No-tillage lessens soil CO2 emissions the most under arid and sandy soil conditions: results from a meta-analysis

cg.contactVincent.chaplot@ird.fren_US
cg.contributor.centerUniversity of KwaZulu-Natal - UKZNen_US
cg.contributor.centerInternational Crops Research Institute for the Semi-Arid Tropics - ICRISATen_US
cg.contributor.centerInstitut Pierre Simon Laplace - IPSLen_US
cg.contributor.centerInstitut de Recherche pour le Developpement - IRDen_US
cg.contributor.crpCRP on Dryland Systems - DSen_US
cg.contributor.funderNot Applicableen_US
cg.coverage.regionGlobalen_US
cg.date.embargo-end-date2017-01-31en_US
cg.identifier.doihttps://dx.doi.org/10.5194/bg-13-3619-2016en_US
cg.isijournalISI Journalen_US
cg.issn1726-4170en_US
cg.issue12en_US
cg.journalBiogeosciencesen_US
cg.subject.agrovocno tillageen_US
cg.subject.agrovocsoilen_US
cg.subject.agrovocsoil propertiesen_US
cg.volume13en_US
dc.contributorChivenge, Paulineen_US
dc.contributorCiais, Philippeen_US
dc.contributorChaplot, Vincenten_US
dc.creatorAbdalla, Khataben_US
dc.date.accessioned2017-02-08T22:45:32Z
dc.date.available2017-02-08T22:45:32Z
dc.description.abstractThe management of agroecosystems plays a crucial role in the global carbon cycle with soil tillage leading to known organic carbon redistributions within soils and changes in soil CO2 emissions. Yet, discrepancies exist on the impact of tillage on soil CO2 emissions and on the main soil and environmental controls. A meta-analysis was conducted using 46 peer-reviewed publications totaling 174 paired observations comparing CO2 emissions over entire seasons or years from tilled and untilled soils across different climates, crop types and soil conditions with the objective of quantifying tillage impact on CO2 emissions and assessing the main controls. On average, tilled soils emitted 21% more CO2 than untilled soils, which corresponded to a significant difference at P<0:05. The difference increased to 29% in sandy soils from arid climates with low soil organic carbon content (SOCC < 1 %) and low soil moisture, but tillage had no impact on CO2 fluxes in clayey soils with high background SOCC (> 3 %). Finally, nitrogen fertilization and crop residue management had little effect on the CO2 responses of soils to no-tillage. These results suggest no-tillage is an effective mitigation measure of carbon dioxide losses from dry land soils. They emphasize the importance of including information on soil factors such as texture, aggregate stability and organic carbon content in global models of the carbon cycleen_US
dc.formatPDFen_US
dc.identifierhttp://oar.icrisat.org/id/eprint/9597en_US
dc.identifierhttps://mel.cgiar.org/reporting/downloadmelspace/hash/jCTe5qWo/v/10ffcf668670b1da7dedc471142caffden_US
dc.identifier.citationKhatab Abdalla, Pauline Chivenge, Philippe Ciais, Vincent Chaplot. (21/6/2016). No-tillage lessens soil CO2 emissions the most under arid and sandy soil conditions: results from a meta-analysis. Biogeosciences, 13(12), pp. 3619-3633.en_US
dc.identifier.statusLimited accessen_US
dc.identifier.urihttps://hdl.handle.net/20.500.11766/5580
dc.languageenen_US
dc.publisherEuropean Geosciences Union (EGU)en_US
dc.rightsCC-BY-NC-4.0en_US
dc.sourceBiogeosciences;13,(2016) Pagination 3619,3633en_US
dc.subjectco2 emissionsen_US
dc.subjectsoil conditionsen_US
dc.titleNo-tillage lessens soil CO2 emissions the most under arid and sandy soil conditions: results from a meta-analysisen_US
dc.typeJournal Articleen_US
dcterms.available2016-06-21en_US
dcterms.extent3619-3633en_US
mel.impact-factor3.70en_US

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