One experiment was carried out to evaluate the partial substitution of soybean meal (FS) by others byproducts from soybean, obtained by different kinds of processing, as well as to compare these byproducts among themselves, as a protein source in the diets for piglets weaned at 21 days of age. With this aim, four treatments were compared: T1 - control diet, in which soybean meal was the only protein source; T2, T3 and T4 - 50% of the FS from control diet was substituted by full-fat extruded soybeans (SIE), texturized soybean protein (PTS) and concentrated soybean protein (PCS), respectively. Diets fed during 14 days post-weaning were isocaloric, isolisinic and containing the same level of dairy products, and they were fed from the weaning time up to 14 days after. Partial substitution of FS by whatever evaluated byproducts improved the average daily gains (GPD), average daily intake (CRD) and feed: gain (CA) in the feeding period of the diets. In the total nursery period, partial substitution of FS improved GPD and CRD, however CA was not affected. Incidence of diarrhea and intestinal mucous morphology were not affected by the different soybean byproducts. Substitution of 50% of FS by SIE, PTS or PCS in the weaning diet, promoted better performance, with additional 1 to 2 kg of body weight gains per piglet at the end of the nursery phase. Utilization of SIE, PTS and PCS as partial substitute of FS provided a similar response in the performance of piglets weaned at 21 days of age.
concentrated soybean protein; full-fat extruded soybeans; intestinal morphology; performance; soybean meal; texturized soybean protein
