Peso e rendimento dos componentes do peso vivo de cordeiros terminados em confinamento com dietas contendo proporções crescentes de resíduo úmido de cervejaria

Abstract

The effect of diets with increasing proportions of wet brewery residue on the weight and proportion of live weight components of feedlot finished lambs was evaluated. Twenty-five non-castrated Texel male lambs were randomly allotted into five groups, consisting in the replacement of the concentrate by wet brewery residue; at the proportions of 0%, 25%, 50%, 75%, and 100%. Diet composition was Tifton-85 hay and concentrate mixture, in a relation roughage:concentrate of 40:60, based on dry matter (DM). The concentrate was composed of ground corn, soybean meal, mineral mix and wet brewery residue, and its proportions varied in accordance with the treatments. There was a linear decrease in weights of blood, legs, head, liver, lungs, and spleen, and liver proportion, with the increase of the proportion of wet brewery residue on the diets. The proportion, in relation to live weight, of rumen/reticulum and of gastrointestinal tract with content, and the gastrointestinal tract content showed a linear increase; while the weights of rumen/reticulum, abomasum, small intestine, and gastrointestinal tract without content showed a linear decrease with the increase of wet brewery residue in the diets. A quadratic effect was observed in the proportion of rumen/reticulum without content. © 2008 Escola de Veterinária UFMG.