贵州地方茶树资源的生化成分多样性及绿茶品质

Biochemical Components Diversity and the Quality of Green Tea on Local Tea Germplasm Resources in Guizhou

通过理化检测和茶叶感官审评,对贵州地方茶树资源的生化成分和绿茶品质进行了研究。结果表明,贵州地方茶树资源水浸出物含量40.7%～48.7%(平均45.0%),氨基酸2.9%～4.4%(平均3.3%),茶多酚21.0%～38.2%(平均32.6%),酚氨比6.4～12.3(平均10.0),咖啡碱2.5%～3.2%(平均2.8%),儿茶素总量13.54%～17.07%(平均14.77%),儿茶素品质指数2.12～3.62(平均2.80)。GT-02资源的氨基酸含量超过福鼎大白茶,GT-01和GT-02的酚氨比低于福鼎大白茶,GT-07、GT-08、GT-09和GT-10的儿茶素总量和儿茶素品质指数大于或接近福鼎大白茶,GT-12、GT-13和GT-14资源的绿茶感官品质总分超过或接近福鼎大白茶,提示以上资源的绿茶品质优良。另外,GT-10资源群体的EGCG含量较高,达8.66%,具有开发价值。

Biochemical components diversity and quality of green tea about local tea germplasm resources in Guizhou were studied by physical and chemical inspecting or tea sensory testing.The results showed that the content of water extract is 40.7%-48.7%（average 45.0%）,amnio acids 2.9%-4.4%（average 3.3%）, polyphenols 21.0%-38.2%（average 32.6%）,polyphenols/amnio acids 6.4-12.3（average 10.0）, caffeine2.5%-3.2%（average 2.8%）,total catechin 13.54%-17.07%（average 14.77%）,catechin guality index 2.12-3.62（average 2.80）.Amnio acids content in GT - 02 is higher than Fu Ding Da Bai Cha,polyphenols/ amnio acids in GT - 01and GT - 02 are lower than Fu Ding Da Bai Cha,totol catechin and catechin guality index in GT - 07,GT - 08,GT - 09 and GT - 10 are higher than or close to Fu Ding Da Bai Cha,the scores of green tea sensory quality of GT-12,GT - 13 and GT - 14 are higher than or close to Fu Ding Da Bai Cha,the results indicated that these resources have a good green tea quality.Beside this,GT - 10 tea population resource showed higher EGCG content as 8.66%than other resources,it is worth developing.