不同季节翠玉品种3大茶类生化成分及抗氧化活性研究

Research on the Chemical Components and the Antioxidant Activities of Cuiyu Green Tea,Oolong Tea and Black Tea in Spring,Summer and Autumn

对不同季节(春、夏、秋)翠玉品种3大茶类(绿茶、乌龙茶和红茶)的生化成分含量及抗氧化能力进行分析研究。结果表明:不同季节翠玉绿茶中,夏茶的抗氧化能力最强,其茶多酚、儿茶素总量较春茶低,但酯型儿茶素的含量为最高;不同季节翠玉乌龙茶中,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均为最高,其茶多糖的含量也较绿茶和红茶夏茶高;不同季节翠玉红茶的抗氧化能力差异不大。从不同茶类来看,翠玉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 Cuiyu green tea, oolong tea and black tea in summer, spring and autumn were determined. The results showed that Cuiyu green tea in summer showed the strongest antioxidant ability. The content of tea polyphenols and catechins of Cuiyu green tea in summer were lower than that in spring, however, its esters-catechin was the highest among all the green tea in different sea-sons. The antioxidant ability of Cuiyu oolong tea in summer was strongest in different seasons. The content of tea polyphenols, catechins and esters-catechin of Cuiyu oolong tea in summer were also the highest among all the oolong tea in different seasons. Moreover, it contained the highest concentration of tea polysaccharide among all the teas in summer. There was no significant difference in the antioxidant activities of Cuiyu black tea in differ-ent seasons. For the different types of teas, Cuiyu green tea had the strongest antioxidant ability, followed by oo-long tea and black tea.