- Oct 28, 2017
Cows love nibbling on this common pink seaweed growing off the coast of Australia—and it apparently reduces their gassy emissions by 99%.
A puffy pink seaweed that can stop cows from burping out methane is being primed for mass farming by Australian researchers.
The particular seaweed species, called Asparagopsis, grows prolifically off the Queensland Coast, and was the only seaweed found to have the effect in a study five years ago led by CSIRO. Even a small amount of the seaweed in a cow’s diet was shown to reduce the animal’s gases by 99%. Associate Professor Nick Paul, who is the leader of the Seaweed Research Group at the University of the Sunshine Coast (USC), said that if Australia could grow enough of the seaweed for every cow in the nation, the country could cut its greenhouse gas emissions by 10%.
“When added to cow feed at less than 2% of the dry matter, this particular seaweed completely knocks out methane production. It contains chemicals that reduce the microbes in the cows’ stomachs that cause them to burp when they eat grass.” The USC team is working at the Bribie Island Research Centre in Moreton Bay to learn more about how to grow the seaweed species, with the goal of informing a scale-up of production that could supplement cow feed on a national—and even global scale.
“This seaweed has caused a lot of global interest and people around the world are working to make sure the cows are healthy, the beef and the milk are good quality,” Dr. Paul said. “That’s all happening right now. But the one missing step, the big thing that is going to make sure this works at a global scale, is to make sure we can produce the seaweed sustainably.
Since there's no single solution to reducing global emissions, this is a good thing to add to the list of things to do. I think methane is also a more potent greenhouse gas than CO2 so reducing that is good.