纳米硒、碘对免疫接种蛋鸡产蛋性能的影响

摘要

选取168只45周龄未接种大肠杆菌疫苗、体重及产蛋率相近的商品代尼克珊瑚粉产蛋鸡,研究了日粮中添加纳米硒、碘对免疫接种应激状态下蛋鸡产蛋性能的影响.采用均匀试验设计方法,设7个处理(包含一个基础对照组,一个疫苗对照组,除基础对照组外各组均接种大肠杆菌疫苗),每个处理4个重复,每个重复6只鸡,所用抗原为大肠杆菌为K88、K99、987p标准菌株.结果表明:接种疫苗显著降低蛋鸡产蛋性能(P0.05),比疫苗对照组提高26.25 %(P<0.05);料蛋比为2.16,比空白对照组降低了6.43 %,比疫苗对照组降低了19.35 %.%One hundred and sixty eight commercial Nic-T layers at 45weeks age were divided into seven groups(a black control,a vaccines control and five experimental groups) with 4 replicates of 6 layers,which there was no significant difference in weights and egg production and never inoculated E.coli before. A uniform design method was employed to study the effect of nano-selenium and iodine on the performance of inoculated E.coli layers,and standard bacteria of E.coli K88,K99,987p was used in this experiment. The results showed that: E.coli inoculation decreased layers performance significantly(P<0.05).The selenium and iodine influenced the performance of inoculated layers:the performance was improved by increasing iodine and decreased by increasing selenium,decreasing caused by selenium declined or disappeared by increasing iodine. The supplement of nano-se and iodine was 0.45,4.00 mg/kg，laying rates achieved 91.04 %. It was raised 1.48 percent(P<0.05) against the black control group.It was raised 26.25 percent(P<0.05) against the inoculation control. The suitable supplement of nano-se and iodine for feed/egg was 0.45,4.00 mg/kg，feed/egg achieved 2.16. It was decreased 6.43 % (P<0.05)against the black control group.It was decreased 19.35 %(P<0.05)against the inoculation control.