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Body Composition and Net Requeriments of Energy and Protein of Supplemented Steers during the Rainny Season

The effects of concentrate supplementation of stocked an during the rainny season on the body composition of energy and protein and net requirements of protein and energy for weight gain were evaluated. Forty-nine crossbred steers, were Brachiaria decumbens pastures, were used. The experiment was driven in three experimental periods, according to a completely randomized design. The following supplements were daily fed at 10 a.m.: mineral salt (SALT), supplements based on corn and soybean meal, with 20% CP, at the level of 1.0 and 2.0 kg (CSBM1 and CSBM2) and supplements based on wheat bran and soybean meal, with 20% CP, at the level of 1.0 and 2.0 kg (WMSBM1 and WMSBM2). The animals submitted to the different treatments showed no differences on composition of weight gain in the protein, fat and energy. The net requirements of protein and energy for an animal with 350 of body weight were, respectively, 220 g and 5.75 Mcal per kg of live weight gain.

body composition; grazing; net requeriments; supplements


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