Ganho de peso de cordeiros da raça ovina crioula em sistema de confinamento com utilização de farelo de arroz integral

Abstract

According to the increasing in agricultural area and the reduction in farming area, the sheep production confronts a challenge in searching other means of production, whereas in certain seasons of the year the natural fields have nutritional deficiency. A way to decrease costs with feeding is mixing a good animal food using byproducts. This paper has the purpose of evaluating different levels of rice meal inclusion in corn substitution in Crioula’s sheep breed lamb’s diet in feedlots.It was used 22 neutered male lambs with average age of 5 months, selected previously obtaining uniform batches, with inicial weight of 20,45 kg and body condition score of 2,36, arranged randomly in the following treatments: ZERO- animal food with 0% of rice meal inclusion and 50% of forage; FIFTEEN- animal food with 15% of rice meal, and 50% forage; and THIRTY –animal food formulated with 30% of rice meal, and 50% forage. The animals were kept in feedlots, in individual stalls, receiving water ad libitum and the animal food for each treatment, they were fed twice a day, with the consume adjust, according to their daily leftover. The weight gain and body condition score were evaluated every 14 days and the average daily gain was calculated from the succeeding weight differences, divided by the days of interval between the assessments. It was evidenced that, the final average weight varying from 27,342 ± 4,88 kg for group zero, 26,425 ± 4.86 kg for group with 15% of rice meal and 27,142 ± 2,61 kg for the group with 30% of rice meal inclusion. For average daily gain, it was observed means of 0,814 ± 0,40 for group zero, 0,723 ± 0,35 for the batch suplemented with 15% of rice meal and 0,817 ± 0,17 for animals supplemented with 30% of rice meal. The body condition score in the three treatments was: 3,142± 0.69 (zero), 3,187± 0,79 (15%) and 3,428± 0,73 (30%).It had no significant differences between the treatments for weight gain, average daily gain and body condition score (P>0,05). Based in the obtained results it can be concluded that the substitution with rice meal in ruminant’s diet was efficient.