摘要
This experiment was carried out to evaluate the effects of dietary addition of probiotics (Protexin) and prebiotics (active MOS, mannan oligosaccharides) on growth performance, carcasses, and antibody titer in broilers. A total number of 360-day-old Ross broiler chicks were randomly divided into 9 groups in a 3 × 3 factorial arrangement. Nine broiler starter (0–21 d) and finisher (21–35 d) diets were formulated by using 3 levels of probiotics (0, 1, and 2 g/kg of feed) and 3 levels of MOS (0, 1, and 1.5 g/kg of feed) and were randomly allotted to 9 groups. Feed intake was not affected by interaction of treatments during all phases (P > 0.05). Feed intake was improved due to the main effect of probiotic (P = 0.0001) or MOS (P = 0.005). No interaction (P > 0.05) was observed for weight gain in the starter, finisher, and overall phases. While, during the starter and finisher phases, weight gain was increased by probiotics (P = 0.028 or 0.04, respectively). Dietary supplementation of MOS improved weight gain (P = 0.01) and feed conversion ratio (FCR) (P = 0.03) during the overall period, but during starter and finisher periods, weight gain and FCR were not affected by prebiotics. Apart from dressing percentage, no interaction or individual effect of probiotics and prebiotics was observed for carcass, breast, thigh, heart, liver, and gizzard weight. Antibody titer for infectious bursal disease (IBD) was improved (P = 0.026) by the interaction effect between probiotics and prebiotics, when compared with the control group. Antibody titer against Newcastle disease (ND) was not affected by probiotics or prebiotics or their interactions (P > 0.05). It could be concluded that supplementation of prebiotics or probiotics can improve the growth performance of broilers. It may also be helpful in improving the antibody titer against IBD in broilers fed antibiotic-free diets.
摘要译文
本实验旨在评估日粮中添加益生菌（Protexin）和益生元（活性MOS，甘露寡糖）对肉鸡生长性能、,体和抗体效价的影响。将360天大的罗斯肉鸡小鸡按3×3因子排列方式随机分为9组。通过使用3种水平的益生菌（0、1和2 g / kg饲料）和3种水平的MOS（0、1和3）配制九种肉仔鸡的起步日粮（0-21 d）和育成期（21-35 d）。 1.5 g / kg饲料），随机分为9组。在所有阶段，饲料采食量均不受治疗相互作用的影响（P> 0.05）。益生菌（P = 0.0001）或MOS（P = 0.005）的主要作用改善了采食量。起始阶段，最终阶段和整个阶段均未观察到相互作用（P> 0.05）。而在开始阶段和结束阶段，益生菌增加了体重（分别为P = 0.028或0.04）。膳食中添加MOS可以在整个时期改善体重增加（P = 0.01）和饲料转化率（FCR）（P = 0.03），但是在起初和育肥阶段，增重和FCR不受益生元的影响。除敷料百分比外，for体，乳房，大腿，心脏，肝脏和g的重量均未观察到益生菌和益生元的相互作用或个体作用。与对照组相比，益生菌和益生元之间的相互作用提高了传染性法氏囊病（IBD）的抗体效价（P = 0.026）。益生菌或益生元及其相互作用不影响针对新城疫（ND）的抗体效价（P> 0.05）。可以得出结论，补充益生元或益生菌可以改善肉鸡的生长性能。这也可能有助于改善饲喂无抗生素饮食的肉鸡对IBD的抗体效价。
A.Rehman[∗];M.Arif[∗];N.Sajjad[∗];M.Q.Al-Ghadi[†];M.Alagawany[‡];M.E.Abd El-Hack[‡];A.R.Alhimaidi[†];S.S.Elnesr[§];B.O.Almutairi[†];R.A.Amran[†];E.O.S.Hussein[#];A.A.Swelum[#][‖‖]. Dietary effect of probiotics and prebiotics on broiler performance, carcass, and immunity[J]. Poultry Science, 2020,99(12): 6946-6953