different types of Gu Lin kraft tea are rich of biochemical compositions, free amino acids arranges at 1.73% ±0.02% ⁴.96% ±0.11%, polyphenol content arranges at 19.04% ±0.42% ³6.57% ±0.57%, caffeine content arranges at3.28%±0.03%⁵.22%±0.04%, water extract content arranges at 37.46%±0.09%⁴7.79%±0.37%, total catechins arranges at (104.73±4.44) ⁽194.60±8.52) mg/g. V-Class is materials of high caffeine content for the caffeine content of 5.22%±0.04%, it was higher that its tea polyphenol content was 36.57% ±0.57% and EGCG content was (82.80±1.05) mg, the amino acid of Ⅱ class was 4.96%±0.11% for high amino acid of breeding material, they could be used in the breeding of specific functional ingredients of tea varieties. It could be deduced thatⅤ-Class was appropriate system of black tea and Ⅱ-Class was suitable for green tea according to the contents of major biochemical components and polyphenol/amino acids ratio and catechin components etc.