A scientist studying livestock emissions says adding supplements to cattle feed will only have a short term effect.
Livestock sustainability consultant Dr Jude Capper, who did her greenhouse gas research at Cornell University in the United States, says a cow’s stomach will adjust to changes in diet, and soon return to producing the same amount of methane as before.
She delivered her findings to a national dairy conference at Camden west of Sydney.
Dr Capper says Australia’s tests on waste from wine grapes (grape marc) and oilseed in cattle feed showed they work only for a few weeks.
“Long term, the rumen has a tendency to return to normal no matter what you do to it,” she said.