Effects of Jade screen powder on serum antioxidant index and _performance of fattening bullocks | 玉屏风散对育肥阉牛血清抗氧化指标及生产性能的影响

Chinese. 研究玉屏风散对育肥阉牛血清抗氧化指标及生产性能的影响。选用健康无病、体质量相近、40月龄左右的“利×鲁”杂交一代育肥阉牛36头，随机分为4组，分别按精料质量的0.0%，1.0%，1.5%和2.0%_添加玉屏风散，饲喂60 d，每20 d称体质量、采血1次，并记录每天的采食量和最高环境温度。玉屏风散可以显著提高育肥阉牛血清总抗氧化能力（T-AOC）以及谷胱甘肽过氧化物酶（GSH-PX）、超氧化物歧化酶（SOD）、过氧化氢酶（CAT）活性（P0.05）,显著降低阉牛血清中丙二醛（MDA）含量（P0.05），从而防止因环境温度升高而引发的氧化应激。T-AOC、 CAT、GSH-PX、SOD的活性相互呈强正相关（P0.01），且皆与MDA含量呈负相关。玉屏风散可提高阉牛的日增体质量、胴体质量和屠宰率，降低干物质料质量比，且以1.5%添加量效果最佳。玉屏风散可以显著提高育肥阉牛血清抗氧化能力，并有一定的育肥效果。

English. This experiment was conducted to study the effects of Jade screen powder on serum antioxidant index and performance of fattening bullocks. 36 fattening bullocks (Limousin cattle×Luxi cattle) which were healthy, had similar age and weight, were divided into four groups at random. The four treatments were added with jade screen powder (0.0%, 1.0%, 1.5%, 2.0% per concentrate cattle feed). All bullocks were weighed and the blood samples were obtained one time every 20 days in the trial. In addition, the highest ambient temperature was recorded everyday. The results demonstrated that the addition of Jade screen powder can improve the activities of serum total antioxidative capacity (T-AOC), glutathione peroxidase (GSH-PX), superoxide dismutase (SOD), catalase (CAT) significantly (P0.05). Jade screen powder can also decrease the content of MDA and prevent the oxidative stress induced by high ambient temperature. The activities of T-AOC, CAT, GSH-PX, SOD, were positively correlated with each other (P0.01), and they were all negatively correlated with the content of MDA. The addition of Jade screen powder can also improve ADG, carcass weight, slaughter rate and lower the G∶F of fattening bullocks. The addition of 1.5% Jade screen powder had the best effect, but the result was not significant (P0.05). These results indicated that the addition of Jade screen powder can improve the serum antioxidant capacity of fattening bullocts significantly, and can also improve the performance of fattening bullocks.