提高夏秋绿茶品质技术研究

在夏秋季节,通过采用对茶树遮荫处理、改进加工工艺、运用轻修剪调控夏、秋季茶叶产量比例等技术措施提高秋茶产量,实现夏秋茶增值增效.结果表明,遮荫可降低夏秋茶多酚含量,较对照最大降幅为20.56%,增加叶绿素含量,较对照最大增幅为50.93%,酚氨比值降低;长时间鲜叶摊放可提高夏茶水浸出物、茶多酚、氨基酸含量,氨基酸增幅可达11.80%;新工艺加工的秋茶水浸出物、茶多酚、氨基酸、叶绿素含量增幅分别为9.15%、9.89%、8.84%和0.83%,夏秋茶感官品质得到提升.修剪调控可提高夏秋绿茶中的秋茶比例,使秋茶增加19.10%.

On improvement of Summer and Autumn green tea's quality

In order to improve quality of Summer and Autumn green tea, shading and new process were used, results showed the tea polyphenol concentration in tea leaves decreased, with the maximum amplitude of 20.56%, ratio value of tea polyphenol and amino acid concentration decreased, chlorophyll concentration increased, maximum amplitude reached 50.93%. The aroma of Summer and Autumn green tea was also improved. Tea water extracting material, tea polyphenols, amino acids concentration increased, amino acids concentration increase range reached 11.80%, and sensory quality of tea enhanced after long time installing. Tea water extracting material, tea polyphenols, amino acids and chlorophyll concentration increase respectively 9.15%, 9.89%, 8.84% and 0.83%, the sensory quality of Autumn enhanced a lot when the new process was accepted. Autumn green tea's yield increased 19.10% after pruning in Summer.