本研究的主要目的是阐明补充腕带对肉鸡生长性能的新影响,营养消化率,盲肠微生物群,肠道组织形态学,car体特征,和肉的质量。将总共300只雄性日龄Ross308肉鸡随机进行6个不同的处理组,每个处理具有5个重复,每个重复10只鸟。在处理1中,向肉鸡饲喂不添加添加剂的商业饮食;在处理2中,向肉鸡提供含有100mg/kg抗生素土霉素的商业饮食。然而,在处理3、4、5和6中,肉鸡接受补充25mg/kg的类似商业日粮,50mg/kg,75mg/kg,和100毫克/千克的B.decumbens磨碎的叶粉,分别,没有抗生素。在整个42天的审判中,每周记录每个重复的体重增加和总饲料摄入量,以确定生长性能。然后,在第21天和第42天,10只肉鸡从每个处理(每个重复两个)随机选择和屠宰,以评估营养物质的消化率,小肠的组织形态学,盲肠微生物群的数量,car体特征,以及乳房和鼓槌肌肉的质量。生长性能存在差异(p<0.05),表观回肠营养素消化率,肠道组织形态学,car体特征,和肉的质量。添加25mg/kg卧螺芽孢杆菌的动物具有较高的生长性能和较好的蛋白质消化率,纤维,和乙醚提取物,以及较高的绒毛高度和car体百分比,具有优异的肉质。此外,在启动阶段粪肠球菌的生长受到抑制。总之,在刺激商业肉鸡的生产力中,可以建议以25mg/kg的剂量作为抗生素生长促进剂的预防剂和替代品。这种非常规的植物性补充可能是替代家禽饲料中不必要的抗生素的关键。
The primary goal of this research was to elucidate the novel influence of Brachiaria decumbens supplementation on broiler chicken growth performance, nutritional digestibility, cecal microbiota, intestinal histomorphology, carcass characteristics, and meat quality. A total of 300 male day-old Ross 308 broiler chickens were randomly subjected to six different treatment groups having five replicates per treatment with 10 birds in each replicate. In treatment 1, broiler chickens were fed commercial diets with no added additives; in treatment 2, broiler chickens were offered commercial diets containing 100 mg/kg of the antibiotic oxytetracycline. However, in treatments 3, 4, 5, and 6, broiler chickens received similar commercial diets supplemented with 25 mg/kg, 50 mg/kg, 75 mg/kg, and 100 mg/kg of B. decumbens ground leaf powder, respectively, without antibiotics. Throughout the 42-day trial, the body weight gain and total feed intake for each replicate were recorded every week to determine the growth performance. Then, on 21th and 42nd day, ten broilers from each treatment (two in each replicate) were randomly selected and slaughtered to assess the digestibility of nutrients, histomorphology of the small intestine, the population of the cecal microbiota, carcass characteristics, as well as quality of both breast and drumstick muscle. There were differences (p < 0.05) in the growth performance, apparent ileal nutrient digestibility, intestinal histomorphology, carcass characteristics, and meat quality. Animals supplemented with 25 mg/kg of B. decumbens had higher growth performance and better ileal nutrient digestibility of protein, fiber, and ether extract, as well as higher villi height and carcass percentage with superior meat quality. Besides, the growth of E. faecalis during the starter phase was inhibited. In summary, B. decumbens supplementation at 25 mg/kg may be suggested as an optimal dose of as a prophylactic as well as an alternative for antibiotic growth promoter in stimulating the productivity of commercial broilers. This unconventional phytobiotic supplementation could be the key to replacing unnecessary antibiotics used in poultry feed.