Thursday 5 December 2019

Start Date

5-12-2019 11:30 AM

End Date

5-12-2019 11:45 AM

Session

Soil R&D Outcomes WA & Beyond

Session Chair

Assoc Prof. Louise Barton

Description

National initiatives to mitigate and adopt to climate change imply the need for enhancing carbon (C) sequestration in soils. Soil process models often render a C baseline hardly representative and its C sequestration potential questionable when initial soil C pools are not accounted. Here we use the soil process model Roth C to simulate site-specific soil C across 4431 sites in Australia. After matching the modelled and measured C pools at initial equilibrium, the model predicted C sequestration potentials in soils, coherent to changes among the pools, in response to soil inputs that represent soil and residue management. We show that the extent of C sequestration is constrained by C composition that is further influenced by climate and land use. Our results highlight the importance of improving and optimising climate change mitigation and adaptation based on soil C composition.

Included in

Soil Science Commons

COinS
 
Dec 5th, 11:30 AM Dec 5th, 11:45 AM

Simulating Australian soil organic carbon sequestration

National initiatives to mitigate and adopt to climate change imply the need for enhancing carbon (C) sequestration in soils. Soil process models often render a C baseline hardly representative and its C sequestration potential questionable when initial soil C pools are not accounted. Here we use the soil process model Roth C to simulate site-specific soil C across 4431 sites in Australia. After matching the modelled and measured C pools at initial equilibrium, the model predicted C sequestration potentials in soils, coherent to changes among the pools, in response to soil inputs that represent soil and residue management. We show that the extent of C sequestration is constrained by C composition that is further influenced by climate and land use. Our results highlight the importance of improving and optimising climate change mitigation and adaptation based on soil C composition.