解淀粉芽孢杆菌对肉鸡生长性能、小肠发育和血清生化指标及免疫功能的影响

Effect of Bacillus amyloliquefaciens on the Growth Performance,Small Intestinal Development,Serum Biochemical Indices and Immune Function in Broilers

本试验旨在研究日粮中添加解淀粉芽孢杆菌对肉鸡生长性能、小肠发育性变化、血清生化指标以及免疫功能的影响。选取1日龄健康肉鸡（Ross 308）360羽,随机分为3个处理组（空白对照组、抗生素组、解淀粉芽孢杆菌组）,每组6个重复,每个重复20只。结果表明：相对于对照组,日粮中添加解淀粉芽孢杆菌显著提高了1~42日龄肉鸡的平均日增重（P〈0.05）,显著降低了1~21日龄肉鸡的饲料增重比（P〈0.05）;显著提高了28日龄肉鸡回肠的体重校正长度（P〈0.05）,显著增加了14、28日龄肉鸡小肠相对肠重（P〈0.05）和14、21、28日龄肉鸡回肠的绒毛高度（P〈0.05）;与对照组和抗生素组相比,解淀粉芽孢杆菌组42日龄肉鸡血清中总蛋白的含量显著增加,7和21日龄肉鸡血清中IgG和IgM的含量显著性提高。

The present experiment was conducted to investigate the effects of Bac illus amyloliquefaciens on growth performance,small intestinal development,serum biochemical parameters and immune functions in broiler chickens.A total of 3601-day-old Ross 308 broilers were randomly divided into 3 treatments（control group,antibiotics group and Bacillus amyloliquefaciens group）,6 replicates for each treatment,and 20 birds per replicate.The results showed that,compared with the control birds,dietary Bacillus amyloliquefaciens significantly increased the average body gain from d 1 to 42（P〈0.05） and improved the feed efficiency from d 1 to 21（P〈0.05）.Birds fed with Bacillus amyloliquefaciens had higher（P〈0.05） relative ileum length on d 28,the small intestinal relative weight on d 14 and 28（P〈0.05） and the villus height of ileum（P〈0.05） on d 14,21 and 28 than control birds.Bacillus amyloliquefaciens significantly increased the concentrations of serum total protein in serum on d 42（P〈0.05） and immunoglobulin G and immunoglobulin M on d 7 and d 42 compared with control and antibiotic birds.