期刊论文

中文

茶叶通讯

1009-525X

2016

43

2

19-23

10.3969/j.issn.1009-525X.2016.02.005

湖南省教育厅科学研究重点项目（13A034）；

本校为第一机构

以适制红茶茶树品种政和大白茶春季一芽二叶新梢为原料,通过分析其红条茶加工中多酚氧化酶（PPO）、过氧化物酶（POD）酶活性及其比值,探讨儿茶素组分与茶黄素组分动态变化。结果表明,萎凋期间,PPO、POD酶活性在萎凋末期达到最大值,儿茶素总量小幅下降,茶黄素组分TF小幅上升,PPO/POD比值从0.78下降到0.33;揉捻阶段,儿茶素组分含量下降加快,ECG、GCG、EC下降幅度较大,茶黄素组分快速上升,且TFDG增幅最大,PPO/POD比值降至0.28;发酵期间,儿茶素组分含量下降较揉捻时慢,茶黄素组分及总量在发酵4 h时达到最大值,PPO/POD比值在发酵3 h时下降至最小值0.27,此后上升;干燥阶段,儿茶素组分含量略减,其中EG...

By using one bud two leaves spring leaves of Political and white tea which was suitable for Black tea processing as material, the enzyme activity and its ratio of PPO and POD during processing of black tea were analy to discusses the catechins components and thealfavin components dynamic mechanism. The results indicated that in withering process PPO and POD enzyme activity reach to the maximum in the withering stage ,after the continued decline, catechins decreased slightly, thealfavins component TF to rise slightly, PPO/POD ratio decreased from 0.78 to 0.33;In rolling process, catechin conten...