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Home / 2016 / June / 28 / Wood mulch can help in climate change fight
Environment & Sustainability, Research

Wood mulch can help in climate change fight

June 28, 2016

In addition to looking nice, covering soil with wood mulch can actually help reduce greenhouse gas emissions, UBC research shows.

A recording chamber used by Nichol in his research was able to determine the level of nitrous oxide being emitted.

A recording chamber used by Nichol in his research was able to determine the level of nitrous oxide being emitted.

In a recent study undertaken in Kelowna-area vineyards, UBC Okanagan researchers discovered that using mulch in agriculture can cut nitrous oxide emissions up to 28 per cent.

“In addition to saving water, improving soil, combatting pests and stopping weeds, wood mulch actually reduces the release of a greenhouse gas 300 times more potent than carbon dioxide,” says Craig Nichol, senior instructor of Earth and Environmental Sciences. “Provided you are not driving great distances to obtain the mulch, it would appear that mulch could be a powerful tool in helping to reduce greenhouse gas emissions, particularly if used in these agricultural systems.”

Nichol’s research was part of a two-year study in which small emissions-recording chambers were placed on top of bare soil as well as soil covered by mulch.

In addition to reduced levels of nitrous oxide emissions, mulched areas also showed a 74 per cent reduction in soil nitrates. The nitrates are the source material for nitrous oxide emissions and can also leach into groundwater.

According to Agriculture and Agri-Food Canada, nitrous oxide emitted from soil accounts for one-half of agriculture emissions that contribute to global warming. Emission levels are often higher in agricultural soil due to the use fertilizers and manure.

Nichol’s research was part of a larger study with fellow UBC researchers Melanie Jones and Louise Nelson. The study was recently published in the journal Agricultural Water Management. To find out more, visit: sciencedirect.com/science/article/pii/S0378377416300592

Craig Nichol holds an unlikely tool in the battle against climate change, wood mulch.

Craig Nichol holds an unlikely tool in the battle against climate change, wood mulch.

—30—

Media Contact

Matthew Grant
Associate Director
Public Affairs

The University of British Columbia
Okanagan campus
Tel: 250-807-9926
E-mail: matthew.grant@ubc.ca

Content type: Media Release
More content from: Earth, Environmental and Geographic Sciences, Faculty of Management, Irving K Barber School of Arts and Sciences (prior July 2020)

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