酪蛋白铜对仔猪生长及血清铜蓝蛋白和SOD活性的影响

选取体重 2 0kg左右杜长大仔猪 90头 ,随机分为 3组 ,分别饲喂添加 5 ,2 4 0mg/kg铜 (CuSO4·5H2 O)和5 0mg/kg酪蛋白铜的饲粮 ,试验期 3 0d ,试验第 1 5d和结束时对猪只称重 ,探讨酪蛋白铜对仔猪生长性能的影响 ,并对血液相关指标进行分析。结果表明 ,与 5mg/kg硫酸铜组相比 ,在生长前期 ,2 4 0mg/kg硫酸铜 (高铜 )的促生长效果最佳 ,日增重提高了 1 2 .3 %(P <0 .0 5 ) ,酪蛋白铜组日增重提高了 9.5 %(P <0 .0 5 ) ,但在生长后期 ,酪蛋白铜促生长作用超过了高铜 ,日增重提高了 1 7.0 %(P <0 .0 5 )。就整个生长期而言 ,酪蛋白铜的促生长效果最佳 ,日增重提高了 1 3 .6 %(P <0 .0 5 )。高铜明显降低了饲料转化率 ,降幅为 9.5 %(P <0 .0 5 ) ;高铜和酪蛋白铜组铜蓝蛋白活性分别提高了 3 4 .2 8%和 3 5 .71 %(P <0 .0 1 ) ,SOD分别提高 76 .4 %和 80 .8%(P <0 .0 1 )。由此可见 5 0mg/kg酪蛋白铜可显著影响猪的生长及血清相关指标水平 ,达到高剂量硫酸铜的效果

Effect of Casein Copper on Growth Performance and Sernm Caeruloplasmin and SOD Activity in Piglets

Ninety pigs (Duroc×Landrace×Yorkshire), weighing, 20 kg were allocated to three treatments with three replicates in a randomized block design to determine the effects of inorganic copper (5, 240 mg/kg CuSO_4) and organic copper (50 mg/kg casein copper) on growth performance and relative parameters in serum. The result showed that compared with the 5 mg/kg CuSO_4 group, 1) casein copper and 240 mg/kg CuSO_4 increased piglets growth performance, ADG were increased by 13.6% and 12.5% (P<0.05); 2) Caeruloplasmin and SOD activity were also improved significantly. Caeruloplasmin was increased by 34.28% and 35.71%(P<0.01), SOD activity was enhanced by 80.8% and 76.4% (P<0.01), respectively. The results indicated 50 mg/kg casein copper could improve piglets growth and affect serum Caeruloplasmin and SOD activity.