摘要
通过比较4种茶叶主要生物活性物质的含量,了解其营养价值.检测并比较绿茶、红茶、乌龙茶和黑茶中茶多酚、茶氨酸、维生素E、维生素C、铜、锌、硒、锰、钙和镁的含量,使用SPSS 26.0软件进行统计分析.结果显示,茶多酚:绿茶＞红茶,绿茶＞黑茶,乌龙茶＞黑茶(P＜0.05);茶氨酸:绿茶＞红茶,绿茶＞黑茶,乌龙茶＞黑茶(P＜0.05);维生素C:绿茶＞红茶,绿茶＞乌龙茶,绿茶＞黑茶(P＜0.05);维生素E:乌龙茶＞绿茶＞黑茶＞红茶(P＜0.05);铜:绿茶＞乌龙茶,黑茶＞红茶＞乌龙茶(P＜0.05);锌:绿茶＞红茶＞黑茶＞乌龙茶(P＜0.05);硒:乌龙茶＞红茶＞黑茶,乌龙茶＞红茶＞绿茶(P＜0.05);锰:黑茶＞绿茶,乌龙茶＞绿茶(P＜0.05);钙:黑茶＞红茶＞乌龙茶＞绿茶(P＜0.05);镁:黑茶＞乌龙茶＞红茶,黑茶＞绿茶＞红茶(P＜0.05).不同茶叶的生物活性物质含量不尽相同,各有优势,可根据自身健康需求选择合适的茶叶品种.
Abstract
Understand the nutritional value of four teas by comparing their content of major bioactive substances.The con-tent of tea polyphenols,theanine,vitamin E,vitamin C,copper,zinc,selenium,manganese,calcium and magnesium in green,black,oolong and dark teas were detected and compared,the statistical analysis tool was SPSS 26.0.The results show that,Tea polyphenols:green tea＞black tea,green tea＞dark tea,oolong tea＞dark tea(P＜0.05);Theanine:green tea＞black tea,green tea＞dark tea,oolong tea＞black tea(P＜0.05);Vitamin C:green tea＞black tea,green tea＞oolong tea,green tea＞dark tea(P＜0.05);Vitamin E:oolong tea＞green tea＞dark tea＞black tea(P＜0.05);Copper:green tea＞oolong tea,dark tea＞black tea＞oolong tea(P＜0.05);Zinc:green tea＞black tea＞dark tea＞oolong tea(P＜0.05);Selenium:oolong tea＞black tea＞dark tea,oolong tea＞black tea＞green tea(P＜0.05);Manganese:dark tea＞green tea,oolong tea＞green tea(P＜0.05);Calcium:dark tea＞black tea＞oolong tea＞green tea(P＜0.05);Magnesium:dark tea＞oolong tea＞black tea,dark tea＞green tea＞black tea(P＜0.05).Different teas have different contents of bioactive substances and each has its own advantages,so you can choose the right variety of tea ac-cording to your own health needs.
维普
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