Determination of the ileal amino acid and energy digestibilities of corn distillers dried grains with solubles using grower-finisher pigs1,2,3

Abstract

An experiment evaluated the ileal apparent and standardized AA and apparent energy digestibilities in grower-finisher pigs of 5 sources of distillers dried grains with solubles (DDGS) from corn. The 5 DDGS sources were analyzed for AA, GE, NDF, ADF, and color score. Diets were formulated to contain 15% CP from the test DDGS sources (approximately 60% of the diet). A low-protein (5% casein) diet was used to estimate basal endogenous AA losses. The experiment was conducted in 2 replicates of a 6 x 6 Latin Square design, with 6 treatments and six 1-wk periods. The experiment used 12 crossbred barrows [(Yorkshire x Landrace) x Duroc], averaging 28 kg of BW and 60 d of age, and surgically fitted with a T-cannula in the distal ileum. After a 10-d recovery period, treatment diets were fed in meal form, initially at 0.09 kg . BW(0.75). Feed intake was equalized between pigs within each period and increased for each subsequent period. Periods included 5 d of diet acclimation followed by two 12-h ileal digesta collections, one on d 6 and one on d 7. Apparent and standardized digestibility of AA was calculated using chromic oxide (0.4%) as an indigestible marker. The results demonstrated that apparent and standardized lysine digestibilities ranged from 24.6 to 52.3% and 38.2 to 61.5%, respectively. Average apparent essential AA digestibility was lower (P < 0.05) in sources 1 and 5, the 2 sources that were darkest in color. Apparent and standardized digestibility of the averaged nonessential AA were lower (P < 0.05) in source 5 than in all other sources. Source 5, the darkest colored DDGS, had a 10% lower (P < 0.05) average apparent and standardized essential AA digestibility and was more than 15% lower (P < 0.05) in lysine digestibility than the 3 lightest colored sources. Apparent ileal energy digestibility did not differ among the 5 sources. Lysine content and digestibility seemed to be reduced to a greater extent by the darker colored DDGS than the other essential AA, suggesting that the Maillard reaction reduced total lysine content and lowered its digestibility. These results, therefore, imply that darker colored DDGS sources may have lower (P < 0.05) analyzed lysine contents, as well as lower (P < 0.05) lysine and essential AA digestibilities, than lighter colored DDGS sources.

Effect of inclusion of distillers dried grains and solubles from barley, wheat and corn in isonutritive diets on the performance and caecal environment of growing rabbits

“…In growing pigs, inclusion of DDGS in the diet has frequently been associated with reduced performance due to lower digestibility and availability of lysine (Fastinger and Mahan, 2006;Stein et al, 2006;Almeida et al, 2011). This was not observed in growing rabbits with our balanced amino acid diets, perhaps due to the digestive particularities of rabbit.…”

The Effect of Corn Distillers Dried Grains With Solubles Inclusion Rate and Bioconversion on the Nitrogen, Phosphorus and Energy Metabolism of Piglets

“…These values are similar to values of 14.43 and 12.71 MJ/ kg of DM in NRC [16], respectively. In some studies [19] it is observed that increasing [5] reported that the energy digestibility has been found to not differ among corn DDGS sources and ranged from 66.7 to 69.2%. However, energy digestibility of DDGS was higher when DDGS was fed in combination with cereal grain instead of cornstarch [11].…”

Wastes from ethanol and biodiesel in animal feed

“…Para suínos, por exemplo, o coeficiente de digestibilidade verdadeira dos DDGS de milho varia entre 43,9 e 63,0% (STEIN et al, 2006). Fastinger & Mahan (2006) Londrina, V. 7, N. 18, Ed. 241, Art.…”

“…241, Art. 1593, Setembro, 2013 A cor do DDGS tem correlação com a digestibilidade de aminoácidos, pois os DDGS com coloração mais escura apresentaram valores menores de digestibilidade (FASTINGER & MAHAN, 2006). Pedersen et al (2005) consideram que os parâmetros de cor, brilho e intensidade do amarelo, são indicadores razoáveis para prever o conteúdo de lisina digestível em DDGS.…”

“…Segundo Fastinger & Mahan (2006) para fibra detergente neutra (FDN) enquanto que Pedersen et al (2007) constataram 27,6%. Devido ao aumento de FDN e/ou dos níveis de gordura na dieta ocorre redução linear na digestibilidade aparente da gordura (NOBLET & PEREZ, 1993).…”