复合小肽制剂对肉鸡生产性能和发病率及死亡率的影响

目的]研究复合小肽制剂对肉鸡生产性能和发病率及死亡率的影响,为其在肉鸡生产中的科学应用提供技术支撑。方法]试验选择28日龄体重相似的健康罗斯308肉鸡1200只,随机分为4组,每组下设4个重复,每个重复75只鸡。对照组所喂的基础日粮中不含复合小肽制剂,试验1、2、3组所喂的日粮中分别含2.0%、2.5%和3.0%的复合小肽制剂。结果]日粮中添加复合小肽制剂,能使肉鸡终末体重和日均增重得到显著或极显著提高(P<0.05或P<0.01),料重比、腹泻率、呼吸道病发病率和死亡率得到显著或极显著降低(P<0.05或P<0.01)。结论]复合小肽制剂能明显改善肉鸡的生产性能和健康状况,较适宜的添加量为2.5%~3.0%。

Effects of Compound Small Peptide Preparation on Productive Performance,Morbidity and Mortality of Broilers

Objective]To study the effects of compound small peptide preparation on productive performance,morbidity and mortality of broilers,and to provide technical support for its scientific application in broiler production.Method]A total of 1 200 healthy Ross 308 broilers aged 28 days with the similar weight were randomly divided into four groups,each with four replicates and 75 chickens per replicate.The control group fed a basal diet with no addition of the compound small peptide preparation,and the experimental group 1,2 and 3 fed a basal diet supplemented with 2.0%,2.5% and 3.0% compound small peptide preparation,respectively.Result]The dietary supplementation of compound small peptide preparation significantly increase the final weight and average daily gain of broilers (P<0.05 or P<0.01),and significantly reduce the feed-weight ratio,diarrhea rate,and morbidity and mortality associated with respiratory diseases (P<0.05 or P<0.01).Conclusion]The compound small peptide preparation can significantly improve the productive performance and health status of broilers,and the recommended dietary supplementation level is 2.5%-3.0%.