Nutrient profile and availability of co‐products from bioethanol processing

• Published in: Journal of animal physiology and animal nutrition 2012-06, Vol.96 (3), p.450-458
• Main Authors: Azarfar, A, Jonker, A, Hettiarachchi‐Gamage, I. K, Yu, P
• Format: Article
• Language: English
• Subjects: animal performance; Animals; batch; bioethanol; bioethanol co-products; Biofuels - analysis; Carbohydrate Metabolism; Carbohydrates - chemistry; Cattle; chemical profiles; corn; crude protein; dried distillers grains with solubles; Ethanol - chemistry; Ethanol - metabolism; ethanol production; Female; neutral detergent fiber; nutrient availability; nutrient variability and availability; nutrients; Nutritive Value; organic matter; Proteins - chemistry; Proteins - metabolism; rumen; Rumen - metabolism; ruminants; starch; sugars; Triticum - chemistry; true protein; wheat; wheat and corn blend; Zea mays - chemistry
• ISSN: 0931-2439; 1439-0396
• DOI: 10.1111/j.1439-0396.2011.01163.x

Bioethanol production in North America has led to the production of considerable quantities of different co‐products. Variation in nutrient profiles as well as nutrient availability among these co‐products may lead to the formulation of imbalanced diets that may adversely affect animal performance. This study aimed to compare three types of dried distiller’s grains with solubles [100% wheat DDGS (WDDGS); DDGS blend1 (BDDGS1, corn to wheat ratio 30:70); DDGS blend2 (BDDGS2, corn to wheat ratio 50:50)] and their different batches within DDGS type with regard to: (i) protein and carbohydrate sub‐fractions based on Cornell Net Carbohydrate and Protein System (CNCPS); (ii) calculated energy values; and (iii) rumen degradation of dry matter (DDM), organic matter (DOM), crude protein (DCP), neutral detergent fibre (DNDF) and starch (Dstarch) at 36 and 72 h of ruminal incubations. Wheat DDGS had a lower intermediately (PB2, 136.4 vs. 187.4 g/kg DM) and a higher slowly degradable true protein (PB3, 142.2 vs.105.3 g/kg DM) than BDDGS1, but similar to those of BDDGS2. Sugar (CA4) was higher, whereas starch (PB1) and digestible fibre (PB3) were lower in WDDGS than in BDDGS1 and BDDGS2. All carbohydrate sub‐fractions determined differed significantly between the two batches of BDDGS2. The BDDGS2 had the highest calculated energy values (TDN, DE3×, ME3×, NEL3×, NEm and NEg) among the three DDGS types. The energy values were slightly different between the batches of the three DDGS types. At all incubation times, wheat DDGS had a significantly higher (p