Standardized amino acid digestibility and true metabolizable energy for several increased protein ethanol co-products produced using back-end fractionation systems

Determination of TMEn, standardized amino acid digestibility, phosphorus digestibility, and phosphorus bioavailability in conventional and reduced phosphorus distillers dried grains with solubles

“…The Ca content was found to be higher for C-DDGS2 compared with C-DDGS1, although, the Ca content was still substantially lower in C-DDGS2 compared with RP-DDGS. The C-DDGS2 contained a P content of 1.14%, which was higher than C-DDGS1 but similar to values reported by Parsons et al (2023a) . The InsP 6 content in C-DDGS2 was high compared with C-DDGS 1 and values reported by Tahir et al (2012) .…”

“…The digestible concentrations of AA were similar between samples; for example, the digestible Lys, Met+Cys, and Thr concentrations were 0.46, 0.92, and 0.83%, respectively, for C-DDGS1 and 0.49, 0.83, and 0.77, respectively, for RP-DDGS. These concentrations are generally similar to what is calculated from the NRC (1994) tables but slightly lower than values reported by Parsons et al (2023a) for C-DDGS.…”

“…The large difference in TME n between the 2 samples is likely due to the higher ash and NDF content and lower CP content in RP-DDGS. The TME n of DDGS can vary widely ( Batal and Dale, 2006 ; Meloche et al, 2013 ), and a recent study evaluating the TME n of C-DDGS reported values ranging from 2,702 to 3,022 kcal/kg DM ( Parsons et al, 2023a ). This is similar to the experimentally determined TME n of RP-DDGS, but lower than C-DDGS1.…”