Hasan Md Nazmul, Azad Md Abul Kalam, Rabbani Md Ataul Goni, Yeasmin Tahera, Rashid Md Harun Or
Department of Animal Science, Bangladesh Agricultural University, Mymensingh, Bangladesh.
Poultry Production Research Division, Bangladesh Livestock Research Institute, Savar, Dhaka-1341, Bangladesh.
J Adv Vet Anim Res. 2020 Aug 20;7(3):471-476. doi: 10.5455/javar.2020.g443. eCollection 2020 Sep.
The current research aimed at investigating growth performances and meat yield characteristics of commercial cockerels supplemented with antibiotics and probiotics to the diet.
A total of 1,350 commercial cockerels (ISA Brown) were indiscriminately distributed to 3 treatment groups, each having three replications of 150-day-old chicks based on completely randomized design. The basal diet was treated as the control, while the experimental groups receiving Enrofloxacin 1 gm/kg and Protexin 1 gm/kg feed were considered as antibiotic and probiotic groups, respectively. Bodyweight, feed intake (FI), feed conversion ratio (FCR), and other relevant characteristics were recorded weekly until 49 days of trial. In the end, similar number (10) of birds from each replicate group were slaughtered to determine the carcass characteristics.
Significantly, better results were found in the overall growth performances of the cockerels in the probiotic-fed treatment group. Highly significant differences were also found in live bodyweight, weight gain, daily gain, FI, FCR, survivability, dressing percentage, abdominal fat, breast meat, drumstick, and thigh weight in the probiotic-fed treatment group compared to the others.
The results of the present study indicate that the inclusion of dietary probiotics has a superior performance to antibiotics and may have the potentiality to be used as an alternative growth enhancer in the diet of cockerels.
当前研究旨在调查在日粮中添加抗生素和益生菌的商品肉公鸡的生长性能和产肉特性。
总共1350只商品肉公鸡（ISA Brown品种）根据完全随机设计被随机分配到3个处理组，每组有3个重复，每个重复有150只日龄雏鸡。基础日粮作为对照组，而分别接受1克/千克恩诺沙星和1克/千克普乐泰（Protexin）饲料的实验组分别被视为抗生素组和益生菌组。每周记录体重、采食量（FI）、饲料转化率（FCR）及其他相关特性，直至试验49天。最后，从每个重复组宰杀数量相同（10只）的鸡以确定胴体特性。
显著地，在益生菌喂养处理组的肉公鸡总体生长性能方面发现了更好的结果。与其他组相比，在益生菌喂养处理组的活体重、体重增加、日增重、采食量、饲料转化率、存活率、屠宰率、腹脂、胸肉、鸡腿和大腿重量方面也发现了极显著差异。
本研究结果表明，日粮中添加益生菌比抗生素具有更优性能，并且可能有潜力用作肉公鸡日粮中的替代生长促进剂。
