EFFECT OF ADDING VITAMIN C TO DRINKING WATER IN THE PHYSIOLOGICAL AND PRODUCTIVE PERFORMANCE OF BROILER CHICKENS REARED UNDER HIGH TEMPERATURE

400 of unsexsd chickens (Fawbro) at 22 days old were used to study the effect of adding vitamin c to Drinking water on some physiological and productive performance of broiler reared under high environmental temperature 36o C for eight hours daily . Four treatment were used as follows : T1 Control No vitamin c added , T2 Adding 100mg vitamin cLiter water , T3 Adding 150mg vitamin cLiter water , T4 Adding 200mg vitamin cLiter water, feed and water were Ad Libitum . Statistic analysis showed that adding vitamin c resulted in significant increase P 0.5 in average body weight , relative growth rate , feed consumption , R.B.C. numbers , Hb concentration . Significant decrease P 0.5 in Glycogen concentration in Liver and Heart , Blood glucose level ,P.C.V.volume and water consumption .No significant differences were showed in Dressing percentage .