Table 6.
Variability of VFA and energy production during in vitro fermentation of corn distiller's dried grains with solubles (DDGS) using pig fecal inocula
| Item | Mean | Range | SD |
|---|---|---|---|
| VFA production, mmol/g DM of fermented substrate1 | 6.4 | 5.6–7.5 | 0.6 |
| Energy production, cal/g DM of fermented substrate2 | 1,781.4 | 1,561.7–2,106.3 | 169.6 |
| Energy production from corn DDGS, cal/g DM | 789.0 | 627.6–962.1 | 106.3 |
| Energy from VFA: DE3 of corn DDGS, % | 21.7 | 17.2–27.3 | 3.1 |
| Energy from VFA: ME3 of corn DDGS, % | 23.1 | 18.3–28.9 | 3.3 |
1
Fermented substrate was the hydrolyzed residue from pepsin and pancreatin hydrolysis (Jha et al., 2015).
2
Fermented substrate was the hydrolyzed residue from pepsin and pancreatin hydrolysis (Christensen et al., 1999).
3
DE and ME values from 12 samples were previously determined by Kerr et al. (2013), and another 4 samples were based on published values from the Nutrient Requirements of Swine (NRC, 2012) for corn DDGS containing > 6% and < 9% ether extract (3,396 kcal ME/kg and 3,582 kcal DE/kg) and corn DDGS containing > 10% ether extract (3,434 kcal ME/kg and 3,620 kcal DE/kg).