Department of Animal Science, Faculty of Agriculture, Shahid Bahonar University of Kerman, Kerman, Iran.
Department of Food Hygiene and Public Health, Faculty of Veterinary Medicine, Shahid Bahonar University of Kerman, Kerman, Iran.
Probiotics Antimicrob Proteins. 2020 Jun;12(2):461-472. doi: 10.1007/s12602-019-09558-1.
A total of 288-day-old male broilers were allocated to six dietary treatments to evaluate the effects of zinc source and Bacillus coagulans supplements and their interaction on growth, intestinal microbial population, carcass traits and meat quality in broiler chickens. Three levels of dietary supplemental Zn source (100 mg/kg of DM diet zinc oxide, 25 and 50 mg/kg of diet zinc oxide nanoparticles (Zn-nan)) and two levels of B. coagulans (0 and 100 mg/kg of diet) were combined as a completely randomised design with a 3 × 2 factorial arrangement. B. coagulans increased the body weight gain, body weight and feed conversion ratio. The lactic acid producing bactereia of ileal were increased by B. coagulans supplementation, and its coliform count was decreased by Zn-nan in a dose-dependent manner. The B. coagulans increased the relative weights of legs and proventriculus and reduced weights of livers, abdominal fat and meat thiobarbituric acid (TBA) value. Likewise, dietary B. coagulans increased pH, yellowness and lightness values of leg muscles. Birds fed Zn-nan50 had lower liver weight, TBA and cooking loss and higher yellowness values than chicks fed ZnO-100. In conclusion, the dietary supplementation with B. coagulans improved broiler performance, microbial population and meat quality. The Zn-nan in lower dose could be a good substitution in mineral premix instead of zinc oxide. In addition, the Zn-nan improved intestinal microbial population, carcass characteristics and oxidative stability of chicken meat; however, the combination of two levels of Zn-nan with B. coagulans did not vary the measured parameters.
共有 288 日龄雄性肉鸡被分配到六种饮食处理中，以评估锌源和凝结芽孢杆菌补充剂及其相互作用对肉鸡生长、肠道微生物种群、胴体特性和肉质的影响。三种水平的日粮补充锌源（100mg/kg 日粮氧化锌、25 和 50mg/kg 日粮氧化锌纳米颗粒（Zn-nan））和两种水平的凝结芽孢杆菌（0 和 100mg/kg 日粮）以完全随机设计与 3×2 因子排列相结合。凝结芽孢杆菌增加了体重增加、体重和饲料转化率。凝结芽孢杆菌的补充增加了回肠中的乳酸产生细菌数量，并且其大肠菌群计数呈剂量依赖性降低。凝结芽孢杆菌增加了腿部和前胃的相对重量，降低了肝脏、腹部脂肪和肉中硫代巴比妥酸（TBA）值的重量。同样，日粮凝结芽孢杆菌增加了腿部肌肉的 pH 值、黄度和亮度值。与饲喂 ZnO-100 的雏鸡相比，饲喂 Zn-nan50 的雏鸡肝脏重量、TBA 和蒸煮损失较低，黄度值较高。总之，日粮凝结芽孢杆菌的补充提高了肉鸡的生产性能、微生物种群和肉质。低剂量的 Zn-nan 可以替代矿物预混料中的氧化锌。此外，Zn-nan 改善了肠道微生物种群、胴体特性和鸡肉的氧化稳定性；然而，两种水平的 Zn-nan 与凝结芽孢杆菌的组合并没有改变所测量的参数。
