Effects of chito-oligosaccharide supplementation on performance, nutrient digestibility, and serum composition in broiler chickens
Effects of chito-oligosaccharide supplementation on performance, nutrient digestibility, and serum composition in broiler chickens
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补充壳寡糖对肉鸡生产性能、营养物质消化率和血清成分的影响
DOI：
10.1093/ps/86.6.1107
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发表时间：
2007-06-01
期刊：
影响因子：
4.4
通讯作者：
Lee, H. S.
中科院分区：
文献类型：
--
作者：
Li, X. J.;Piao, X. S.;Lee, H. S.
试验选用196只1日龄肉仔鸡，随机分为4组，研究日粮中添加壳寡糖（COS）对肉仔鸡生长、养分消化率和血清组成的影响。实验饮食由基于玉米、大豆粉和鱼粉的未补充的对照饮食或补充有金霉素、50 mg/kg COS或100 mg/kg COS的类似饮食组成。将每种处理饲喂给7个重复的禽类围栏，每个围栏7只禽类。肉鸡的生产性能，养分消化率，盲肠微生物浓度和血清指数进行了测定，在启动（d 21）和生长阶段（d 42）结束。在试验前期和总体上，添加50或100 mg/kg COS组肉鸡的平均日增重、平均日采食量和饲料转化率均显著高于对照组（P < 0.05）。饲喂金霉素的鸡的表现一般介于对照组和2种COS处理组之间。与对照组或金霉素组相比，添加100 mg/kg COS组的日粮DM、能量、钙和磷的消化率更高，盲肠乳酸菌浓度更高（P < 0.05），血清甘油三酯和总胆固醇水平更低（P < 0.05）。在生长期，添加100 mg/ kg COS组的钙消化率和CP沉积率显著高于对照组（P < 0.05），盲肠大肠杆菌浓度显著低于对照组（P < 0.05）。50 mg/ kg COS组血清生长激素水平显著高于其他处理组（P < 0.05）。100 mg/ kg COS组血清甘油三酯含量显著低于其他处理组（P < 0.05），血清高密度脂蛋白胆固醇含量显著高于其他处理组（P < 0.05），血清总蛋白含量显著高于其他处理组（P < 0.05）。结果表明，日粮中添加COS可提高肉鸡的平均日增重，其作用机制可能与提高日粮采食量和养分消化率以及调节盲肠微生物植物群浓度有关。此外，COS还可增加血清蛋白和高密度脂蛋白胆固醇，降低血清甘油三酯。
A total of 196 day-old male broiler chicks were randomly allocated to 1 of 4 treatments in a study conducted to determine the effects of dietary supplementation of chito-oligosaccharide (COS) on growth, nutrient digestibility, and serum composition. The experimental diets consisted of an unsupplemented control diet based on corn, soybean meal, and fish meal or similar diets supplemented with either chlortetracycline, 50 mg/kg of COS, or 100 mg/kg of COS. Each treatment was fed to 7 replicate pens of birds, with 7 birds per pen. Broiler performance, nutrient digestibility, cecal microbial concentrations, and serum indices were measured at the end of the starter (d 21) and grower phases (d 42). During the starter period and overall, broilers fed 50 or 100 mg/kg of COS had better (P < 0.05) average daily gain, average daily feed intake, and feed conversion than the control birds. The performance of birds fed chlortetracycline was generally intermediate between that of the control and the 2 COS treatments. Compared with the birds in the control or chlortetracycline treatments, the birds receiving 100 mg/kg of COS had better nutrient digestibility of DM, energy, calcium, and phosphorus; higher ( P < 0.05) concentrations of cecal Lactobacillus; and lower (P < 0.05) serum triglyceride and total cholesterol during the starter phase. During the grower phase, the birds fed 100 mg/ kg of COS had higher (P < 0.05) calcium digestibility and CP retention than those fed the chlortetracycline treatment, and lower concentrations of cecal Escherichia coli than birds in the control treatment. The serum growth hormone level in birds fed 50 mg/ kg of COS was higher (P < 0.05) than in the other treatments. The birds fed 100 mg/ kg of COS had lower (P < 0.05) serum triglyceride, higher (P < 0.05) serum high-density lipoprotein cholesterol, and higher serum total protein content than birds in the other treatments. In conclusion, dietary supplementation with COS appeared to improve the average daily gain of broilers by increasing the average daily feed intake and nutrient digestibility and modulating the concentrations of cecal microbial flora. Additionally, COS increased serum protein and high-density lipoprotein cholesterol and decreased serum triglyceride.