Silagens de rações a base de palma forrageira e capim buffel para ovinos em confinamento

The objective of this study was to evaluate the effect of forage palm based feed silages on nutrient intake, apparent nutrient digestibility, nitrogen and water balance, as well as the bioeconomic performance and etology of lambs in feedlot. 40 crossbred lambs with initial body weight of 18.85 ± 1.2 kg were distributed in five treatments in a completely randomized design with eight replicates. The treatments consisted of feed silages based on forage palm, wheat bran, soybean meal, corn meal, urea and mineral supplement. The nutrient intake presented differences (P 0.05). The performance of the animals had no effect (P> 0.05) with mean values of 180.8 g / animal / day of daily gain, 1.04 kg DM / animal / day for consumption and 6.08 for feed conversion. Diets imposed differences (P <0.05) on all variables of ingestive behavior. The efficiency of feed in relation to MS (g MS / hr) and NDF (g NDF / hr) presented an increase (P <0.05), with a maximum efficiency of 464.45 g / hr and 156, (G ND / hr) and (g NDF / hr) showed an increase (P <0.05) with maximum values of 230.42 g / h and 84 , 55 g / hour for diet 5. The large amount of water present in diets containing palm silage reflects in a higher intake of water via food, reducing the demand of water in the drinking fountain, constituting an important alternative to meet the water needs of animals raised in arid and semi-arid regions. Feeding and rumination efficiencies were positively related to xv total digestible nutrients, although they did not influence the performance of the animals. Although the different proportions of forage palm and Buffel grass of the diets did not interfere in the animal performance, the best economic results were presented by the diet 1.Objetivou-se avaliar o efeito das silagens de rações a base de palma forrageira sobre o consumo de nutrientes, digestibilidade aparente dos nutrientes, balanço de nitrogênio e hídrico, além do desempenho bioeconômico e etologia de cordeiros em confinamento. Utilizou-se 40 cordeiros mestiços, não-castrados, com peso corporal inicial de 18,85±1,2 kg, distribuídos em cinco tratamentos em um delineamento inteiramente casualizado com oito repetições. Os tratamentos consistiram em silagens de ração a base de palma forrageira, farelo de trigo, farelo de soja, farelo de milho, ureia e suplemento mineral.O consumo de nutrientes apresentou diferenças (P0,05). O desempenho dos animais não sofreu efeito (P>0,05) com valores médios de 180,8 g/animal/dia de ganho diário, 1,04 kg MS/animal/dia para consumo e 6,08 para conversão alimentar. As dietas impuseram diferenças (P<0,05) sobre todas as variáveis do comportamento ingestivo. A eficiência de alimentação em relação à MS (g MS/hora) e à FDN (g FDN/hora) apresentaram acréscimo (P<0,05), sendo a eficiência máxima de 464,45 (g MS/hora) e 156,93 (g FDN/hora) pela dieta 5. A eficiência de ruminação em (g MS/hora) e (g FDN/hora) apresentaram acréscimo (P