Department of Agricultural, Environmental and Food Sciences, University of Molise, 86100 Campobasso, Italy.
Department of Animal Biochemistry and Biotechnology, UTP University of Science and Technology, 85-084 Bydgoszcz, Poland.
Poult Sci. 2018 Aug 1;97(8):2979-2987. doi: 10.3382/ps/pey149.
Elimination of antibiotic growth promoters from poultry production has encouraged intensive search for relevant alternatives. Prebiotics are proposed as efficient replacements to stimulate colonization/expansion of beneficial microflora in chickens. The aim of this study was to deepen the knowledge on the effect of prebiotic administration on slaughter performance and meat quality traits of broiler chickens by evaluating different routes of their delivery (in ovo vs. in-water vs. in ovo + in-water). At d 12 of incubation, 1,500 eggs (Ross 308) containing viable embryos were randomly allotted into 4 groups and injected in ovo with 0.2 mL solution containing: 3.5 mg/embryo BI (Bi2tos, trans-galactooligosaccharides); 0.88 mg/embryo DN (DiNovo, extract of Laminaria spp.); 1.9 mg/embryo RFO (raffinose family oligosaccharides) and 0.2 mL physiological saline (C). All prebiotics increased final BW compared to C group (P < 0.01), irrespective of delivery route. The prebiotics injected in ovo (T1) or in ovo combined with in-water supplementation (T2) increased carcass weight as compared with in-water group (T3), while T3 had the lowest carcass yield compared to the other groups. All prebiotics increased breast muscle weight and yield (P < 0.01), as well as fiber diameter (P < 0.05). Ultimate meat pH was lower (P < 0.01) in T3 than in T2 group. Meat from chickens treated with prebiotics showed a lower redness index, while lightness and yellowness were not affected by the treatments. Saturated fatty acid (SFA), polyunsaturated fatty acid (PUFA) and n-3 fatty acids contents were higher (P < 0.01), and monounsaturated fatty acid (MUFA) level was lower (P < 0.01) in prebiotic groups compared with C group. Nutritional indexes (n-6/n-3, PUFA/SFA ratio and thrombogenic index) displayed favorable human health-promoting values in the meat of chickens which were treated with prebiotics, irrespective of delivery route. Muscle cholesterol content was not affected by prebiotics. In conclusion, this study has shown that prebiotics can exert positive effects on growth of broiler chickens, carcass and meat quality traits, irrespective of delivery route.
抗生素生长促进剂从家禽生产中的消除促使人们积极寻找相关替代品。益生元被提议作为有效的替代品，以刺激有益微生物在鸡中的定植/扩张。本研究的目的是通过评估不同的给药途径（胚内、胚外+胚内、胚外+胚内），深入了解益生元给药对肉鸡屠宰性能和肉质特性的影响。在孵化第 12 天，1500 枚（罗斯 308）含有活胚胎的鸡蛋被随机分为 4 组，并通过胚内注射 0.2 mL 溶液，其中含有：3.5 mg/胚胎 BI（Bi2tos，半乳糖寡糖）；0.88 mg/胚胎 DN（DiNovo，裙带菜提取物）；1.9 mg/胚胎 RFO（棉子糖家族低聚糖）和 0.2 mL 生理盐水（C）。与 C 组相比，所有益生元均增加了最终体重（P < 0.01），而与给药途径无关。与胚外组（T3）相比，胚内注射（T1）或胚内注射联合胚外补充（T2）增加了胴体重，而 T3 的胴体产率最低。所有益生元均增加了胸肌重量和产率（P < 0.01），以及纤维直径（P < 0.05）。与 T2 组相比，T3 的最终肉 pH 值较低（P < 0.01）。用益生元处理的鸡肉红色指数较低，而亮度和黄色度不受处理影响。与 C 组相比，饱和脂肪酸（SFA）、多不饱和脂肪酸（PUFA）和 n-3 脂肪酸含量较高（P < 0.01），单不饱和脂肪酸（MUFA）水平较低（P < 0.01）。无论给药途径如何，用益生元处理的鸡的肉中，营养指数（n-6/n-3、PUFA/SFA 比和血栓形成指数）均显示出有利于人体健康的数值。肌肉胆固醇含量不受益生元影响。总之，本研究表明，益生元可以对肉鸡的生长、胴体和肉质特性产生积极影响，而与给药途径无关。
