Department of Animal Nutrition, University of Veterinary and Animal Sciences, Lahore, 54000, Pakistan.
Department of Animal Sciences, University of Veterinary and Animal Sciences, Jhang Campus, Jhang, 35200, Pakistan.
Trop Anim Health Prod. 2020 Nov;52(6):3589-3596. doi: 10.1007/s11250-020-02396-2. Epub 2020 Sep 16.
Organic acids have exhibited great potential as an antibiotic replacement and as an additive work tremendously for health maintenance of broiler chicken. To explore more about organic acids, a total of 900 day-old broiler chicks (Cobb-500) were procured from a local hatchery and distributed into 9 treatment groups having 5 replicates of 20 birds each; duration of the biological trial was of 35 days. Group T1 served as control group without any dietary supplementation. Other groups T2 and T3 were boosted with different levels (125 g/ton and 250 g/ton) of enramycin (antibiotic), T4, T5, and T6 were supplemented with different levels (2 kg/ton, 3 kg/ton, and 4 kg/ton) of ammonium formate and ammonium propionate, and T7, T8, and T9 were fed with different levels (2 kg/ton, 3 kg/ton, and 4 kg/ton) of calcium formate and calcium propionate. The findings declared significant improvement (P < 0.05) in body weight gain and FCR in groups T3, T5, and T9 while feed intake was not affected. Carcass evaluation depicted significantly better (P < 0.05) dressed and eviscerated weight along with carcass yield (T5, T7, T8, T9). Broilers fed organic acid supplemented diet had significantly lower (P < 0.05) total bacterial count (T3, T5, T8, T9) and positively improved (P < 0.05) villi length (T5, T6, T9) as compared with control group. However, total protein, globulin, HDL, and LDL levels were determined to be non-significant (P > 0.05) among different organic acids treatments. Hence, organic acids can be utilized as a better replacement for antibiotics. Supplementation of organic acids at a dose rate of 3 kg/ton and 4 kg/ton is recommended for efficient performance of broilers.
有机酸作为抗生素替代品具有巨大潜力,并且对肉鸡的健康维护有很大作用。为了更深入地研究有机酸,我们从当地孵化场采购了 900 只 1 日龄的肉鸡(科宝 500),将其分为 9 个处理组,每个处理组 5 个重复,每个重复 20 只鸡;生物试验持续 35 天。T1 组作为对照组,不添加任何饲料补充剂。T2 和 T3 组添加不同水平(125g/吨和 250g/吨)的恩拉霉素(抗生素),T4、T5 和 T6 组添加不同水平(2kg/吨、3kg/吨和 4kg/吨)的甲酸铵和丙酸铵,T7、T8 和 T9 组添加不同水平(2kg/吨、3kg/吨和 4kg/吨)的甲酸钙和丙酸钙。结果表明,T3、T5 和 T9 组的体重和饲料转化率显著提高(P<0.05),而采食量不受影响。屠体评估显示,T5、T7、T8 和 T9 组的屠宰和净膛重量以及屠体产率显著提高(P<0.05)。与对照组相比,添加有机酸的饲料组肉鸡的总细菌计数(T3、T5、T8 和 T9)显著降低(P<0.05),绒毛长度显著提高(P<0.05)(T5、T6 和 T9)。然而,不同有机酸处理组之间的总蛋白、球蛋白、高密度脂蛋白和低密度脂蛋白水平没有显著差异(P>0.05)。因此,有机酸可以作为抗生素的替代品。建议在 3kg/吨和 4kg/吨的剂量下添加有机酸,以提高肉鸡的生产性能。