Integration of Ruminal Volatile Fatty Acid Production Methods, Ruminal Fluid Sampling Techniques, and Mathematical Modeling
Corley, Robert Nelson, III
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https://hdl.handle.net/2142/83657
Description
Title
Integration of Ruminal Volatile Fatty Acid Production Methods, Ruminal Fluid Sampling Techniques, and Mathematical Modeling
Author(s)
Corley, Robert Nelson, III
Issue Date
1999
Doctoral Committee Chair(s)
Murphy, Michael R.
Department of Study
Animal Sciences
Discipline
Animal Sciences
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Agriculture, Animal Culture and Nutrition
Language
eng
Abstract
A series of technical studies were performed to develop simpler methods of measuring the rate of ruminal volatile fatty acid (VFA) production and a practical but effective way of sampling ruminal fluid. In experiment 1, an in vitro technique (procedure and mathematical approach) were developed to estimate ruminal VFA production in vivo. This method provides a practical approach to measure the ruminal fermentation of different diets and their impact on the profile of nutrients available for production under non-steady state conditions. In experiment 2, a device was developed which allowed time-integrated samples of ruminal fluid to be collected without repeated entry into the rumen. This method simplified the collection of ruminal fluid and produced samples representative of overall ruminal fermentation, providing a promising alternative to conventional sampling techniques. This method may prove useful in investigating factors affecting the dynamics of ruminal fermentation and may also help in the identification of variables associated with various metabolic diseases. In experiment 3, a technique for measuring the rate of ruminal VFA production (under steady state conditions) in large ruminants using a stable isotope was developed. This allowed the rate of ruminal VFA production to be measured without the health and safety concerns associated with radioactive isotopic studies. This method provides a promising alternative to conventional radioactive isotope dilution techniques and may prove useful in studying the factors affecting ruminal fermentation.
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