Substrate levels, carbohydrate degradation rate and their effects on ruminal end-product formation
Year: 2006
Type: dissertation
Abstract: J., 2006. Substrate levels, carbohydrate degradation rate and their effects on ruminal end-product formation. Doctoral thesis. ISSN 1652-6880, ISBN 91-576-7075-7 New feed evaluation systems for ruminants, based on dynamic-mechanistic models and predictions of production responses to nutrients, demand accurate prediction of end-products formed during rumen fermentation. The aim of the present work was to investigate the effects of levels of different substrates and carbohydrate degradation rates upon ruminal end-product formation. An in vitro method was introduced to evaluate feeds with respect to ruminal starch degradation. The method was based on incubation of feed samples in a buffered rumen fluid solution and a subsequent enzymatic analysis of remaining starch. Heat treatment generally increased rate or extent of starch degradation to glucose. Use of single time point determinations correlated reasonably well with degradation rate estimates and offers the possibility to reduce the cost of analysis. Two experiments with a 23 factorial arrangement of treatments were performed with an in
Author: Jóhannes Sveinbjörnsson
Language: English
Subfield: Animal Science and Zoology
Domain: Life Sciences
SDG: Zero hunger
Open Access status: green
OpenAlex ID: W144474678