High-Protein Distillers Dried Grains with Solubles Produced Using a Novel Front-End-Back-End Fractionation Technology Has Greater Nutritional Value Than Conventional Distillers Dried Grains with Solubles When Fed to Growing Pigs

Two experiments were conducted to determine digestibility of AA, GE, and concentration of DE and ME in conventional distillers dried grains with solubles (DDGS-CV) and in high-protein distillers dried grains with solubles (DDGS-HP) that was produced by Lincolnway Energy, Nevada, IA under the name PureStream Protein™. In Exp. 1, 18 barrows (initial BW: 72.5 ± 9.2 kg) with a T-cannula installed in the distal ileum were allotted to a completely randomized design with 3 diets and 6 replicate pigs per diet. A N-free diet and 2 diets containing DDGS-CV or DDGS-HP as the sole source of CP and AA were formulated. Diets were fed to pigs for 7 d and ileal digesta were collected on d 6 and 7. A greater (P < 0.05) SID of some AA was calculated for DDGS-HP compared with DDGS-CV (Table 1). In Exp. 2, 24 barrows (initial BW: 52.8 ± 2.6 kg) were housed individually in metabolism crates and randomly allotted to 1 of 3 diets. A corn-based basal diet (97.25% corn) and 2 diets that contained corn and DDGS-CV or corn and DDGS-HP were formulated. Feces and urine were collected for 5 d following a 7-d adaptation period. The DE and ME in DDGS-HP on an as-fed basis were greater (P ≤ 0.05) than in corn and DDGS-CV, but the ATTD of GE in DDGS-HP and DDGS-CV were less (P ≤ 0.01) than in corn. In conclusion, the SID of some AA and the concentrations of DE and ME in DDGS-HP is greater than in DDGS-CV when fed to growing pigs.

Table. Digestibility and energy concentrations in DDGS-HP and DDGS-CV.

	DDGS
Item	DDGS-HP	DDGS-CV	SEM	P-value
SID of Lys, %	76.2	69.5	1.7	0.020
SID of Met, %	87.2	83.3	1.1	0.026
SID of Phe, %	85.5	81.8	1.0	0.022
ATTD of GE, %	77.8	75.3	2.1	0.001
DE, kcal/kg	3,826	3,568	83	0.008
ME, kcal/kg	3,698	3,426	87	0.023