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Title of article :
The knowns, known unknowns and unknowns of sequestration of soil organic carbon
Author/Authors :
Uta Stockmann، نويسنده , , Mark A. Adams، نويسنده , , John W. Crawford، نويسنده , , Damien J. Field، نويسنده , , Nilusha Henakaarchchi، نويسنده , , Meaghan Jenkins، نويسنده , , Budiman Minasny، نويسنده , , Alex B. McBratney، نويسنده , , Vivien de Remy de Courcelles، نويسنده , , Kanika Singh، نويسنده , , Ichsani Wheeler، نويسنده , , Lynette Abbott، نويسنده , , Denis A. Angers، نويسنده , , Jeffrey Baldock، نويسنده , , Michael Bird، نويسنده , , Paolo Nannipieri and Philip C. Brookes ، نويسنده , , Claire Chenu، نويسنده , , Julie D. Jastrow، نويسنده , , Rattan Lal، نويسنده , , Johannes Lehmann، نويسنده , , David W. Hopkins and Anthony G. O’Donnell ، نويسنده , , et al.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2013
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Abstract :
Soil contains approximately 2344 Gt (1 gigaton = 1 billion tonnes) of organic carbon globally and is the largest terrestrial pool of organic carbon. Small changes in the soil organic carbon stock could result in significant impacts on the atmospheric carbon concentration. The fluxes of soil organic carbon vary in response to a host of potential environmental and anthropogenic driving factors. Scientists worldwide are contemplating questions such as: ‘What is the average net change in soil organic carbon due to environmental conditions or management practices?’, ‘How can soil organic carbon sequestration be enhanced to achieve some mitigation of atmospheric carbon dioxide?’ and ‘Will this secure soil quality?’. These questions are far reaching, because maintaining and improving the worldʹs soil resource is imperative to providing sufficient food and fibre to a growing population. Additional challenges are expected through climate change and its potential to increase food shortages. This review highlights knowledge of the amount of carbon stored in soils globally, and the potential for carbon sequestration in soil. It also discusses successful methods and models used to determine and estimate carbon pools and fluxes. This knowledge and technology underpins decisions to protect the soil resource.
Keywords :
Soil carbon sequestration , Soil carbon modelling , Soil carbon pools
Journal title :
Agriculture Ecosystems and Environment
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