摘要
为了解湘西州域内“黄金茶”的品质特征,对选取域内8县(市)77份“黄金茶”绿茶样分别进行理化检测和感官审评。结果显示,湘西州域内“黄金茶”绿茶具有“香、绿、鲜、醇”的特征品质,‘保靖黄金茶1号’绿茶水浸出物、茶多酚、游离氨基酸、咖啡碱含量平均值分别为40.03%、18.70%、5.34%和3.52%,‘黄金茶2号’绿茶水浸出物、茶多酚、游离氨基酸、咖啡碱平均值分别为39.76%、17.93%、5.69%和3.95%;“黄金茶”的酚氨比主要集中在2.5~4.0,且酚氨比≤3.0时品质最优;儿茶素含量为7.72%~15.76%,儿茶素品质指数3.44~14.59,儿茶素品质指数≥7.0时品质较好;18种氨基酸总含量为2.19%~6.05%,其中茶氨酸含量最高可达2.59%。以高氨基酸、低酚氨比、合适的儿茶素品质指数为具体表现的内含物质综合作用形成了湘西“黄金茶”特征品质。
The golden tea has been widely planted in Xiangxi Prefecture,showing a very effective of getting rid in battle against poverty,For comprehensive response the characteristic quality of Huangjin Green Tea,77 tea samples from 8 counties and cities in Xiangxi prefecture were selected to study the relationship of characteristic quality,main biochemical components.The results showed that the characteristic quality of Xiangxi Huangjin Green Tea"fragrant,green,fresh and mellow".the average values of the extracts,tea polyphenols,free amino acids,and caffeine of Baojing Huangjin Tea No.1 were 40.03%,18.70%,5.34%,and 3.52%,respectively.The extracts,The average values of Huangjin Tea No.2 are 39.76%,17.93%,5.69%,and 3.95%,respectively.The main phenol-ammonia ratio of Huangjin Tea ranges from 2.5 to 4.0,and the quality is optimal when less than or equal to 3.0;the catechin content ranges from 7.72%to 15.76%,the catechin quality index was 3.44~14.59,and the quality was better when the index was≥7.0;the total content of 18 amino acids was 2.19%~6.05%,of which highest was 2.59%.The reasonable proportion of contained substances characterized by high amino acid,low phenol-to-ammonia ratio and suitable catechin quality index jointly formed the characteristic quality.
作者
秦廷发
杨雪华
易强
张黎琼
田少叶
徐志雄
黄建安
黄纯勇
包小村
QIN Tingfa;YANG Xuehua;YI Qiang;ZHANG Liqiong;TIAN Shaoye;XU Zhixiong;HUANG Jian'an;HUANG Chunyong;BAO Xiaocun(Xiangxi Tea Industry Development Center,Jishou 416000,China;Xiangxi Agricultural Characteristic Industry Service Center,Jishou 416000,China;Tea Industry Research Institute of Xiangnong University in Xiangxi Prefecture,Huayuan 416400,China;Hunan Agricultural University,Changsha 410128,China;Tea Research Institute of Hunan Academy of Agricultural Sciences,Changsha 410125,China)
出处
《茶叶通讯》
2023年第2期201-208,共8页
Journal of Tea Communication
基金
院士茶产业联合研究院建设第三期项目
湖南省农业科技创新资金项目(2020CX34)
湘西自治州人才发展专项
湘西州科技计划2021年区域创新能力建设项目
中央引导地方科技发展专项(2021QZY035、2021QZY036)
湘西州技术攻关“揭榜挂帅”项目。
关键词
黄金茶
特征品质
氨基酸
湘西
Huangjin Tea
Characteristic quality
Amino acids
Xiangxi