Response of broiler chicks to non-steam- or steam-pelleted diets containing raw, full-fat soybean meal

• Published in: Journal of applied poultry research 2017-06, Vol.26 (2), p.260-272
• Main Authors: Erdaw, M. M., Bhuiyan, M. M., Iji, P. A.
• Format: Article
• Language: English
• ISSN: 1056-6171; 1537-0437
• DOI: 10.3382/japr/pfw070

Abstract The objective of this study was to evaluate the effects of steam pelleting of diets containing graded levels of raw, full-fat soybean meal (RSBM) on the chemical properties and feeding values of the diets. Samples of diets with steam- or non-steam-pelleted as well as the mash containing varying levels of RSBM were subjected to detailed chemical analysis. As a result of this study, trypsin inhibitor (TI) concentrations in the diets ranged between 4,153 and 10,484 TIU/g. Amino acid concentrations were higher in the non-steam-pelleted and mash diets than the steam-pelleted diets. A 4 × 2 factorial arrangement (RSBM: zero, 10, 20 or 30%, equivalent to zero, 30, 60, and 90 g/kg of diet, respectively, and non-steam- or steam-pelleted diets) was used while feeding broiler chicks (zero to 14 d of age). Each treatment was replicated 6 times with 8 birds per replicate. As a result of this study, there was no difference (P > 0.05) in mortality of birds among the groups. Feed intake (FI) (P < 0.05) and body weight gain (BWG) (P < 0.001) decreased with increasing levels of RSBM. Birds fed on steam-pelleted diets gained less (P < 0.001) weight than birds on the non-steam-pelleted diets, but the FI was not significantly (P > 0.05) different. The FCR was negatively affected (P < 0.05) by increasing levels of RSBM. There was no interaction effect between RSBM and pelleting method on the FI, BWG, or FCR of birds. The weight of the pancreas (P