Determining Amino Acid Digestibility of Soybean Meal from South Carolina Soybean Varieties Fed to Broilers

At hatch, 240 male broilers (Ross 308, Aviagen, Sallisaw, OK) were placed in batteries (Petersime Brood Unit, Gettysburg, OH) for a 15-d study to evaluate amino acid digestibility of soybean meal (SBM) from specialty variety soybeans grown South Carolina. There 10 replicates per treatment and 6 cage. Broilers given common corn meal-based diet d 0 9. On 9, weighed, cages allotted 1 4 dietary treatments within location block. Dietary consisted sources varying quality determined by crude protein (CP) content processed into SBM. Two similar region either commercially solvent extracted or experimentally at Texas A&M University. Therefore, SBM with 44% CP (CON) 50% (PCON), 52% (52SBM), 56% (56SBM). Assay diets dextrose SBM-based, formulated supply 20% titanium dioxide as an indigestible marker. 15, euthanized CO2 inhalation ileal samples collected determination apparent (AID) AA. Data analyzed using the GLIMMIX procedure SAS v. 9.4 (SAS Institute Inc., Cary, NC), pen experimental unit, blocking factor adjusted Tukey-Kramer multiple comparisons. fed CON 56SBM had increased (P < 0.003) total AA, Arg, His, Lys, Thr, Trp compared those PCON 52SBM. Digestibility Ile Phe 0.001) 52SBM, while was intermediate Leu all other sources. Met = 0.007) 52SBM there no evidence differences between Val PCON. In conclusion, improved AA region. The high (57% CP)