以晒青毛茶及不同渥堆程度普洱茶饲喂实验小鼠,研究小鼠肝组织抗氧化酶活性变化规律。结果表明,各处理小鼠,其肝组织抑制羟自由基能力、SOD活力、GSH-PX活力变化规律基本一致,各饲喂茶样组以上三指标均远远高于对照（基础饲料饲喂）,并以晒青毛茶处理组最高,随饲喂茶样渥堆程度增加,以上三指标逐渐降低。各处理小鼠肝组织MDA含量与其SOD活力高度负相关,相关系数r=-0.942;晒青毛茶处理组SOD活力最强,MDA含量最低;与对照相比,各茶样处理组MDA含量均极显著下降（P<0.01）。各茶样处理小鼠肝组织中CAT活力均高于对照组,除第4次翻堆样处理外,其他处理与对照之间差异达显著水平（P<0.05）。各茶样处理组T-AOC均极显著高于对照组（P<0.01）,以晒青毛茶处理组最强,随着渥堆程度增加,T-AOC呈下降趋势。研究结果说明,普洱茶渥堆发酵工序对其抗氧化作用有重要的影响。

Antioxidative enzymes activity in the livers of the mice fed with the sun-dried green tea and the Pu-erh tea with different pile-fermentation degree were studied. Results were as follows: compared with the control group (basic feed group), the hydroxyl radical-scavenging activity, glutathione peroxidase (GSH-PX) activity and superoxide dismutase (SOD) activity in the livers of the mice fed with different tea samples were significantly increased(P<0.01), but decreased with the extents of pile-fermentation degree of Pu-erh tea increasing. This increase was the highest in the sun-dried green tea treatment. Of all the treatments, there was a significant negative correlation between the maleic dialdehyde (MDA) content and the SOD activity and the correlative coefficient was -0.942. The SOD activity was the highest while the MDA content was the lowest in the sun-dried green tea treatment (P<0.01). The MDA content of other treatments were highly decreased when compared with that of the control (P<0.01). Compared with the control, catalaes (CAT) activity were highly increased except that of the fourth pile-fermentation tea treatment (P<0.01). As to the total anti-oxidation capacity (T-AOC), it was significantly increased compared with that of the control (P<0.01), but decreased with the extents of pile-fermentation degree increasing. The sun-dried green tea treatment exhibited the strongest T-AOC (P<0.01). The study showed that the pile-fermentation process exerted significant effects on the antioxidative activity of Pu-erh tea.