Abstract: The experiment was conducted in Chittagong for 35 days long period to find out the performance of broilers fed with different feed additives by using 240 days old COBB-500 broiler chicks. The experimental chicks were reared with proper management including brooding, feeding, watering, housing and maintaining bio-security and data regarding performance were recorded weekly. The cumulative feed intake was the highest forcitric acidgroup (3028.0±1.5 g/bird) which varied significantly (p<0.05) among control (2940.50±5.1 g/bird), antibiotic (3004.75±2.9 g/bird) and probioticsgroup (3015.50±4.8 g/bird) for whole experimental period. Significantly (p<0.05) highest values were found with citric acid in live weight (1791.0±2.1 g/bird) and weight gain (1740.50±3.1 g/bird), followed by (1723.75±3.0 g/bird) and (1673.50±4.1 g/bird) in probiotics, respectively. The best Feed Conversion Ratio (FCR) was found in citric acid group (1.74±0.0) followed by probiotics (1.80±0.0), antibiotic (1.82±0.0) and control group (1.90±0.0). It may be concluded from the experiment that citric acid can be used as a better alternative growth promoter to antibiotics in poultry production.
M.A. Asgar, M.S.I. Khan, M.R. Haque, A.S.M.G. Kibria and M.R. Begum, 2013. Effects of Citric Acid, Antibiotic Growth Promoter and Probiotics on Growth Performance of Broiler. Veterinary Research, 6: 88-93.