The effect of thermal processing and enzyme treatments of soybean meal on growth performance, ileal nutrient digestibilities, and chyme characteristics in broiler chicks

Poultry Science
G J MarsmanA G Voragen

Abstract

Effects of thermal processing (toasting or extrusion) of untoasted soybean meal on growth performance, apparent ileal nutrient digestibilities, and chyme characteristics were studied in broiler chicks fed diets with soybean meal as the main protein source. Effects of increasing shear forces during extrusion as well as enzyme treatments (protease and carbohydrase) were also studied. When compared with toasting, extrusion significantly improved feed conversion ratio (1.56 vs 1.62) and apparent ileal digestibilities of CP and nonstarch polysaccharides (87.5 vs 82.2% and 26.7 vs 11.4%, respectively). Enzyme treatment improved apparent ileal digestibility of CP and nonstarch polysaccharide compared with no enzyme treatment (85.2 vs 83.7% and 20.6 vs 14.5%, respectively); however, enzyme treatments did not result in a better growth performance of the chicks. Among the enzyme treatments, no differences were found in growth performance and apparent ileal CP digestibility, whereas the carbohydrase significantly improved apparent ileal nonstarch polysaccharide digestibility compared with the other enzyme treatments. Extrusion of SBM at the highest shear level caused a significant increase in the water-holding capacity, chyme viscosity, a...Continue Reading

Citations

May 10, 2013·Journal of Animal Physiology and Animal Nutrition·F C SáA C Carciofi
Aug 5, 2010·Journal of Agricultural and Food Chemistry·Sravanthi P Malaypally, Baraem Ismail
May 11, 2002·British Poultry Science·A KocherJ Broz
Nov 26, 2019·Journal of Animal Physiology and Animal Nutrition·Jing HuIn Ho Kim
Dec 1, 2020·Frontiers in Veterinary Science·Hana A H Zakaria, Murad R Ata
Jul 18, 2012·Journal of Agricultural and Food Chemistry·Annemieke M PustjensHarry Gruppen

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