优力安肽对黄羽肉鸡生长性能及血液生化指标的影响

选择1日龄健康北方3号公鸡450羽，随机分成6组，每组设3个重复，试验Ⅰ组为对照组，试验II、III、IV、V、Ⅵ组分别添加20、40、60、80、100 mg/kg的优力安肽，在同一鸡舍中用围栏将各组鸡隔开（温度、湿度、光照均满足正常生产需要），自动饮水，自由采食。分别于14、28、42、56、63日龄称重、采血，并于63日龄每重复取3只鸡进行屠宰。结果表明，日粮中添加60 mg/kg优力安肽的处理组与对照组相比，日增重提高了13.98%，料重比降低了3.43%（P<0.05）；试验鸡血液神经肽Y含量随日粮中优力安肽添加水平的增加而升高；试验鸡的日增重与血液生长激素含量呈强正相关（r=0.712），与胰岛素样生长因子-Ⅰ呈正相关（r=0.812）；料重比与胰岛素样生长因子-Ⅰ呈强负相关（r=-0.796）。北方3号公鸡日粮中添加60 mg/kg的优力安肽，生产性能和经济效益最佳。

Effects of Supplement of Youliantai on Growth Performance and Blood Biochemical Parameters in Broiler Chicken with Yellow-feather

450 one-day cockerels, which were healthy and named north third, were used in this experiment. Those cockerels were divided into six groups (75 cockerels, 3 replications in each group)randomly, Ⅰ,Ⅱ,Ⅲ,Ⅳ,Ⅴ,Ⅵ,groups were given 0, 20, 40, 60, 80, 100 mg/kg Youliantai respectively. All cockerels were under the same circumstance (temperature, moisture and illumination), automatic drinking water and foraging freedom. At the time of 14, 28, 42, 56, 63 d after beginning experiment, the weight of 5 cockerels from each replication were measured and collected the blood. 3 cockerels from each replication were abataged at 63 d. Results display that 60 mg/kg supplement can improve 13.98 percent body weight compared with control group each day and the ratio of forage to body weight were decreased 3.43 percent (P<0.05). The concentrations of serum neuropeptide Y were correlation with increased supplement of Youliantai. Increased weights every day were positive correlation with serum growth hormone (r=0.712) and with serum IGF-Ⅰ (r=0.812). The ratio of forage to body weight were negative correlation with IGF-Ⅰ (r=-0.796). The performances and economic returns were best at the optimal 60 mg/kg supplement concentration for Youliantai.