Nutrient utilization in working bullocks maintained on different plane of nutrition

Non-descript bullocks (12; 200–300 kg BW) randomly divided into three equal groups and were fed either as per Sen et al. (1978) feeding standard 100 (T₀), 125 (T₁) and 150% (T₂) higher level. Daily dry matter intake differs non-significantly between the groups. Digestibility of CP, EE and CF were significantly (P<0.05) higher in feeding 150% level over control. The DCP intake, nitrogen and phosphorus balance were significantly (P<0.05) high by feeding higher level of concentrate mixture. Significant (P<0.05) difference was observed between animals of group T₀ and T₂ with respect to urinary energy loss, metabolizable energy and metabolizable energy for work. Conversion efficiency of gross energy to digestible energy, gross energy to metabolizable energy showed significant (P<0.05) difference between group T₀ and T₂.