Department of Animal Resource and Science, Dankook University, Cheonan-si, Chungnam 31116, South Korea.
Morningbio Co., Ltd, Cheonan, Chungnam 31116, South Korea.
Poult Sci. 2018 Dec 1;97(12):4351-4358. doi: 10.3382/ps/pey339.
This study was conducted to evaluate the effects of the blend of organic acids (OAs) and medium-chain fatty acids (MCFAs) in broiler chickens. A total of 816 1-d-old male Ross 308 broiler chickens (35 ± 0.44 g) were randomly allocated into 1 of the following 6 dietary treatments (17 broilers per pen with 8 pens per treatment): dietary treatments consisted of corn-soybean meal-based basal diet and the basal diet supplemented with 0.02, 0.03, 0.04, 0.05, and 0.06% blend of OAs and MCFAs. The study lasted 5 wk during which growth performance was determined. In the current study, the inclusion of 0.02, 0.03, 0.04, 0.05, and 0.06% blend of OAs and MCFAs in the basal diet linearly increased (P < 0.05) body weight gain and improved feed conversion ratio (P < 0.0001) on day 7 to 14, day 14 to 35, as well as overall. Increasing inclusion of the blend of OAs and MCFAs levels in the diets also linearly increased (P = 0.001) the digestibility of dry matter on day 35. Broilers fed with different levels of the blend of OAs and MCFAs showed a linear increment (P = 0.042) in Lactobacillus concentration and decrease (P = 0.002) in Escherichia coli concentration. With regard to relative organ weight, a trend of linear reduction (P = 0.052) in bursa of Fabricius weight of broilers fed the blend of OAs and MCFAs was observed. There was a significant linear improvement (P = 0.011) in the IgG concentration associated with the inclusion of the blend of OAs and MCFAs levels in the diets. In conclusion, the blend of OAs and MCFAs supplementation positively influenced growth performance, nutrient digestibility, and excreta microflora in broiler chickens.
本研究旨在评估有机酸（OAs）和中链脂肪酸（MCFAs）混合物在肉鸡中的作用。选用 816 只 1 日龄雄性罗斯 308 肉鸡（35±0.44g），随机分为 6 种不同日粮处理组（每组 17 只鸡，每处理 8 个重复）：日粮处理组由玉米-豆粕基础日粮和基础日粮分别添加 0.02%、0.03%、0.04%、0.05%和 0.06%的 OA 和 MCFAs 混合物组成。本试验持续 5 周，期间测定生长性能。本研究表明，在基础日粮中添加 0.02%、0.03%、0.04%、0.05%和 0.06%的 OA 和 MCFAs 混合物可线性提高（P＜0.05）1-14 日龄、14-35 日龄和全期的体重增重，改善饲料转化率（P＜0.0001）。随着日粮中 OA 和 MCFAs 混合物水平的增加，干物质的消化率也呈线性增加（P=0.001）。在第 35 天，饲喂不同水平 OA 和 MCFAs 混合物的肉鸡的乳酸菌浓度呈线性增加（P=0.042），大肠杆菌浓度呈线性下降（P=0.002）。在相对器官重量方面，饲喂 OA 和 MCFAs 混合物的肉鸡法氏囊重量呈线性下降趋势（P=0.052）。随着日粮中 OA 和 MCFAs 混合物水平的增加，IgG 浓度呈显著线性提高（P=0.011）。综上所述，OA 和 MCFAs 混合物的添加可显著提高肉鸡的生长性能、养分消化率和粪便微生物菌群。
