不同采摘期崂山绿茶主要品质化学因子构成及变化研究

Component and its Change of Chemical Quality Factors of Laoshan Green Tea in Different Picking Period

通过测定崂山茶区不同采摘期茶叶样品的水浸出物、茶多酚、氨基酸、咖啡碱的含量,分析不同采摘期茶叶品质构成因子的变化动态。结果表明:在不同的土壤养分水平下,崂山绿茶主要品质成分含量因不同的采摘期而存在极显著差异,水浸出物含量表现为夏季>春季>秋季;茶多酚含量春茶明显低于夏秋茶;咖啡碱含量在三类茶园中差异均显著,夏茶含量略低于春秋两季;氨基酸含量也存在极显著差异,春茶含量明显高于夏秋茶,秋茶略高于夏茶;酚氨比变化极显著,春茶明显低于夏秋茶,品质最好。为茶园土壤养分及生态环境调控与崂山绿茶分级提供了重要依据。

Tea samples which were sampled from Laoshan tea gardens in different picking period were tested. The content of water extracts, tea polyphenols, amino acid and caffeine of those samples and the seasonal variation trend of chemical quality component were analyzed. The results showed that the chemical quality component of tea samples from different seasons varied significant. The water extracts content of different season tea were proved to be： summer tea 〉 spring tea 〉 autumn tea. The tea polyphenols content of spring tea was lower than that of other sea- sons tea. The caffeine content was varied significant, in which the content of summer tea was lowest. The amino acid content of spring tea was tested to be highest among different season tea and its ratio of tea polyphenols against amino acid were lowest. As a summary, the quality of spring tea was better than the quality of autumn tea and summer tea. The soil nutrient and tea garden environment could be eontroled and the quality of tea could be classified, using for reference to planting and processing of tea.