蒙脱石对蛋鸡生产性能、蛋品质和血清抗氧化指标的影响

试验旨在研究蒙脱石对北京油鸡蛋鸡生产性能、蛋品质和血清抗氧化指标的影响。选取体重相近、健康良好的180只22周龄的北京油鸡,随机分为5组,每组4个重复,每个重复9只鸡。对照组饲喂不添加蒙脱石的基础饲粮;试验组分别在基础饲粮中添加1‰、2‰、3‰、4‰蒙脱石。预试期7 d,正试期56 d。结果表明:添加蒙脱石对蛋鸡平均日采食量、产蛋率、平均日产蛋重等指标影响显著;与对照组相比,2‰蒙脱石组产蛋率和平均日产蛋重显著提高;1‰、2‰、3‰、4‰蒙脱石组的蛋重、蛋形指数、蛋壳色泽、蛋壳强度、蛋白高度、蛋壳厚度等蛋品质指标均无显著影响;与对照组相比,3‰、4‰蒙脱石组的血清总抗氧化能力显著降低,2‰、3‰蒙脱石组的总超氧化物歧化酶含量显著提高。由此可见,蒙脱石可以改善蛋鸡生产性能和血清抗氧化指标,在霉菌毒素不超标的情况下,北京油鸡饲粮推荐添加剂量为2‰。

Effects of Montmorillonite on Production Performance,Egg Quality and Serum Antioxidant Index of Laying Hens

The purpose of this study was to investigate the effects of montmorillonite on performance,egg quality and serum antioxidant index of Beijing oil laying hens.One hundred and eighty 22-week-old Beijing oil laying hens of similar weight were randomly divided into 5 groups and each group consisted of 4 replicates with 9 chickens per replicate.The control group was fed basic diet,and experimental group added 1‰,2‰,3‰and 4‰montmorillonite into basic diet.The pretrail period was 7 days and the experimental period was 56 days.The results showed as follows:The montmorillonite level significantly affected the average daily food intake,egg yield,average daily egg weight of laying hens(P<0.05).Compared with control group,the egg production rate and average daily egg weight in group 2‰MMT were significantly increased(P<0.05).The montmorillonite level had no significant effect on egg quality such as egg weight,egg shape index,egg shell color,egg shell strength,protein height,and egg shell thickness among groups(P>0.05).Compared with control group,adding 3‰or more montmorillonite significantly reduced the total antioxidant capacity of serum(P<0.05),and adding 1‰and 2‰montmorillonite significantly increased the total superoxide dismutase content(P<0.05).It can be seen that montmorillonite can improve the production performance and serum antioxidant index of layers,and the recommended dosage for Beijing oil layer is 2‰.