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Feeding value of Pacific Northwest-grown soybeans for broilers

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  • Two broiler feeding experiments were carried out to determine the feeding value of Pacific Northwest-grown soybeans. In both experiments, solvent soy­bean meal (SBM) protein, when replaced one to one with extruded soybean (ESB) protein, produced no significant effects on body weight, feed conversion and mortality. Protein from raw soybean (RSB) could replace up to 50 percent of SBM protein in the ration. Higher levels of RSB significantly depressed growth and feed conversion. The supplementation of zinc bacitracin to RSB rations did not overcome the inhibitory effects. Supplementing an additional 0.05 percent methionine in the RSB ration also did not improve growth rate and feed conversion. RSB-fed broilers had significantly (P<0.05) larger pancreata, kidneys and proventriculi than the SBM-fed birds. Only pancreatic weights were affected in ESB-fed birds. Wetter caked floor litter was ob­served in pens that housed broilers fed RSB than either ESB or SBM. Mortality. was greater where high levels of RSB was included in the rations.
  • Published June 1978. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
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