摘要
Abstract
The purpose of the study was to study the effects of different levels of glucose oxidase on the egg laying performance,immunity and antioxidant capacity of Hyline brown laying hens in the late laying period.1 000 healthy Hyline brown laying hens were selected and randomly divided into five groups,with 10 replicates per group and 20 hens per replicate.The Hyline brown laying hens in the control group,test group 1,test group 2,test group 3,and test group 4 were fed with 0,100,200,400 and 800 mg/kg of glucose oxidase.The pre-test period was seven days,and the formal test period was 56 days.The results showed that the egg laying rate and average daily egg weight of Hyline brown laying hens in the test group 2,test group 3 and,test group 4 were significantly higher than those in the control group(P＜0.05),and the feed-to-egg ratio was significantly lower than that in the control group and the test group 1(P＜0.05).The Huff units of eggs in the test group 3 and test group 4 were significantly higher than those in the control group and test group 1(P＜0.05).The serum levels of immunoglobulin A and immunoglobulin M in the test group 3 and test group 4 were significantly higher than those in the control group and test group 1(P＜0.05),and the serum levels of immunoglobulin G in the test group 2,test group 3,and test group 4 were significantly higher than those in the control group(P＜0.05).The serum levels of interferon-y,interleukin-2,and interleukin-10 in the test group 2,test group 3,and test group 4 were significantly higher than those in the control group(P＜0.05).The level of tumor necrosis factor-α was significantly lower than that of the control group and the test group 1(P＜0.05).The activities of total antioxidant capacity,glutathione peroxidase,and superoxide dismutase in the serum of laying hens in the test group 2,test group 3 and test group 4 were significantly higher than those in the control group(P＜0.05),and the serum activities of superoxide dismutase in the test group 3 and test group 4 were significantly higher than those in the group 1(P＜0.05).The serum malondialdehyde level in all glucose oxidase groups was significantly lower than that in the control group(P＜0.05).The study indicates that glucose oxidase can improve egg production performance,immunity,and antioxidant function of laying hens,and the appropriate addition level of glucose oxidase is 400 mg/kg.关键词
海兰褐蛋鸡/葡萄糖氧化酶/产蛋性能/免疫/抗氧化Key words
Hyline brown laying hen/glucose oxidase/laying performance/immunity/antioxidation分类
农业科技
