Animal and Poultry Production Department, Faculty of Technology and Development, Zagazig University, Zagazig, Egypt.
Department of Community Health Sciences, College of Applied Medical Sciences, King Saud University, Saudi Arabia; Nutrition and Food Science Department, Helwan University, Helwan, Egypt.
Poult Sci. 2021 Jan;100(1):84-93. doi: 10.1016/j.psj.2020.04.019. Epub 2020 May 4.
The present investigation aimed to explore the impact of dietary graded levels of 2 types of probiotic bacteria (Bacillus toyonensis [BT] and Bifidobacterium bifidum [BB]) on growth, carcass traits, meat quality, and bacteriology of growing Japanese quail reared under the cage system. One thousand three hundred sixty Japanese quail day-old chicks were randomly divided into 10 groups (8 replicates each). Birds were fed a basal diet (control, T1) and the basal diet plus 0.05, 0.075, 0.10, and 0.125% BT (T2, T3, T4, and T5, respectively), 0.10% BB (T6), and the same previous doses of BT plus 0.05% BB (T7, T8, T9, and T10, respectively). Results showed a significant (P < 0.001) increase in final BW and weight gain because of probiotic supplementation (except T2 for weight gain). Both feed intake and feed conversion ratio did not differ during the overall experimental period (1-42 D of age) except feed intake that was reduced in T2 and increased in T5 and T9 groups. All carcass traits studied were significantly (P < 0.01) affected by probiotics, and the combination between BT and BB in group T8 increased all studied parameters as compared with the other treatment groups. The quail meat color of redness a∗ and L∗ values, thiobarbituric content, cooking loss, proteolysis, and total coliform were decreased (P < 0.001) by probiotic treatment. In general, supplementing BT, BB, or their combination to the basal diet delayed the proliferation of pathogenic bacteria in the diet and intestine. Using BT and BB as feed supplements enhanced growth performance and meat quality of quails as well as diminished pathogenic bacteria proliferation in their diet and intestine. As per our results, we can recommend the application of T5 and T8 to T10 levels for the best performance, carcass traits, and meat quality of growing quails.
本研究旨在探讨 2 种益生菌（Bacillus toyonensis [BT]和Bifidobacterium bifidum [BB]）的日粮梯度水平对笼养生长日本鹌鹑的生长、胴体特性、肉质和细菌学的影响。1360 只 1 日龄日本鹌鹑雏鸡被随机分为 10 组（每组 8 个重复）。鸟类饲喂基础日粮（对照，T1）和基础日粮+0.05%、0.075%、0.10%和 0.125% BT（T2、T3、T4 和 T5），0.10% BB（T6）和相同剂量的前 BT 加 0.05% BB（T7、T8、T9 和 T10）。结果表明，由于益生菌的补充，最终 BW 和体重增重显著增加（除 T2 体重增重外）。在整个实验期间（1-42 日龄），饲料摄入量和饲料转化率均无差异，除 T2 组的饲料摄入量减少和 T5 和 T9 组的饲料摄入量增加外。研究的所有胴体特性均受益生菌显著影响（P < 0.01），与其他处理组相比，T8 组中 BT 和 BB 的组合增加了所有研究参数。与对照组相比，T8 组的鹌鹑肉红色 a∗和 L∗值、硫代巴比妥酸含量、蒸煮损失、蛋白水解和总大肠菌群均降低（P < 0.001）。总的来说，在基础日粮中添加 BT、BB 或它们的组合可以延迟日粮和肠道中致病菌的增殖。使用 BT 和 BB 作为饲料添加剂可以提高鹌鹑的生长性能和肉质，并减少其日粮和肠道中致病菌的增殖。根据我们的结果，我们可以推荐 T5 和 T8 组添加到 T10 组，以获得最佳的生长性能、胴体特性和肉质。
