甘氨酸铜替代硫酸铜对断奶仔猪生长性能、血清生化参数和粪铜排放的影响

研究了日粮添加低剂量甘氨酸铜替代硫酸铜对断奶仔猪生长性能、血清生化参数及粪铜排放量的影响,以确定甘氨酸铜替代硫酸铜在断奶仔猪上的饲喂效果.结果表明,与200 mg/kg硫酸铜组相比,100 mg/kg甘氨酸铜组平均日增重、平均日采食量、料重比和腹泻率等指标均未见显著差异;与其他两组相比,50 mg/kg甘氨酸铜组日增重显著降低、料重比显著升高.各处理组血清铜和铁的含量均无显著差异;100 mg/kg甘氨酸铜组血清天门冬氨酸氨基转移酶的活性显著高于其他两处理组.50 mg/kg和100 mg/kg甘氨酸铜处理组粪中铜含量显著低于200 mg/kg硫酸铜组;各处理组粪中铁和锌的含量均未见显著差异.结果提示,在断奶仔猪日粮中添加100 mg/kg的甘氨酸铜可有效替代200 mg/kg的硫酸铜,甘氨酸铜的使用可大幅度减少饲料中铜的添加量,降低铜排泄对环境的污染.

Effect of dietary supplementation with copper-glycine instead of copper sulfate on growth performance, serum biochemical parameters and fecal copper excretion in weaned piglets

The paper determined the effects of dietary supplementation with low levels of copper-glycine instead of copper sulfate on growth performance, serum biochemical parameters, and fecal copper excretion in weaned piglets. The results showed that, compared with 200 mg/kg copper sulfate group, the average daily gain, average daily feed intake, gain: feed ratio, and diarrhea rate showed no significant differences in 100 mg/kg copper-glycine group. Compared with the other two groups, the ADG in 50 mg/kg copper-glycine group was significantly decreased and G/F ratio significantly increased respectively. Among the three treatment groups, the serum mineral contents, such as copper and iron had no significant difference. The serum activity of glutamic-oxalacetic transaminase in 100 mg/kg copper-glycine group was significantly higher than that in the other two treatment groups. The fecal copper concentrations in 50 mg/kg and 100 mg/kg copperglycine group were significantly lower than that in 200 mg/kg copper sulfate group. The fecal contents of iron and zinc showed no significant differences among the three groups. In conclusion, these results suggested that dietary supplementation with 100 mg/kg Cu as glycine copper could effectively replace the 200 mg/kg Cu as cupric sulfate, then reduce the additive amount of copper in feed and decrease the pollution of fecal copper discharged to the environment.