野生古茶树茶与茶园茶的比较研究

采用感官审评和化学分析手段,对野生古茶树茶和茶园茶的外形、颜色、滋味、香气等进行审评、测定和比较。两者都为条索,在颜色方面,野生古茶树茶的干品偏向红黄,汤色黄红,茶园茶的干品呈绿黑,茶汤绿黄色;滋味方面,野生古茶树茶苦涩味较淡,醇和,回甘,茶园茶苦涩味比之更盛,味微短,入口略甜。茶多酚、黄酮类化合物两者基本一样,分别是28.9%左右和7%左右,测定的5种儿茶素,茶园茶是野生古茶树茶的两倍多,咖啡碱茶园茶是野生古茶树茶的约两倍,游离氨基酸野生古茶树茶比茶园茶高,可溶性糖野生古茶树茶(3.82%)比茶园茶(4.60%)低;在香气化合物方面,野生古茶树茶测出定名的香气化合物有58个,茶园茶有74个,两者相同的香气化合物有12个。野生古茶树茶泡饮比茶园茶优越很多,儿茶素类、香气化合物对人体的作用有待进一步研究。

A comparative study between wild ancient tea and tea garden tea

The appearance,liquor color,taste and aroma of wild ancient tea and tea garden tea were evaluated and determined by sensory evaluation and chemical analysis method.Both of the appearances were stripy.The color of dried wild ancient tea was red-yellow and liquor color is yellow-red,while the dried tea garden tea was green-black and liquor color was green-yellow.The wild ancient tea tasted soft,sweet,and a little bitter,while the tea garden tea was much bitter and slightly sweet at the beginning.The contents of tea polyphenols and flavonoid compounds of both were the same,which were about 28.9% and 7%.The five kinds of catechins which were determined in wild ancient tea were two times more of that in tea garden tea.The tea garden tea’s caffeine content was nearly two times more than wild ancient tea.The content of free amino acids(AAs) in wild ancient tea was higher,while the tea garden tea had a higher content(4.60%) than wild ancient tea(3.82%) in soluble sugar.Fifty-eight kinds of aroma compounds were measured in wild ancient tea and 74 kinds of aroma compounds in tea garden tea,and there were 12 common components in both.In all,the wild ancient tea was far superior to the tea garden tea,but the effects of catechins and aroma compounds on the human body needed to be further studied.