The experiment was conducted on extracted (ES) and mechanical soybean meal (MS) in broiler chicken feeding. Three hundred fifty two day old Lohman chickens were placed in four treatments by 4 replicates with 22 chickens in each. Treatments included: 25 or 35% of ES or MS. Higher fiber, fat and gross energy content were obtained in MS than ES. Protein patterns observed by SDS-PAGE showed differences that indicated the specific proteins in ES compared with MS. AME, AMEn, TME and TMEnwere reduced (p<0.05) in MS compared to ES. Feed intake was increased (p<0.05) in starter period (21 d) by ES treatments in comparison to MS treatments. Body weight was (P<0.05) higher in 25% ES in comparison to 25 and 35% MS in grower period (42 d). Feed conversion ratio was improved by 25% of ES compared with 35% of ES treatment (P<0.05) in 21 d. Urease activity (UA) in ES was lower than in MS. It is concluded that ES, as compared to MS, improved broiler performance.
Protein pattern, urease activity, soybean meal, chicken performance
