有机硒对仔獭兔生长性能和组织抗氧化能力的影响

选择80只60日龄的法系獭兔研究酵母硒对生长性能和组织抗氧化能力及GSH-Px mRNA表达丰度的影响。随机分为4个处理组,对照组、硒添加组(1～3)的饲粮是在基础日粮中分别添加0、0.1、0.3、0.5 mg/kg酵母硒,试验期30 d。结果表明:硒添加2组与3组的饲料增重比分别降低12.86%与9.02%,而皮张面积却分别增加11.30%与11.97%(P<0.05);在血浆中,添加2组与3组的GSH-Px活性与CAT活性均极显著升高(P<0.01);在肝组织中,添加1组的GSH-Px活性与CAT活性显著升高(P<0.05),而添加2组的MDA含量降低得最多;在肌肉组织中,添加1～3组的GSH-Px活性分别显著升高17.66%、57.91%与65.02%(P<0.05);肝与背最长肌的GSH-Px mRNA表达水平随酵母硒添加水平升高而升高(P<0.01)。综合分析表明,仔獭兔饲粮中添加酵母硒的最适量为0.3 mg/kg。

Effects of Organic Selenium Sources on Growth Performance and Antioxidant Capability in Young Rex Rabbits

The experiment was conducted to investigate the effect of diet supplemented with Organic Selenium(Selenium yeast)on growth performance,and tissue antioxidant capacity and GSH-Px mRNA expression.Eighty 60-day-age young Rex rabbits(half male and half female)were fed either a commercial diet(control group)or a Se-supplemented diet containing 0.1,0.3 and 0.5mg/kg Selenium yeast(3 adding groups)for 30 days.The results showed that after adding with 0.3 and 0.5mg/kg Selenium yeast,the feed/gain was decreased by12.86% and 9.02%,respectively.but the hide surface area was increased by 11.30% and 11.97%.In blood plasma,the activity of GSH-Px and the CAT activity were significantly elevated in response to 0.3 and 0.5 Se supply.In liver tissue,Significant increases(P<0.05)in GSH-Px activity and CAT activity were only obtained from adding group 1,and the content ofMAD of adding group 2 decreased at most.Compared with control group,the GSH-Px activity in musle tissue from addin group 1 to group 3 was Significantly increased by 17.66%、57.91% and 65.02%(P<0.05),respectively.In liver and longissimus muscle,GSH-Px mRNA expression levels increased with increase in the levels of Yeast selenium,but they were no Significant difference between adding group 2 and adding group 3.The results above suggested that the appropriate Selenium yeast supplementation level was 0.3mg /kg in young Rex rabbits.