Influence of Different Levels of Energy and Protein Diets on Immunity Status of Swarnadhara Grower Parent Stock

Abstract

The present study was designed to standardize the energy and protein levels in diet of Swarnadhara female
parent stock during growing period. An experiment was conducted using 384 Swarnadhara female parent
stock (13–20 weeks age) for 56 days. Four grower mash diets were formulated to inter-relate energy
(2500/2400 kcal ME/kg) with protein (16/15% CP) at variable levels (2500kcal ME/kg/16 % CP –T1;
2500kcal ME/kg/15 % CP –T2; 2400kcal ME/kg/16 % CP –T3 and 2400kcal ME/kg/15 % CP –T4). Birds
were divided into 32 replicates of 12 birds each and the above said four diets were offered randomly to 8
replicate groups. All the experimental birds were maintained under deep litter system with identical
managemental conditions. Serum was separated from the blood collected in two birds of each replication
at every 28-day interval. Results revealed that overall mean antibody titers against Newcastle disease
ranged significantly (P<0.05) from 103 (T2) to 328 (T4). However, pooled mean ELISA titers varied non
significantly (P<0.05) from as low as 6411 (T3) to as high as 7594 (T4). Results concluded that 2400kcal
ME/kg/15 % CP –T4in the diet (T4) tended to enhance the antibody titers against Newcastle disease as well
as against infectious Bursal disease.