CASE STUDY: In situ determination of protein digestibility of dried distillers grains containing 3 lipid concentrations using a mobile bag method

Abstract

Ethanol producers remove lipid from distillers grains (DG) (54.5, 54.8, and highlipid DG, respectively) 80.4, and 80.6 ± 2.0%, respectively)

Ruminal degradation and intestinal digestibility of protein and amino acids in high-protein feedstuffs commonly used in dairy diets

“…In vivo data suggest that the RDP of conventional distillers grains is 37% . Meyer et al (2012) attributed the increase in ruminal degradation of CP in LFDG to an increase in the soluble CP fraction in the distillers solubles as fat is removed; however, in practice, removal of fat does not result in greater production of solubles; therefore, the high ruminal degradation of CP observed in this study could be related to washout of particles from the bags.…”

Changing distillers grains: implications for cattle performance and management

“…The variation could be attributed to nutrient composition of the DG used in the studies and laboratory techniques. While the DG samples in the study by Meyer et al (2013) ranged from 29%−32% CP, the CP of DG used by Mjoun et al (2010) ranged from 30%−42%, which may have impacted protein digestibility.…”

“…For example, in general, corn oil results in a greater depression in fiber digestibility compared to coproducts of the ethanol industry such as DG and CCDS when supplying equivalent dietary fat. Meyer et al (2013) conducted an in situ study to evaluate the protein digestibility of DDGS at 3 fat concentrations (5.5%, 8.4%, and 12.5% fat). Nitrogen digestibility was not different between the 3 concentrations of fat and averaged 63%.…”