维生素A对海南和牛抗氧化指标及血液生化指标的影响

Influence of the Levels of Vitamin A on Blood Biochemical Parameters and Sersum Antioxidant Indexes of Hainan-Japanese Cattles

试验在海南和牛日粮中添加不同水平的维生素A,研究其对海南和牛血液生化指标和抗氧化性的影响。选体重和胎次相近的海南和牛12头,随机分为4个处理组,每个处理组设3个重复,每个重复1头牛,对照组饲喂干稻草基础日粮,试验组在对照组日粮基础上分别添加2500、5000、7500IU/kg维生素A,试验期为40d。结果表明:①维生素A的添加水平对海南和牛的血清抗氧化性指标的影响差异不显著(P>0.05),但随着日粮中维生素A添加水平的提高,海南和牛的血清抗氧化能力逐渐增强;②维生素A的添加水平可显著提高血液中葡萄糖的含量(P<0.05),同时随着维生素A添加水平的提高还可以提高血液中一些关键酶的活性(P>0.05)。因此,日粮中添加维生素A可以提高海南和牛血液中一些关键酶的活性和血清的抗氧化能力,并以添加7500IU/kg组效果最好。

This experiment was undertaken to investigate the effects of vitamin A levels on serum antioxidant indexes and blood biochemical indexes of Hainan-Japanese cattles.Twelve Hainan-Japanese cattles with average initial weight of（148.17±15.52） kg and the same genetic backgrounds were randomly divided into four treatments.Cattles were fed on white corn-soybean basal diet as the control group,the experimental groups were fed on additional 2500,5000,7500 IU/kg vitamin A into their own variations and basic feedstuff.The trial lasted for 40 days.The results showed that the levels of vitamin A had no significant infuence on serum antioxidant indexes of Hainan-Japanese cattles（P〈0.05）,but the vitamin A levels could increase the content of SOD and T-AOC in serum;the supplementation of vitamin A significantly increased the levels of glucose in blood（P〈0.05）,and some of the key enzymes activity increased too（P〈0.05）.In conclusion,some key enzyme activity in blood and serum antioxidant capacity could be improved by increasing the vitamin A levels in diets,the supplementation of vitamin A 7500 IU/kg was the best.