By Jamie Martin
According to the research conducted by Adelaide University, researchers have identified a natural way to cut methane emissions from beef cattle raised in grazing systems. Their work highlights a seaweed extract as a promising tool for climate smart agriculture.
Livestock's methane is a major contributor to climate change, and pasture-based systems present special challenges for emission control. Grazing cattle eats variable amounts of feed, making consistent supplementation difficult.
The study tested a bromoform extract oil made from red seaweed called Asparagopsis. The supplement was given to pregnant and lactating Angus cows over eight weeks under normal grazing conditions.
Methane emissions fell sharply, with reductions ranging from 49% to 77%. These results show strong potential for methane control outside feedlots.
"This is critical," said Lead researcher Dr. Mariana Caetano, from the School of Animal and Veterinary Sciences. "In breeding systems, it's not just about the cow—you need to be confident there are no unintended consequences for their offspring."
Animal health and productivity remained stable. The cows kept healthy body weight, even though they consumed slightly less feed. This could help farms lower input costs while maintaining output.
Calf health was a major focus of the study. Researchers monitored calves from birth to 150 days of age and found normal growth and development. This confirmed the supplement caused no harm to young animals.
Some changes occurred in blood chemistry, including slightly higher pH levels in a few cows and calves. However, all readings stayed within normal health limits. Researchers emphasized the importance of further long-term analysis.
This study is one of the first to prove that methane reducing supplements can work effectively in pasture-based beef systems. Such systems dominate beef production in many regions.
Scientists conclude that with improved delivery methods and proper dosing, seaweed supplements could become a practical solution for reducing livestock emissions while supporting farm sustainability.
Photo Credit: gettyimages-imaginegolf
Categories: National