Abstract

Volatile fatty acids are the main energy product from rumen fermentation. This study investigated the individuality of VFA concentrations in samples of rumen fluid obtained from 10 Holstein cows using a esophageal probe to take samples repeatedly over a 7 week period. Systematic changes were seen for propionic acid after onset of lactation, but acetic and butyric acid was not affect. Repeatability was generally low, but highest for propionic acid. VFA traits should be used as supplementary information in metagenomic studies.

Jan Lassen, Peter Lovendahl, Lise Kristensen, Zhigang Zhu, Ole Højberg, Morten Poulsen, Samantha J Noel

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume Genetics of Trait Complexes: Feed intake and efficiency (Posters), , 573, 2014
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