关于普洱茶的独特陈香,有专业机构曾经通过不同品种的普洱茶原料和制成品香气成分进行定性、定量分析,结果表明:普洱茶的独特陈香与云南大叶种丰富的糖类及其次生代谢产物有关,并显示不同品种原料普洱茶陈香组分有较大差异。乔木型云南大叶种普洱茶芳香油其总量与中小叶种无显著差异,但香气成分组成增加20%,具有樟香及陈香特征的香气等十六个组分含量明显高于中小叶种。而这些组分多数为形成茶叶陈醇甜香及甘醇滋味的重要组成。实验还证明,生长树龄愈长的大茶树,这一类次生代谢物质含量和成分愈丰富。无论是不饱和脂肪酸代谢降解产物还是氨基酸降解产物以及多萜类氧化降解产物,都对普洱茶深沉细腻的香韵产生十分微妙的影响,因此在实践中我们也可以通过普洱茶年份的转化中去印证这种结果。
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