الخلاصة

The current study aimed to investigate the possible effects of probiotic (BioSB-Gold)addition and humic acid both alone or together to broiler diets and determine the effects on physiological traits and immunity in broiler chicks. 120 one day of age and unsexed chicks (class Ross) were used with average weight of 47.7 gm/ chick. The chicks were reared in closed enclosuredivided of pens (3m2/pen) and chicks distributed randomly inside pens. Four treatments were used: T1(standard diet), T2 (standard diet with 1gm probiotic/ kg feed), T3(standard diet with 1gm humic acid/ kg feed) and T4(standard diet with 1gm of probiotic and 1 gm of humic acid/ kg feed). 30 chicks were (3 replicates) were used for each treatment and experiment continue to 5thweek of age. Results showed no significant differences in hemoglobin and the level of directed antibodies against Newcastle and Gambaro diseases while a significant enhancement in the chicks that fed on diets with probiotic and humic acid both alone or together in PCV, WBC and RBC.