金萱品种夏暑茶类的生化成分分析及其抗氧化活性研究

Research of the chemical components and the antioxidant activities of Jinxuan green tea,oolong tea and black tea in summer

本文对金萱品种不同茶类的夏茶与春茶、秋茶的生化成分含量及抗氧化能力进行了分析研究。结果表明:不同季节金萱绿茶中,夏茶的抗氧化能力最强,其茶多酚、儿茶素和酯型儿茶素的含量也最高;不同季节金萱乌龙茶中,夏茶的抗氧化能力最强,与金萱绿茶春茶的抗氧化能力相当,仅次于抗氧化能力最强的金萱绿茶夏茶,其茶多酚、儿茶素和酯型儿茶素的含量较低,茶多糖的含量则明显高于春茶和秋茶;不同季节金萱红茶的抗氧化能力差异不大。从不同茶类来看,金萱品种的茶叶的抗氧化能力表现为绿茶>乌龙茶>红茶。

The chemical components and the antioxidant activities of Jinxuan green tea,oolong tea and black tea in summer,spring and autumn were determined in this article.The results showed that Jinxuan green tea in summer showed the strongest antioxidant ability,followed by spring tea and autumn tea. The content of tea polyphenols,catechins and esters- catechin of Jinxuan green tea in summer were also the highest among all the green tea in different seasons.The antioxidant ability of Jinxuan oolong tea in summer was strongest in different seasons and was very closed to that of Jinxuan green tea in spring,next only to Jinxuan green tea in summer.although Jinxuan oolong tea in summer contained lower tea polyphenols,catechins and esters- catechin than oolong teas in other seasons,it contained the highest concentration of tea polysaccharide. There was no significant difference in the antioxidant activities of Jinxuan black tea in different seasons.For the different types of teas,Jinxuan green tea had the strongest antioxidant ability,followed by oolong tea and black tea.