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首页> 外文期刊>Animal Science Journal >Changes in oxidative status in periparturient dairy cows in hot conditions.
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Changes in oxidative status in periparturient dairy cows in hot conditions.

机译：高温条件下围产期奶牛氧化状态的变化。

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摘要

We investigated the changes in the plasma concentrations of oxidative stress markers in periparturient dairy cows in hot conditions. This study was performed on 10 cows from day -5 to day 10 after parturition. The experimental duration was divided into three periods: period 1 (5 days before parturition); period 2 (5 days after parturition); and period 3 (from day 6 to day 10 after parturition). The average rectal temperature in the cows during the experimental period was more than 39 degrees C. Plasma aspartate aminotransferase activities in periods 2 and 3 were higher than that in period 1 (P<0.05). Blood urea nitrogen concentration in period 3 was lower than those in periods 1 and 2 (P<0.05). The total ascorbic acid concentration in the plasma in period 2 was greater than those in periods 1 and 3 (P<0.05). Thiobarbituric acid reactive substances (TBARS) concentrations in periods 2 and 3 were greater than that in period 1 (P<0.05). TBARS concentration was positively correlated with aspartate aminotransferase activity (P<0.05). These results suggested that oxidative stress increased in cows after parturition under hot climatic conditions.
机译：我们研究了高温条件下围产期奶牛血浆中氧化应激标志物浓度的变化。从分娩后的第-5天到第10天，对10头母牛进行了这项研究。实验持续时间分为三个时期：时期1（分娩前5天）;时期1。 2期（分娩后5天）;和第3期（分娩后第6天到第10天）。在实验期间，奶牛的平均直肠温度超过39摄氏度。第2和第3阶段的血浆天冬氨酸转氨酶活性高于第1阶段（ P <0.05）。第三阶段的血液尿素氮浓度低于第一阶段和第二阶段的尿素氮浓度（ P <0.05）。第2阶段血浆中的总抗坏血酸浓度高于第1阶段和第3阶段中的总抗坏血酸浓度（ P <0.05）。第2和第3期的硫代巴比妥酸反应性物质（TBARS）浓度高于第1期的浓度（ P <0.05）。 TBARS浓度与天冬氨酸转氨酶活性呈正相关（ P <0.05）。这些结果表明，在炎热的气候条件下分娩后母牛的氧化应激增加。

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