低聚木糖和低聚壳聚糖及其复合制剂对肉鸡生产性能、免疫机能和盲肠菌群的影响  

Effects of xylooligosaccharide and chitosan oligosaccharide alone or in combination on growth performance,immune function and cecal microflora of broilers

作　　者：冷智贤 杨雪[1] 洑琴 白建勇[1] 温超[1] 周岩民[1] 

机构地区：[1]南京农业大学动物科技学院,江苏南京210095

出　　处：《畜牧与兽医》2014年第5期13-18,共6页Animal Husbandry & Veterinary Medicine

基　　金：江苏省农业三项工程项目(SX2007073);中国科学院院地合作项目(Y026011122)

摘　　要：本试验旨在研究低聚木糖（XOS）和低聚壳聚糖（COS）及其复合制剂对肉鸡生产性能、免疫机能和盲肠菌群的影响。将240只1日龄爱拔益加（AA）肉鸡随机分为5组,每组6个重复,每重复8只。对照组（CON）饲喂基础日粮,其他处理组分别在基础日粮中添加100 mg/kg XOS（XOS）,30 mg/kg COS（COS）,50 mg/kg XOS＋10 mg/kg COS（XCⅠ）,75 mg/kg XOS＋15 mg/kg COS（XCⅡ）。结果表明：与对照组相比,XOS、XCⅠ、XCⅡ均能显著提高肉鸡21 d、42 d平均体重（BW）和1~21 d平均日增重（ADG）（P〈0.05）;XCⅠ、XCⅡ较COS 42 d体重和1~42 d的ADG显著提高（P〈0.05）。与对照组相比,XCⅠ、XCⅡ14 d、28 d肉鸡胸腺指数及14 d肉鸡十二指肠和空肠黏膜IgG含量;且XCⅠ14 d肉鸡盲肠乳酸杆菌数量较CON和XOS也有提高。结果提示,XOS和COS能改善肉鸡生产性能,改善肉鸡微生物区系,提高机体免疫功能,且XOS与COS低剂量复合添加效果优于单一寡糖,两者具有协同效应,本试验条件下以50 mg/kg XOS＋10 mg/kg COS复合效果为最佳。This experiment was conducted to evaluate the effect of xylooligosaccharide （XOS） and chitosan oligosaccharide （COS） on growth performance, immune function and cecal microflora of broilers. A total of 240 AA broilers at one-day-old were randomly assigned into 5 treatments with 6 replicates of 8 broilers each. Broilers were fed a basal diet and a basal diet supplemented with 100 mg/kg XOS （XOS） , 30 mg/kg COS （COS）, 50 mg/kg XOS＋10 mg/kg COS （XC Ⅰ ） and 75 mg/kg XOS＋15 mg/kg COS （XC Ⅱ ）, respectively. The results showed that XOS, XC Ⅰ and XC Ⅱ increased body weight （BW） at 21 d and 42 d and average daily gain （ADG） during 1 and 21 d compared with control broilers （P〈0. 05）. Meanwhile, the birds fed XC I and XC 11 had greater 42 d BW and ADG during 1 to 42 d than those fed COS. Compared with CON, XC Ⅰ , XC Ⅱ increased thymus index at 14 and 28 d and the contents of IgG in duodenum and jeju- num at 14 d. XC I advanced the counts of Lactobacilluz in cecum at 14 d compared with CON and XOS. The results implied the XOS and COS added in diets promoted the growth, improved microbialflora and enhanced immune functions. In addition, XOS and COS added in com- bination at a low-dose was better than single oligosaccharides, suggesting that the complex preparation might create synergistic effect. Under the experimental conditions, the optimal combination of composite was 50 mg/kg XOS＋10 mg/kg COS.

关 键 词：低聚木糖 低聚壳聚糖 复合寡糖 肉鸡 生产性能 免疫机能 

分 类 号：S816[农业科学—饲料科学]