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Aim:The objective of this study was to evaluate the effect of organic acids as replacer to antibiotics in their various combinations on feed consumption, body weight gain, and feed conversion ratio (FCR) in broiler chicks during different phases of growth.Materials and Methods:Antibiotics and organic acids were incorporated into boiler feed in different combinations to form 10 maize based test diets (T1 to T10). Each test diet was offered to four replicates of 10 birds each constituting a total of 400 birds kept for 45 days.Results:Significantly better effect in terms of body weight gain from supplementation of 1% citric acid and 1% citric acid along with antibiotic was observed throughout the entire study, whereas the effect of tartaric acid supplementation was similar to control group. Citric acid (1%) along with antibiotic supplementation showed highest feed intake during the experimental period. Significantly better FCR was observed in groups supplemented with 1% citric acid and 1% citric acid along with antibiotic followed by antibiotic along with organic acids supplemented group.Conclusion:Growth performance of birds in terms of body weight, body weight gain, and FCR improved significantly in 1% citric acid which was significantly higher than antibiotic supplemented group. 1% citric acid can effectively replace antibiotic growth promoter (chlortetracycline) without affecting growth performance of birds.

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Animal husbandry continues to be an integral part of human life since the start of civilization. Over 65% of the population in India is still living in rural areas and most of them are dependent on agriculture and livestock for their livelihood. Two-third of rural community in India is engaged in livestock rearing. It contributes 4.11% of total GDP and 25.6% of total agricultural GDP of India thus plays a vital role in Indian economy. India has largest buffalo population in the world (108.7 million) and ranks first in the world (1) . Buffaloes contribute more than 50% of the total milk production in India but lactation