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dc.contributorChivenge, Paulineen_US
dc.contributorEverson, Colinen_US
dc.contributorMathieu, Olivieren_US
dc.contributorThevenot, Mathieuen_US
dc.contributorChaplot, Vincenten_US
dc.creatorAbdalla, Khataben_US
dc.identifier.citationKhatab Abdalla, Pauline Chivenge, Colin Everson, Olivier Mathieu, Mathieu Thevenot, Vincent Chaplot. (15/7/2016). Long-term annual burning of grassland increases CO2 emissions from soils. Geoderma, 282, pp. 80-86.en_US
dc.description.abstractGrasslands have potential to mitigate against climate change because of their large capacity to store soil organic carbon (SOC). However, the long-term impact of grassland management such as burning, which is still common in many areas of theworld, on SOC is still a matter of debate. The objective of this studywas to quantify the longterm effects of annual burning on CO2 output from soils and SOC stocks. The study was performed on a 62 years old field trial comparing annual burning (AB) to no burning associated with tree encroachment (NB), and to annual mowing (AM) with all treatments laid out in randomized block design with three replicates per treatment. CO2 emissions from soil were continuously measured over two years and were correlated to soil chemical and physical properties. AB and AM produced 30 and 34% greater CO2 emissions from soil than NB (1.80 ± 0.13 vs. 2.34±0.18 and 2.41±0.17 g C-CO2m−2 d−1 for NB, AB and AMrespectively). AB and AMalso produced greater CO2 emissions fromsoil and per gramof soil carbon (1.32±0.1 and 1.35±0.1 mgC-CO2 gC−1 d−1, respectively) than NB(1.05±0.07mgC-CO2gC−1 d−1),which corresponded to significant differences of respectively 26% and 29%. Overall, CO2 emissions fromsoil (perm2) significantly increased with soil water content (r=0.72) followed by SOC stocks (r= 0.59), SOC content (r =0.50), soil bulk density (r= 0.49), soil temperature (r=0.47), C:N ratio (r=0.46) and meanweight diameter (r=0.38). These findings suggest that long-termannual burning increases CO2 output from soils. Additional greenhouse gases emissions from burning itself and alternative grassland management techniques were finally discussed.en_US
dc.sourceGeoderma;282,(2016) Pagination 80,86en_US
dc.subjectgrassland managemenen_US
dc.subjectburning soilen_US
dc.subjectcarbon soilen_US
dc.titleLong-term annual burning of grassland increases CO2 emissions from soilsen_US
dc.typeJournal Articleen_US
cg.subject.agrovoccarbon cycleen_US
cg.contributor.centerUniversity of KwaZulu-Natal - UKZNen_US
cg.contributor.centerInternational Crops Research Institute for the Semi-Arid Tropics - ICRISATen_US
cg.contributor.centerUniversité de Bourgogneen_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.regionSouthern Africaen_US
dc.identifier.statusLimited accessen_US

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