Quantidade de ração e níveis de proteína sobre o desempenho de suínos em terminação

An experiment using 216 finishing Landrace x Large White barrows and crossbred gilts was conducted to determinate the effects of three quantities of rations: high level (9.28 Mcal DE/day), medium level (8.53 Mcal DE/day) and low level (8.16 Mcal DE/day), and two crude protein levels (16% and 13% PB). During the growing period all pigs received the same diet (16% PB, 3.35 Mcal DE/kg) ad libitum. During the finishing period starting at 59.76 ± 0.29 kg a randomized block design was utilized. Average daily gain (ADG decreased from medium to low scale (P0.05). The 16% PB level was better than 13% PB for ADG. An interaction (P0.05) were observed on the carcass trait but protein levels promoted significant differences (P0,05). O nível de 16% de PB, comparado com 13% de PB, melhorou o GPDM. Houve interação significativa (P0,05); porém, os níveis protéicos proporcionaram diferenças significativas. (P<0,05) sobre as mesmas. As fêmeas apresentaram carcaças com menos gordura e maior comprimento de carcaça (CC) e área de olho de lombo (AOL) do que os machos castrados (P