Effectiveness of Oxytetracycline and Tylosin Phosphate on Growth of Broiler Chicken

Le résumé fourni par la source

Antibiotics growth promotors (AGPs) are used for enhancing the growth performance and to reduce harmful effects of bacteria in broiler chicken.These anti-microbial agents are capable of destroying the metabolism of microbes and can alter certain properties of bacterial cellular and metabolic activity which results in impaired growth or death of these bacteria.This study was planned to find out the effect of AGPs in broiler chicken.For the purpose one day old (n=432) broiler chicks were used in the experiment.Nine groups comprising of 48 chicks with 3 replicates of sixteen broiler chicks each were formed for the trial.Control group was kept on basal diet.AGPs (Oxytetracycline and Tylosin phosphate) were supplemented solely and in combinations with different concentration.Chicks were reared in floor pens bedded with saw dust litter, optimal husbandry conditions for broiler rearing were provided to the birds and vaccinations against Newcastle disease and Infectious bursal disease (IBD) were done at 9 th , 19 th and 11 th , 23 rd day, respectively.The results of current study revealed that there was non-significant difference (P>0.05)among treatment groups in feed intake and relative visceral organ weight.Whereas, a significant difference between control and AGPs supplemented groups (solely or combination) were noted in weight gain (WG), feed conversion ratio (FCR) and average daily weight gain (ADWG).Use of AGPs in combinations of OXY-1.0+TP-0.5, OXY-2.0+TP-1.0,OXY-2.0+TP-0.5, OXY-1.0+TP-1.0 had a non-significant difference (P>0.05) for WG, FCR and ADG in starter, finisher and overall rearing phases.However a significant difference (P<0.05) was observed with other groups.It can be concluded from the results of this study that supplementation of antibiotics used in broiler chicks at sub-therapeutic level is beneficial for growth performance parameters.

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