Uso de adsorventes em dietas para frangos de corte

Abstract

Two studies were conducted to evaluate the addition of different types of adsorbents in diets containing corn contaminated by mycotoxins (fumonisins B1 and B2 in 721 and 257 ppb total of 978 ppb and 94.7 ppb in Cyclopiazonic acid). Two experiments were occurring simultaneously, a metabolism and another performance with broilers Ross in a randomized design. These experiments occurred in order to test the effect of three types of adsorbents with the treatments distributed as follows: T1: reference diet with corn considered adequate (control), T2: diet with naturally contaminated maize considered inappropriate, T3, T4 and T5 were more T2 addition of adsorbents A, B and C, respectively. In the diets were analyzed found fumonisins, the total quantities of 125, 509, 677, 589 and 625 ppb for T1, T2, T3, T4 and T5, respectively. In the first study used 180 birds were housed in metabolic cages divided into five treatments and six replicates to evaluate the apparent metabolizable energy and apparent metabolizable energy corrected for nitrogen balance and metabolizability coefficient of dry matter, crude protein and gross energy. No statistical difference was detected for these variables. In the second study we used 360 broiler chicks during the period 1 to 42 days of age housed in pens with wood shavings bedding, distuibuídos in five treatments and six replications with 12 birds per replicate. We evaluated the feed intake, weight gain, feed conversion, carcass weights and percentages, cuts, offal and serum biochemical parameters. The results showed significant differences in feed conversion in the final period. But the amount of mycotoxins present in feed birds offered was not enough for there to be poisoning birds and incurs a significant effect of supplementation of the diets of these animals adsorbents.