饲粮中添加抗菌肽对肉鸭增重及血清尿素氮、总蛋白水平的影响

240只1日龄肉鸭随机成分4组,每组设3个重复,对照组用基础日粮,试验组在基础日粮上每千克分别添加1、2、3mL抗菌肽制剂。结果显示:1)2、3mL/kg添加量组增重效果显著(P<0.05),3mL/kg添加量组最佳;净肉率升高,达到显著水平(P<0.05),其中主要是胸肌率上升;腹脂率降低但差异不显著(P>0.05);料重比无显著变化(P>0.05)。2)血清总蛋白浓度差异不显著(P>0.05),但尿素氮浓度下降,2、3mL/kg添加量组达显著水平(P<0.05),3mL/kg添加量组最低。

The effects of antibiotic peptide addition in feed on the body weight gain, serum urea nitrogen and total protein level in meat duck

240 meat ducks of 1 day old were divided into four treatments with three replicates per treatment and given control diets(basal diets) or treatment diets(basal diets supplemented with 1,2,3 mL/kg antibacterial peptide).The results indicated that:1)basal diets supplemented with antibacterial peptide 2 mL/kg and 3 mL/kg(P < 0.05)significantly increased body weight;meat productivity was increased in 3 mL/kg dose group(P < 0.05).However,It were no significant differences in feed to gain ratio and percentage of abdominal fat(P > 0.05).2)There was no significant difference in total protein(P > 0.05),but the concentrations of serum urea nitrogen decreased significantly in groups supplemented with 2 mL/kg and 3 mL/kg antibacterial peptide(P < 0.05=.