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Effects of bioethanol plant and coproduct type on the metabolic characteristics of the proteins in dairy cattle

Citation

Nuez Ortin, W and Yu, P, Effects of bioethanol plant and coproduct type on the metabolic characteristics of the proteins in dairy cattle, Journal of Dairy Science, 93, (8) pp. 3775-3783. ISSN 0022-0302 (2010) [Refereed Article]

Copyright Statement

Copyright 2010 American Dairy Science Association®

DOI: doi:10.3168/jds.2010-3143

Abstract

The dramatic increase in bioethanol production in Canada has resulted in millions of tonnes of different types of coproducts: wheat dried distillers grains with solubles (DDGS), corn DDGS, and blend DDGS (e.g., wheat:corn 70:30). The objectives of this study were 1) to investigate the effect of DDGS type and bioethanol plant on the metabolic characteristics of the proteins and the total truly digested and absorbed protein supply to dairy cattle using the DVE/OEB system and 2) to compare the metabolic characteristics of the proteins of original feedstock grains with their respective derived DDGS samples. The results showed that all types of DDGS are a good source of the truly digested and absorbed protein in the small intestine [DVE; 107 vs. 249 g/kg of dry matter (DM) for wheat and wheat DDGS; 108 vs. 251 g/kg of DM for corn and corn DDGS]. According to the DVE/OEB system, the predicted total DVE supply to dairy cattle differed among wheat DDGS (DVE = 249 g/kg of DM), corn DDGS (DVE = 251 g/kg of DM), and blend DDGS (DVE = 281 g/kg of DM) and, to a lesser extent, between the different bioethanol plants (DVE: 277 vs. 230 g/kg of DM for bioethanol plants 1 and 2). The results indicated the superior protein value of blend DDGS as well as that of the more optimum degraded protein balance (DPB) value for corn DDGS (DPB: 11 g/kg of DM in corn DDGS vs. 72 g/kg of DM in wheat DDGS and 55 g/kg of DM in blend DDGS). In addition, differences in the acid detergent-insoluble crude protein content of wheat DDGS samples were reflected in differing protein DVE values. In conclusion, it is inappropriate to assume fixed protein values for DDGS without considering factors such as DDGS type and bioethanol plant origin. © 2010 American Dairy Science Association.

Item Details

Item Type:Refereed Article
Keywords:Bioethanol coproduct; DVE/OEB system; Metabolic characteristic of protein; Protein evaluation
Research Division:Agricultural and Veterinary Sciences
Research Group:Animal Production
Research Field:Animal Nutrition
Objective Division:Animal Production and Animal Primary Products
Objective Group:Other Animal Production and Animal Primary Products
Objective Field:Animal Production and Animal Primary Products not elsewhere classified
ID Code:88688
Year Published:2010
Web of Science® Times Cited:36
Deposited By:Sustainable Marine Research Collaboration
Deposited On:2014-02-12
Last Modified:2014-06-18
Downloads:0

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