Adjustment of the ME requirement for maintenance for acclimatization
As an example, with a MTNZTEMP of 20° C the maintenance ME requirement would be 8.3 kJ/kg BW0.75 lower with a PREVTEMP of 22° C and 8.3 kJ/kg BW0.75 higher with a PREVTEMP of 18° C. The adjustment factor has a unit of MJ/kg BW0.75 and, thus, is multiplied by kg BW0.75, with the product added to the maintenance ME requirement.
Sources used (discussion and recommendations) for this calculation method are:
NRC. 2000. Nutrient Requirements of Beef Cattle, Update 2000. National Academy Press, Washington, DC.
Sahlu, T., A. L. Goetsch, J. Luo, I. V. Nsahlai, J. E. Moore, M. L. Galyean, F. N. Owens, C. L. Ferrell, and Z. B. Johnson. 2004. Nutrient requirements of goats: developed equations, other considerations and future research to improve them. Small Ruminant Research 53:191-219.