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

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Relation http://oar.icrisat.org/9597/
http://dx.doi.org/10.5194/bg-13-3619-2016
10.5194/bg-13-3619-2016
 
Title No-tillage lessens soil CO2 emissions the most under arid and sandy soil conditions: results from a meta-analysis
 
Creator Abdalla, K
Chivenge, P
Ciais, P
Chaplot, V
 
Subject Soil
CO2 emissions
Soil Science
 
Description The 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 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
cycle.
 
Publisher European Geosciences Union
 
Date 2016-06-21
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://oar.icrisat.org/9597/1/bg-13-3619-2016.pdf
Abdalla, K and Chivenge, P and Ciais, P and Chaplot, V (2016) No-tillage lessens soil CO2 emissions the most under arid and sandy soil conditions: results from a meta-analysis. Biogeosciences, 13. pp. 3619-3633. ISSN 1726-4170