A NOTE ON THE DIGESTIVE AND METABOLIC NITROGEN-UTILIZATION IN GROWINGPIGS FED HOMEMADE PROTEIN MOLASSES (HPM)

Fifteen hybrid male pigs with a live weight of 45 kg were housed in me tabolism cages and distributed according to a random block design to a nalyse the digestive and metabolic nitrogen utilization. The treatment s consisted of 1) control molasses B + commercial concentrate which su pplied 256 g/day of protein, 2) 50% substitution of concentrate protei n by homemade protein molasses (HPM) and 3) 75% substitution of concen trate protein by homemade protein molasses. The coefficients of digest ive nitrogen utilization (%) were: 1)85.5, 2) 81.0 and 3) 75.4. The ni trogen retained as percentage of consumption in the treatment of 75% s ubstitution differed (P < 0.01) from the rest. It is suggested that it is possible to increase the utilization efficiency of the digestive n itrogen in growing pigs consuming low levels of utilized protein as th ose contributed by HPM.