复合型抗应激添加剂对夏季蛋鸡产蛋性能、蛋品质及血清生化指标的影响

为了研究复合型抗应激添加剂对夏季蛋鸡产蛋性能、蛋品质及血清生化指标的影响，试验选用120只42周龄伊莎褐蛋鸡，随机分为2组，每组设6个重复，每个重复lO只；对照组饲喂基础日粮，试验组饲喂基础日粮＋80mg／kg复合型抗应激添加剂——禽专用添佳安肽，试验期为60d。结果表明：与对照组相比，试验组产蛋率显著提高5．56％（P〈0．05），料蛋比显著降低4．74％（P〈0．05），但对采食量和平均蛋重无显著影响（P〉0．05）；试验组蛋壳强度显著提高15．27％（P〈O．05），但对蛋壳厚度、蛋白高度、哈夫单位无显著影响（P〉0．05）；试验组血清皮质醇水平显著下降53．91％（P〈0．05），T_3、T_4水平分别显著下降20．12％、23．57％（P〈0．05），尿素氮水平显著下降35．35％（P〈0．05），但对血糖水平无显著影响（P〉0．05）。说明蛋鸡日粮中添加复合型抗应激添加剂——禽专用添佳安肽，具有显著抗热应激效应和增加蛋鸡采食量的作用。

Effects of compound anti - stress additive on laying performance,egg quality and serum biochemical indexes for laying hens in summer

To study the effects of compound anti -stress additive on laying performance, egg quality and serum biochemical indexes for laying hens in summer, one hundred and twenty 42 week - old Isa Brown layers were randomly divided into 2 groups with 6 replicates of ten each. The control group was fed the basal diet ,and the experimental group was fed the basal diet supplemented with 80 mg/kg compound anti - stress addi- tive - Tianjia - An - Tai for poultry. The experiment lasted 60 days. The results showed as follows ： compared with the control group, the laying rate of the experimental group was significantly increased by 5.56% （ P 〈 0.05 ）, and the feed - to - egg ratio of the experimental group was sig- nificantly decreased by 4.74% （ P 〈 0.05 ）, but there were no significant effects （ P 〉 0.05 ） on the feed intake and average egg weight in the experimental group; the eggshell strength of the experimental group was significantly increased by 15.27% （P 〈0.05 ） ,while there were no sig- nificant effects on the eggshell thickness, albumen height and Haugh unit （ P 〉 0.05 ） in the experimental group ; the serum cortisol level of the ex- perimental group was significantly decreased by 53.91% （P 〈 0.05 ）, and the T3 and T4 levels were significantly decreased by 20.12% and 23. 57% （ P 〈 0.05 ）, respectively ; the serum urea nitrogen level was significantly decreased by 35.35% （ P 〈 0.05 ）, but there was no significant effect（ P 〉 0.05） on the blood glucose level in the experimental group. The results indicate that the diets supplemented with compound anti - stress additive - Tianjia - An - Tai for poultry have significant effects on the anti - heat stress and the increase of feed intake in laying hens.