云茶香1号不同萎凋工艺白茶的化学品质研究

为探明云茶香1号茶树品种不同萎凋处理白茶的香气特征物质。采用一芽二叶鲜叶（YC-R）为原料，室内萎凋（YC-T）和复式萎凋(YC-L)工艺加工白茶，利用感官审评、理化分析、GC-MS技术进行挥发性及非挥发性成分检测。（1）通过生化成分和感官审评分析表明表明云茶香1号加工白茶品质优质，儿茶素与可溶性糖存在差异，室内萎凋儿茶素、可溶性糖含量高，复式萎凋茶多酚、咖啡碱、氨基酸、黄酮含量高，外形得分低，香气得分高。（2）挥发性成分共鉴定出12大类，226种已知挥发性成分，144种显著差异。室内萎凋以果香的物质（E）-2-己酸丁酯、癸醛为主，复复式萎凋含有花香、果香、甜香、嫩香、香料香、蜜香、坚果香的物质较室内萎凋高。本研究不仅为云茶香1号茶树品种开发云南白茶新产品与香气特征成分之间的关系提供一定理论依据，更为云南白茶工艺的创新提供参考价值，促进云南茶产业多样化发展。

Study on the chemical quality of white tea with different withering processes of Camellia sinensis vs Yunchaxiang 1

Objective In order to explore the aroma characteristic substances of white tea with different withering treatments of C.sinensis Var.assamica cv.Yunchaxiang 1 tea tree variety. Method One bud and two fresh leaves (YC-R) were used as raw materials, and white tea was processed by indoor withering (YC-T) and compound withering (YC-L) processes, and volatile and non-volatile components were detected using sensory review, physicochemical analysis and GC-MS techniques. Results (1) The biochemical composition and sensory review analysis showed that the white tea processed by C.sinensis Var.assamica cv.Yunchaxiang 1 was of high quality, with differences in catechins and soluble sugars, high content of indoor withered catechins and soluble sugars, high content of compound withered tea polyphenols, caffeine, amino acids and flavonoids, low appearance score and high aroma score. (2) Volatile components were identified in 12 major categories, 226 known volatile components, 144 significant differences.Conclusion Indoor withering was dominated by the substances of fruit aroma (E)-2-butyl hexanoate and decanal, and compound withering contained higher substances of floral, fruit, sweet, tender, spice, honey and nut aroma than indoor withering. This study not only provides some theoretical basis for the relationship between the development of Yunnan white tea new products and aroma characteristics components of Yuncha Xiang No. 1 tea tree variety, but also provides reference value for the innovation of Yunnan white tea process and promotes the diversification of Yunnan tea industry.