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Lala Lajpat Rai University of Veterinary & Animal Sciences, Hisar

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20131
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Subject: Animal Nutrition × Author: Bagal, Vikrant Laxman ×
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    Comparative efficacy of organic acids and antibiotics as growth promoter in broiler chicks
    (LUVAS, 2013) Bagal, Vikrant Laxman; Khatta, V.K.
    The study was conducted in order to assess effect of organic acids and antibiotic as growth promoter in broiler chicks. A total of 400 commercial straight run broiler chicks were divided into ten groups having four replicates consisting of ten birds each. A corn-soybean-based diet was used as the basal diet (Control). The basal diet was supplemented with organic acid (Citric acid and tartaric acid @ 0.5% and1%, and antibiotic (Chlortetracycline @ 0.0335%) alone or in combination. Significantly higher(P < 0.05) body weight gains were attained in two groups-citric acid(1%)-fed chicks (2553.3gm.) as well as chlortetracycline along with citric acid(1%; 2614.4g) fed chicks as compared to control chicks (2,235.6 g). The antibiotic and organic acid combination -fed chicks showed significantly (P < 0.05) higher body weight gain than control, 0.5% citric acid and tartaric acid (@ 0.5% and1% concentrations) but significantly (P < 0.05)lower than citric acid(1%) and chlortetracycline along with 1% citric acid. Total feed intake was higher in chlortetracycline along with 1% citric as compared to other groups. The addition of 1% citric acid improved feed conversion ratio significantly (P < 0.05) as compared to control group. Supplementation of basal diet with 1% citric acid produced significantly (P < 0.05) higher dressing percentage as compared to basal diet. Other treatments had no significant difference with control and1% citric acid. Basal diet supplemented with antibiotic +1 % citric acid (T4) and 1% citric acid (T6) showed significantly(P<0.05) higher nutrient metabolisability than all other treatment groups. Addition of citric and tartaric acid reduced the pH of upper digestive tract. Significantly (P>0.05) lower total microbial count was observed in T4 (antibiotic +1% citric acid) and T6 (1% citric acid).Cost of production of organic acid supplementation compared to control was highest and considerably higher profit was obtained than that of control. Supplementation of citric acid @ 1% in the diet had positive effects on growth, feed intake, feed efficiency, carcass yield and nutrient metabolisability of broilers. Therefore, citric acid (1%) might be a useful additive instead of antibiotic growth promoters such as chlortetracycline without affecting the performance and health status of broilers.