摘要
将体质量基本一致的健康1日龄AA肉鸡320只,随机分为对照组和试验组,饲养在环境管理条件不同的2个鸡舍中。通过定期测定气载细菌、真菌、内毒素等气溶胶的含量和新城疫抗体水平与免疫器官指数等肉鸡免疫方面的功能来研究不同的养殖环境对商品肉鸡免疫功能的影响。结果表明,试验组的微生物含量显著高于对照组;对照组的新城疫抗体水平高于试验组,在35、42、49日龄时差异显著;与对照组相比,试验组鸡只的脾脏指数显著降低,胸腺指数极显著降低,法氏囊指数降低不明显。由此可见,鸡舍环境质量差、微生物气溶胶含量高,对鸡体的ND抗体效价和免疫器官的发育功能会产生负面影响。故而,保持饲养环境良好的清洁卫生条件,是健康养殖的重要措施之一。
Three hundred and twenty one-day-old healthy Arbor Acres（AA） broilers were randomly divided into two groups,i.e.,experimental group and control group,and later bred in the chicken houses of different sanitary environmental management conditions.To better understand the impacts of different raising environments on broilers’ immune function,the concentrations of aerobic bacteria,fungi,and endotoxins in the air of the chickens’ houses were determined periodically.Meanwhile,newcastle disease antibody（ND-Ab） levels and immune organ indexes of broilers were detected.The results showed that the microbial concentrations of the experimental group were significantly higher than those of the control group （P〈0.05）.Newcastle antibody levels of the control group were higher than those of the experimental group significantly （P〈0.05） at 35,42 and 49 days.The spleen index was influenced significantly （P〈0.05） compared with the control one and very significant impact on the thymus （P〈0.01） was identified,while little effect on the bursa （P〉0.05） was observed.Therefore,the poor sanitary condition and high concentration of microbial aerosols may have a bad effect on the immune functions of broilers,from which it could be concluded that keeping good sanitary condition of raising environments is one of the important measures to keep animals healthy.
出处
《华中农业大学学报》
CAS
CSCD
北大核心
2011年第1期34-38,共5页
Journal of Huazhong Agricultural University
基金
国际合作项目(2009DFA32890)
关键词
养殖环境
微生物气溶胶
免疫功能
抗体效价
脏器指数
raising environments
microbial aerosols
immune function
antibody titer
organ indexes
