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Modelling the metabolic characteristics of proteins in dairy cattle from co-products of bioethanol processing: Comparison of the NRC 2001 model with the DVE/OEB system

Citation

Nuez Ortin, W and Yu, P, Modelling the metabolic characteristics of proteins in dairy cattle from co-products of bioethanol processing: Comparison of the NRC 2001 model with the DVE/OEB system, Journal of the Science of Food and Agriculture, 91, (3) pp. 405-411. ISSN 0022-5142 (2011) [Refereed Article]

Copyright Statement

Copyright 2010 Society of Chemical Industry

DOI: doi:10.1002/jsfa.4199

Abstract

BACKGROUND: Co-products from bioethanol processing include wheat dried distillers grains with solubles (DDGS), corn DDGS, blend DDGS (e.g. wheat/corn at 70:30, 60:40 or 50:50 w/w), triticale DDGS, barley DDGS and pea DDGS. The objective of this study was to compare two systems, the DVE/OEB system versus the NRC 2001 model, in modelling the metabolic characteristics of proteins in dairy cattle from different types of co-products (DDGS) from different bioethanol processing plants. RESULTS: The predicted values from the NRC 2001 model were 10% higher (P < 0.05) in truly absorbable rumen-synthesised microbial protein in the small intestine, 10% lower (P < 0.05) in truly absorbed rumen-undegraded feed protein in the small intestine, 30% lower (P < 0.05) in endogenous protein and 2% lower (P < 0.05) in total truly absorbed protein in the small intestine than the predicted values from the DVE/OEB system. However, no significant difference was detected in terms of the degraded protein balance between the two models (P > 0.05). CONCLUSION: The sensitivity of the two models in detecting differences among DDGS types and between bioethanol plants was similar. The two models coincided in the superior protein value of blend DDGS as well as in the more optimal degraded protein balance (DPB) for corn DDGS. Although the differences between the DVE/OEB system and the NRC 2001 model were significant (P < 0.05) for most outputs owing to differences in some of the concepts and factors used in modelling, the correlations between total truly absorbed protein (DVE) and metabolisable protein (MP) values and between degraded protein balances (DPB OEB vs DPB NRC) were also significant (P < 0.05). © 2010 Society of Chemical Industry.

Item Details

Item Type:Refereed Article
Keywords:Bioethanol processing; Co-products; Modelling nutrient supply; Protein metabolic characteristics
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:88706
Year Published:2011
Web of Science® Times Cited:6
Deposited By:Sustainable Marine Research Collaboration
Deposited On:2014-02-12
Last Modified:2014-04-30
Downloads:0

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