Effect of Rumen-Protected Niacin and Vitamin C Additives on Productive Performance of Suckling Friesian Calves Under Heat Stress Condition

This study aimed to evaluate the effect of rumen-protected niacin and vitamin C on suckling Friesian calves' productive performance under heat stress during the summer season. Twenty-four newly born Friesian calves with an average live body weight of 31±0.21 kg is assigned into four comparable groups. Calves were unsupplemented in G1 and served as control, or supplemented with rumen-protected niacin at 2g/head/ day in G2, vitamin C at 2 g/head/day in G3, or rumen-protected niacin at 1 g/head/day plus vitamin C at 1 g/head/day in G4 during suckling period (105 days). Results confirmed that G4 recorded appreciably (P<0.05) the very best digestibility coefficients of all nutrients, feeding values, TVFA’s attention and decrease notably (P<0.05) Ph price and NH3-N awareness accompanied with the aid of G2 and G3, whereas G1 had the different trend. Blood biochemical and hematological values had been substantially (P<0.05) the highest, however, the exercise of liver enzymes (AST & ALT) was appreciably (P<0.05) the lowest in G4 accompanied by using G2 and G3, however, the lowest counts performed in G1. Group four recorded considerably (P<0.05) the very best TDN and DCP intake, weaning weight, whole, and daily weight gain, feed conversion ratio, and financial affectivity accompanied by G2 and G3, alternatively G1 had the lowest values. In conclusion, either rumen-protected niacin or vitamin C and its mixture had an effective role in improving the growth performance of suckling Friesian calves under heat stress.