RESEARCH INTO THE USE OF DIETARY NITROGEN BY GROWING AND FATTENING STEERS IN RELATION TO DIET FORMULATION AND ENERGY CONTENT
Keywords:
diets, protein, steers, balanceAbstract
Investigations were done on the use of the dietary nitrogen by fattening steers
between 300-450 kg using the method of in vivo nutrient digestibility and nitrogen
balance. Alfalfa and corn-based diets were used, in different forms of preservation
and with different ratio of the bulk forage to the concentrate feeds; diet digestibility
expressed as organic matter and protein varied between 72-76% and between 66-
75% respectively; the best performance produced by the corn silage diets were
observed in diet 2 (with ammonia), while the best results produced by the alfalfa
diets was noticed in diet 5 (haylage); nitrogen balance showed the highest values of
the retained nitrogen in the alfalfa half-hay diet, the alfalfa hay diet having lower
values.
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