Efeito da suplementação da silagem de sorgo sobre a digestibilidade de nutrientes e a retenção de nitrogênio
Palavras-chave:
suplementação de concentrados, digestibilidade de nutrientes, silagem de sorgo, balanço de nitrogênio, coeficiente de digestibilidadeResumo
The effect of supplementing sorghum silage with concentrate containing different levels of crude protein was studied using 24 sheep mantained in metabolism cages in a randomized design. Dry matter intake, apparent digestibility and nitrogen retention were measured using conventional methods. Silage was offered with or with out one of the following supplements: ground ear corn, or a concentrate mixture containing 10; 15; 20 or 25% crude protein. The concentrate mixtures were prepared with ground ear corn and soybean oil meal.
Results indicated that dry matter intake was significantly higher (P < 0,05) when the silage was supplemented with concentrate containing 15% crude protein. This treatment also resulted in the highest nitrogen balance (P < 0,05), probably because of the best equilibrium between nitrogen and energy of the ration.
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