OM digestibility, ruminants (gas production)

Organic matter digestibility for ruminants estimated from the volume of gas produced after 24 hour of incubation (GP, ml/200mg DM) and the proportion of crude protein (CP, % DM) as established by Menke and Steingass (1988): OMD (%) = 24.91 + 0.72222 GP + 0.0815 CP