Abstract:
:While concerns about human-induced effects on the Earth's climate have mainly concentrated on carbon dioxide (CO2) and methane (CH4), reducing anthropogenic nitrous oxide (N2O) flux, mainly of agricultural origin, also represents an opportunity for substantial mitigation. To develop a solution that induces neither the transfer of nitrogen pollution nor decreases agricultural production, we specifically investigated the last step of the denitrification pathway, the N2O reduction path, in soils. We first observed that this path is mainly driven by soil pH and is progressively inhibited when pH is lower than 6.8. During field experiments, we observed that liming acidic soils to neutrality made N2O reduction more efficient and decreased soil N2O emissions. As we estimated acidic fertilized soils to represent 37% [27-50%] of French soils, we calculated that liming could potentially decrease France's total N2O emissions by 15.7% [8.3-21.2%]. Nevertheless, due to the different possible other impacts of liming, we currently recommend that the deployment of this solution to mitigate N2O emission should be based on local studies that take into account agronomic, environmental and economic aspects.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Hénault C,Bourennane H,Ayzac A,Ratié C,Saby NPA,Cohan JP,Eglin T,Gall CLdoi
10.1038/s41598-019-56694-3subject
Has Abstractpub_date
2019-12-27 00:00:00pages
20182issue
1issn
2045-2322pii
10.1038/s41598-019-56694-3journal_volume
9pub_type
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