Testing Carbon Farming Opportunities for Salinity Management

Callum LoveAgriculture, Climate Change

People cutting up trees and mulching to assess carbon storage

NACC in partnership with DAFWA has released a report detailing the carbon sequestration opportunities on saline land. The pilot project on six farms, assessed the potential for trees and shrubs established on and around salt-affected lands to remove carbon dioxide from the atmosphere and store the carbon in new growth.

Findings from the study indicate that the amount of stored carbon decreases with increasing salinity beyond an apparent soil electrical conductivity (ECa) of 200 ms/m.

The average Tree Carbon stocks at 15 years (TC15) was found to be 42 tonnes of carbon dioxide equivalent (CO2-e) when grown in soil with an ECa of less than 200 ms/m. This decreased to 29 tonnes of CO2-e when the ECa increased to 200-299 ms/m and reduced to just 12 tonnes for soil where the ECa was greater than 300 ms/m.

Substantial difference in carbon storage was also found to occur between species, with Eucalyptus sargentii and Eucalyptus spathulata storing at least double the carbon of mallee or shrub species in all salinity categories.

To find out more about this project, read the full report.

Find out more about carbon farming and the CFI.

 

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