EFFECT OF HUMIC ACID AND SELENIUM SUPPLEMENTATION ON IMMUNITY AND PERFORMANCE OF NEWBORN CALVES

Forty newly born male Holstein calves were distributed randomly into four treatments (n=10) to receive no additive (control), Se (2.3mg/head/d), Humic acid (HA, 15 g/head/d), HA + Se (15 g HA+2.3 mg Se/head/d) to evaluate the effect of treatments on calves performance, serum IgG concentration and some blood parameters. Calves received their respective treatments for four consecutive days after birth as treatments were mixed with colostrum and blood samples were taken at 12, 24, 48 and 72 hrs. after birth and biweekly until 75th day of life. Treatment had no effect on ADG, feed intake or weaning weight. Se and or HA had no effect on IgG concentration at 48 hrs. Se treatment increased (P