NE Determination
Body weight gain performance and DMI from both
years were used to estimate the NEm and NEg for both
SBH and DRC, using the iterative model described by
Owens et al. (2002). Calculations were based on final
BW adjusted for a 4% shrink and included performance
data after d 28 only. Calculating NE using the latter
portion of the feeding period reflected BW gain performance
and intake of the calves on full feed. Initial
calculations were adjusted to produce a DRC ME value
similar to the NRC (1996) value for DRC. Net energy
for maintenance values were corrected to produce similar
DRC ME values across years. This maintenance
correction was used to estimate the difference in maintenance
requirements of steers between years.