Determination of energy and amino acid digestibility in growing pigs fed corn distillers' dried grains with solubles containing different lipid levels

Abstract

Two experiments were conducted to estimate the digestibility of energy, nitrogen and amino acids (AA) in growing pigs fed diets containing one of five corn distillers' dried grains with solubles (DDGS), including three normal oil DDGS (NO-DDGS) and two low oil DDGS (LO-DDGS) samples. Exp. 1 was conducted to determine the digestible energy (DE) and metabolisable energy (ME) content. Six growing barrows (initial body weight [BW]: 35.1 +/- 2.2 kg) were allotted to a 6 x 6 Latin square design, with six periods and six diets. One diet was a corn soybean meal basal diet and the other five diets were based on corn, soybean meal and 28.8% DDGS. The average DE and ME values for the three NO-DDGS samples were 16.0 and 14.9 MJ/kg dry matter (DM). These values were 9 and 13% greater than the LO-DDGS values of 14.7 and 13.2 MJ/kg DM respectively. Exp. 2 was conducted to determine and compare apparent (AID) and standardised (SID) ileal digestibility for crude protein and AA in the five DDGS samples. Six growing barrows (initial BW, 32.2 +/- 1.9 kg) fitted with a simple T-cannula were allotted to a 6 x 6 Latin square design with six periods and six diets. Five of the diets were based on the five DDGS samples, and the remaining one diet was nitrogen-free diet based on cornstarch and sucrose. Titanium dioxide (0.1%) was used as inert marker. The results of the experiment showed the largest variation among the different samples in AID and SID for lysine (from 41.8 to 65.8% and 53.8 to 73.9% respectively) and threonine (from 54.3 to 73.8% and 65.2 to 79.5% respectively). Also, among the indispensable AA, the SID values for arginine, histidine, threonine and tryptophan observed in LO-DDGS were not different from the values derived from NO-DDGS. In conclusion, LO-DDGS may have decreased energy compared with NO-DDGS because of its lower fat content. However, oil removal during the production of DDGS may not affect amino acid digestibility.

Evaluation of Energy Digestibility and Prediction of Digestible and Metabolisable Energy in Sunflower Seed Meal Fed to Growing Pigs

“…a-c Means within a row without a common superscript letter are significantly different (P<0.05). for DE; 10.30 and 11.55 MJ/kg DM for ME, respectively) were higher than the values published by the National Research Council (2012), may be because of the higher content of EE (Ren et al, 2011). It has been reported that the presence of fibre could increase the endogenous secretions of CP and that fat associated with the increasing microbial mass could lead to a decrease in digestion of CP and fat (Sauer and Ozimek, 1986;Noblet and Perez, 1993).…”

Empiric narrowing of the net energy value of reduced-oil corn distillers’ dried grain with solubles for growing-finishing pigs

“…Generally, DE and ME values of RO-cDDGS were lower than those published for conventional corn DDGS (Stein and Shurson 2009). Our calculated DE and ME values for RO-cDDGS were similar to values given by Ren et al (2011), were higher than values reported by Jacela et al (2011) and Dahlen et al (2011), and were lower than values cited by Kerr et al (2013) and Anderson et al (2012). These researchers fed solvent-extracted corn DDGS with 3.15% crude fat versus 6.7% crude fat in the RO-cDDGS fed in the current trial.…”

“…The majority of US ethanol plants are currently extracting oil from DDGS (Jessen 2013) thereby reducing its dietary energy value. Five studies have been published that determined the DE and ME values of RO-cDDGS (Dahlen et al 2011;Ren et al 2011;Jacela et al 2011;Anderson et al 2012;Kerr et al 2013). Generally, DE and ME values of RO-cDDGS were lower than those published for conventional corn DDGS (Stein and Shurson 2009).…”

“…Corn DDGS has a relatively high fibre content (10% ADF, 30% NDF). Ren et al (2011) showed that reduced-oil (4.1% EE) cDDGS had 4.6 percentage points lower apparent total tract digestibility of GE than conventional cDDGS (9.2% EE). As mentioned by Jacela et al (2011), the decreased apparent total tract digestibility of GE in RO-cDDGS can be due to both lower oil content and the energy dilution effect of its high fibre content.…”

Validation of metabolisable energy prediction equation for de-oiled corn distillers dried grains with solubles fed to finishing pigs

“…Some researchers have evaluated the DE and metabolisable energy (ME) content of corn DDGS (Pedersen et al 2007;Mendoza & Ellis 2010;Ren et al 2011;Anderson et al 2012;Kerr et al 2013), but the number of samples (especially for the de-oiled DDGS) was usually limited. Li et al (2015) determined the ME content of 25 DDGS samples; 10 of them were de-oiled.…”