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Formulation daily rations for growing ruminants (bulls, heifers, lambs, ewes etc.)

Both NEm and NEg are used Energy concentrations of the ration are calculated NEm concentration = NEm of the ratio/d.m. content of the ration (MJ/kg d.m.) NEg concentration = NEg of the ratio/d.m. content of the ration (MJ/kg d.m.)

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Formulation daily rations for growing ruminants (bulls, heifers, lambs, ewes etc.)

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  1. Both NEm and NEg are used • Energy concentrations of the ration are calculated • NEm concentration = NEm of the ratio/d.m. content of the ration (MJ/kg d.m.) • NEg concentration = NEg of the ratio/d.m. content of the ration (MJ/kg d.m.) • Calculating the dry matter content of the ration needed for maintenance (NEm requirement/NEm concentration) (kg) • Calculating the dry matter left for growth (d.m. of ration – d.m. needed for maintenance) • Calculate the NEg left for growth (d.m. left x NEg concentration) (MJ) • Compare NEg left with NEg requirement • Compare also the other nutrient contents (protein, Ca, P) with the requirements • Use mineral supplements if needed Formulation daily rations for growing ruminants (bulls, heifers, lambs, ewes etc.)

  2. Daily ration for a small breed bull, weighing 450 kg, growing 1000 g/day NEm concentration: MJ/kg d.m. (NEm/dm) NEg concentration : MJ/kg d.m. (NEl/dm) dry matter needed for maintenance.: kg remaining for weight gain: kg NE remaining for weight gain: MJ NEg This NEg can result g weight gain

  3. Prepare daily ration for large breed heifers, weighing 350 kg, growing 900 g/day, kept in stall NEm concentration: MJ/kg d.m. (NEm/dm) NEg concentration : MJ/kg d.m. (NEl/dm) dry matter needed for maintenance.: kg remaining for weight gain: kg NE remaining for weight gain: MJ NEg This NEg can result g weight gain

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