不同添加剂对持续热应激肉鸡生长性能及生理机能的影响

Effect of Different Additives on Production Performance and Physiological Function in Broiler of Sustained Heat Stress

为了研究不同添加剂对持续热应激环境下的AA白羽肉鸡生长性能及生理机能的影响,选取126只1日龄AA肉鸡,随机分为空白对照组、欣养健组、丹宁健组、复方双黄口服液组、复方党忍口服液组、复方滑连口服液组6个处理组,每组3个重复,每个重复7只。试验期间环境温度(31±1)℃,湿度均为70%~90%,试验周期42 d。分别于3日龄、21日龄、42日龄时采集肉鸡血液,测定血液中尿素氮(BUN)、免疫球蛋白(IgA)、肌酸激酶(CK)、碱性磷酸酶(ALP)、谷丙转氨酶(ALT)、谷草转氨酶(AST)、皮质醇、甲状腺素含量。剖检42日龄试验鸡,测定脏器指数。结果显示,5种添加剂均对热应激引起的肉鸡肝脏损伤具有修复保护作用,能够提高肉鸡采食量及降低料肉比,促进机体蛋白代谢及利用;欣养健、丹宁健、复方双黄口服液、复方党忍口服液具有增强机体免疫力的作用;添加欣养健、复方党忍口服液和复方滑连口服液对热应激引起的肌肉损伤有一定改善作用。综上所述,5种添加剂对持续热应激条件下的肉鸡的生长性能及生理机能具有改善作用。

The experiment was to study the effects of different additives on growth performance and physiological function of AA white feather broiler under continuous heat stress.One hundred and twenty-six AA broilers at the age of one day old were selected and randomly divided into 6 treatment groups:blank control group,xinyangjian group,danningjian group,compound shuanghuang oral liqiud group,compound dangren oral liqiud group,and compound hualian oral liqiud group with three repetitions per group and seven broilers per repetition.During the test period,the environment temperature was(31±1)℃,and the humidity was 70%~90%.The test period was 42 days.Blood samples of broilers were collected at the ages of 3,21 and 42 days,respectively,and the contents of blood urea nitrogen(BUN),immunoglobulin(IgA),creatine kinase(CK),alkaline phosphatase(ALP),glutamic-pyruvic transaminase(ALT),glutamic oxalacetic transaminase(AST),cortisol and thyroxine were determined.The index of viscera was determined.The results showed that all the five additives could repair and protect the liver injury caused by heat stress in broiler chickens,improve the intake of broiler chickens,reduce the feed to meat ratio,and promote the metabolism and utilization of body proteins.Xinyangjian,danningjian,and compound shuanghuang oral liquid,compound dangren oral liquid had the effect on enhancing the body immunity.Adding xinyangjian,compound dangren oral liquid and compound hualian oral liquid improved the muscle injury caused by heat stress.In summary,5 additives can improve the growth performance and physiological function of broiler under continuous heat stress.