Suplementação com farelo de arroz integral para cordeiros mantidos em pastagem de azevém (Lolium multiflorum Lam.) e aveia preta (Avena strigosa Schreb.)

Abstract

The state of Rio Grande do Sul has a large deficit for sheep intended for slaughter in autumn-winter period. In addition to alternatives such as introduction of forage species wintry growth, supplementation with use of agro-industrial by-products, the rice bran can be an excellent tool to reduce this seasonal production. Thus, the evaluation of performance across animals supplementation, based on the weight gain and in vivo ratings, could help reduce the slaughter age with supply of animals in the off-season. The objective of this study was to evaluate the performance of Corriedale lambs supplementation with or without rice bran (RB), under grazing in degraded areas of native pasture, with overseeded ryegrass (Lolium multiflorum Lam.) And black oat (Avena strigosa Schreb.). They were used 20 lambs Corriedale castrated male baby tooth and an average age of nine months, with average initial weight of 30.5 kg and average body condition score of 2.5 points. The experimental plots were composed of animals with and without supplementation of 1% of body weight of brown rice bran grazing. The experimental period was 65 days, and made four evaluations in a range of approximately 21 days. The data relating to the performance of animals, showed significant differences (P <0.05) for the final body weight variables (38.3 kg and 35.2 kg), total weight gain (7.9 kg and 4.6 kg), average daily gain (0.121 kg and 0.071 kg), final body condition score (3.4 and 2.9), final body length (58.0 cm and 57.7 cm), end later time (67. 4 cm and 65.1 cm), respectively for the supplemented and non-supplemented batch. Under the conditions presented in this study concluded that supplementation with rice bran, interfered with the performance of lambs Corriedale, the termination period.