关键词: 保靖黄金茶, 海拔, 气象因子, 茶叶品质

Abstract: Using the meteorological data of Baojing Golden village's different altitude meteorological stations from 2016 to 2018,the meteorological conditions and tea quality characteristics of Baojing gold tea growth stages were studied.The results showed that,with increasing altitude,the temperature decreased by 0.3 ℃/100 m,the annual precipitation increased by 106.2 mm/100 m,and the annual sunshine hours were 47 hours/100 m in tea garden valley area.The effective accumulated temperature greater than or equal to 5 ℃ played the role in indication for spring tea harvest time.Baojing gold tea located at an altitude of 360m had the best quality and was superior to other well-known teas.The tea polyphenols was positively correlated with altitude,the effective accumulated temperature greater than or equal to 5 ℃ and the sunshine hours (their correlation coefficients are all 0.98).The ratio of phenol to ammonia was positively correlated with the total precipitation in the first half of the year (the correlation coefficient is 0.94).Caffeine was negatively correlated with altitude,the effective accumulated temperature greater than or equal to 5 ℃ and the sunshine hours (their correlation coefficients are -0.96,-0.96,-0.95,respectively).

Key words: Baojing gold tea, altitude, meteorological factor, tea quality