Morrisons begins trial to use British seaweed to feed cattle to reduce carbon emissions

Bradford-based Morrisons is working with Queen’s University Belfast on a three-year trial looking at the use of seaweed from the UK in helping to reduce methane production in cattle.

The research programme is being led by Professor Sharon Huws and Dr Katerina Theodoridou of the Institute for Global Food Security (IGFS) at the university.

It is testing indigenous seaweed from the Irish and UK coastlines with the aim to evaluate the nutritional value of seaweed and assess its potential to reduce methane emissions, improve animal health, and enhance meat and milk quality.

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Morrisons has begun a trial using seaweed.

Scientific research earlier this year found that cows belched out 82 per cent less methane after putting a small amount of red seaweed in their feed.

Indigenous UK sourced seaweed contains active compounds called phlorotannins which are safe and often found in red wine and red berries. Phlorotannins are also anti-bacterial and improve immunity and so have additional health benefits for cows.

Working with its beef farmers, Morrisons will take the learnings out of the lab and put them to practice in the fields. It plans to work with UK fishermen who already supply its stores, to source seaweed which would then be converted into a supplement.

Morrisons is funding and supporting the programme and a PhD research project at IGFS. A significant part of this is providing access for a PhD student to manage trials in methane reduction on commercial partner farms.

Morrisons has begun a trial using seaweed.

Cows produce methane via microbes in their stomachs as they digest fibrous food in a process similar to fermentation. Methane is a major greenhouse gas. It does not last as long as carbon dioxide in the atmosphere but is more than 30 times as effective in trapping heat. UK agriculture currently accounts for 10 per cent of all UK greenhouse gas emissions. Within this, beef farming is the most carbon intensive - generating 45 per cent of carbon emissions for only five per cent of products sold. Nearly half of this is down to methane produced by cattle.

Professor Sharon Huws, Professor of Animal Science and Microbiology of IGFS and who is leading the research programme at Queen’s University Belfast, said: “We are excited to publish our lab research in due course. This is showing that, of several UK seaweeds tested in the lab, at least one is indicating a reduction in methane production. The next step will be to trial the effective seaweeds as nutritional supplements for cows and this will be managed by a Morrisons-funded PhD student. This is a truly innovative partnership between a retailer and researchers. The involvement of Morrisons means that effective methane reduction can be rolled out to Morrisons farmers’ herds of beef cows, and the seaweed needed can be sourced through its relationships with fisheries.”

Sophie Throup, Head of Agriculture at Morrisons, said: “As British farming's biggest customer, we’re very mindful of our role in supporting and inspiring the farmers we work with to help them achieve goals in sustainable farming. With our own livestock experts and direct relationships with farmers we’re able to make changes quickly. By supporting this PhD studentship and wider research we are trialling this natural approach to reducing the environmental emissions caused by burps and flatulence from cows - as well as improving the quality of beef products.”

Morrisons has already embarked on a programme to be completely supplied by net zero carbon British farms by 2030, five years ahead of the market.