Ruminal Methane Production on Simple Phenolic Acids Addition in in Vitro Gas Production Method
ABSTRACT: Methane production
from ruminants contributes to total global methane production, which is an
important contributor to global warming. In this experiment, six sources of
simple phenolic acids (benzoic, cinnamic, phenylacetic, caffeic, p-coumaric and
ferulic acids) at two different levels (2 and 5 mM) added to hay diet were
evaluated for their potential to reduce enteric methane production using in
vitro Hohenheim gas production method. The measured variables were gas
production, methane, organic matter digestibility (OMD), and short chain fatty
acids (SCFA). The results showed that addition of cinnamic, caffeic, p-coumaric
and ferulic acids at 5 mM signifi cantly (P<0.05) decreased methane
production. Caffeic acid at 5 mM was the most effective out of the simple
phenols tested and it decreased methane by 6.3% from the control. The order of
simple phenols to decrease methane was: caffeic acid > p-coumaric >
ferulic > cinnamic. The addition of simple phenols did not signifi cantly
decrease OMD. Addition of simple phenols tends to decrease total SCFA
production. It was concluded that methane decrease by addition of phenolic
acids was relatively small, and the effect of phenolic acids on methane
decrease depended on the source and concentration applied.
Author: A. Jayanegara
Journal Code: jppeternakangg090008
