不同锌源对断奶仔猪免疫和抗氧化作用的影响

选用 1 4 4头断奶仔猪 ,随机分成 4组 :一组为对照 ,饲喂添加氧化锌 1 0 0 mg/kg的日粮 ,另 3组分别饲喂添加氧化锌 30 0 0 m g/kg、蛋氨酸锌 1 0 0 m g/kg和纳米氧化锌 30 0 m g/kg的日粮 ,进行为期 5 2 d的饲养试验 ,以研究不同锌源对断奶仔猪消化和免疫功能的影响。结果表明 :高剂量氧化锌可提高血清中 Ig A的含量 5 .0 7%(P<0 .0 5 ) ,高剂量氧化锌和纳米氧化锌可使血清中免疫球蛋白 Ig M含量分别提高 2 .97%(P<0 .0 5 )和 5 .6 7%(P<0 .0 1 ) ;蛋氨酸锌可使血清中SOD活性比对照组提高 1 .36倍 (P<0 .0 1 ) ,高剂量氧化锌和蛋氨酸锌可分别使肝脏中 SOD活性提高 2 8.2 0 %(P<0 .0 5 )和 2 9.33%(P<0 .0 5 ) ;高剂量氧化锌、蛋氨酸锌和纳米氧化锌均可提高肝脏组织中金属硫蛋白 (MT)含量

Effect of Different Zinc Source on Immune and Antioxidation in Weanling Swine

One hundred and forty four piglets were divided into four groups on breed,the treatment groups received the same basal diet,supplemented with 100 mg/kg ZnO(control),(3 000) mg/kg ZnO,100 mg/kg Zn-Met and 300 mg/kg nanometer ZnO respectively.The results of immune investigation showed that (3 000) mg/kg ZnO increased IgA level by 5.07%(P<0.05) as compared with the control,the (3 000) mg/kg ZnO and 100 mg/kg nanometer ZnO increased the IgM level in serum by 2.97%(P<0.05) and 5.67%(P<0.01).The analysis of SOD in serum and liver showed that adding 100 mg/kg Zn-Met increased the SOD level in serum by 1.36-fold as compared with control,and adding (3 000) mg/kg ZnO and 100 mg/kg Zn-Met also increased the SOD level in the liver by 28.20% and 29.33%(P<0.05).The analysis of liver samples showed that three treaments increased the MT concentration in the liver.