Synthesizing the evidence of nitrous oxide mitigation practices in agroecosystems

Diego Grados; Klaus Butterbach-Bahl; Ji Chen; Kees Jan van Groenigen; Jørgen Eivind Olesen; Jan Willem van Groenigen; Diego Abalos

doi:10.1088/1748-9326/ac9b50

Synthesizing the evidence of nitrous oxide mitigation practices in agroecosystems

Diego Grados^*, Klaus Butterbach-Bahl, Ji Chen, Kees Jan van Groenigen, Jørgen Eivind Olesen, Jan Willem van Groenigen, Diego Abalos

^*Corresponding author af dette arbejde

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Letter › peer review

29 Citationer (Scopus)

Abstract

Nitrous oxide (N₂O) emissions from agricultural soils are the main source of atmospheric N₂O, a potent greenhouse gas and key ozone-depleting substance. Several agricultural practices with potential to mitigate N₂O emissions have been tested worldwide. However, to guide policymaking for reducing N₂O emissions from agricultural soils, it is necessary to better understand the overall performance and variability of mitigation practices and identify those requiring further investigation. We performed a systematic review and a second-order meta-analysis to assess the abatement efficiency of N₂O mitigation practices from agricultural soils. We used 27 meta-analyses including 41 effect sizes based on 1119 primary studies. Technology-driven solutions (e.g. enhanced-efficiency fertilizers, drip irrigation, and biochar) and optimization of fertilizer rate have considerable mitigation potential. Agroecological mitigation practices (e.g. organic fertilizer and reduced tillage), while potentially contributing to soil quality and carbon storage, may enhance N₂O emissions and only lead to reductions under certain pedoclimatic and farming conditions. Other mitigation practices (e.g. lime amendment or crop residue removal) led to marginal N₂O decreases. Despite the variable mitigation potential, evidencing the context-dependency of N₂O reductions and tradeoffs, several mitigation practices may maintain or increase crop production, representing relevant alternatives for policymaking to reduce greenhouse gas emissions and safeguard food security.

Originalsprog	Engelsk
Artikelnummer	114024
Tidsskrift	Environmental Research Letters
Vol/bind	17
Nummer	11
ISSN	1748-9318
DOI	https://doi.org/10.1088/1748-9326/ac9b50
Status	Udgivet - nov. 2022

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@article{cf005631a6bf442a96e1925085037e50,

title = "Synthesizing the evidence of nitrous oxide mitigation practices in agroecosystems",

abstract = "Nitrous oxide (N2O) emissions from agricultural soils are the main source of atmospheric N2O, a potent greenhouse gas and key ozone-depleting substance. Several agricultural practices with potential to mitigate N2O emissions have been tested worldwide. However, to guide policymaking for reducing N2O emissions from agricultural soils, it is necessary to better understand the overall performance and variability of mitigation practices and identify those requiring further investigation. We performed a systematic review and a second-order meta-analysis to assess the abatement efficiency of N2O mitigation practices from agricultural soils. We used 27 meta-analyses including 41 effect sizes based on 1119 primary studies. Technology-driven solutions (e.g. enhanced-efficiency fertilizers, drip irrigation, and biochar) and optimization of fertilizer rate have considerable mitigation potential. Agroecological mitigation practices (e.g. organic fertilizer and reduced tillage), while potentially contributing to soil quality and carbon storage, may enhance N2O emissions and only lead to reductions under certain pedoclimatic and farming conditions. Other mitigation practices (e.g. lime amendment or crop residue removal) led to marginal N2O decreases. Despite the variable mitigation potential, evidencing the context-dependency of N2O reductions and tradeoffs, several mitigation practices may maintain or increase crop production, representing relevant alternatives for policymaking to reduce greenhouse gas emissions and safeguard food security.",

keywords = "agricultural soils, evidence synthesis, greenhouse gas, meta-analysis, mitigation, nitrous oxide",

author = "Diego Grados and Klaus Butterbach-Bahl and Ji Chen and \{Jan van Groenigen\}, Kees and Olesen, \{J{\o}rgen Eivind\} and \{Willem van Groenigen\}, Jan and Diego Abalos",

note = "Funding Information: This work was carried out within the framework of Aarhus University Interdisciplinary Centre for Climate Change (iClimate, Aarhus University). Financial support was provided by the Danish Council for Independent Research via the projects No. 9041-00324B and No. 1051-00060B to Diego Abalos. Ji Chen was supported by EU H2020 Marie Sk{\l}odowska-Curie Actions via project No. 839806. The authors are grateful to the researchers that kindly provided extra information on their articles and the authors of the studies included in the meta-analysis. Funding Information: This work was carried out within the framework of Aarhus University Interdisciplinary Centre for Climate Change (iClimate, Aarhus University). Financial support was provided by the Danish Council for Independent Research via the projects No. 9041-00324B and No. 1051-00060B to Diego Abalos. Ji Chen was supported by EU H2020 Marie Sk{\l}odowska-Curie Actions via project No. 839806. The authors are grateful to the researchers that kindly provided extra information on their articles and the authors of the studies included in the meta-analysis. Publisher Copyright: {\textcopyright} 2022 The Author(s). Published by IOP Publishing Ltd.",

year = "2022",

month = nov,

doi = "10.1088/1748-9326/ac9b50",

language = "English",

volume = "17",

journal = "Environmental Research Letters",

issn = "1748-9318",

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AU - Grados, Diego

AU - Butterbach-Bahl, Klaus

AU - Chen, Ji

AU - Jan van Groenigen, Kees

AU - Olesen, Jørgen Eivind

AU - Willem van Groenigen, Jan

AU - Abalos, Diego

N1 - Funding Information: This work was carried out within the framework of Aarhus University Interdisciplinary Centre for Climate Change (iClimate, Aarhus University). Financial support was provided by the Danish Council for Independent Research via the projects No. 9041-00324B and No. 1051-00060B to Diego Abalos. Ji Chen was supported by EU H2020 Marie Skłodowska-Curie Actions via project No. 839806. The authors are grateful to the researchers that kindly provided extra information on their articles and the authors of the studies included in the meta-analysis. Funding Information: This work was carried out within the framework of Aarhus University Interdisciplinary Centre for Climate Change (iClimate, Aarhus University). Financial support was provided by the Danish Council for Independent Research via the projects No. 9041-00324B and No. 1051-00060B to Diego Abalos. Ji Chen was supported by EU H2020 Marie Skłodowska-Curie Actions via project No. 839806. The authors are grateful to the researchers that kindly provided extra information on their articles and the authors of the studies included in the meta-analysis. Publisher Copyright: © 2022 The Author(s). Published by IOP Publishing Ltd.

PY - 2022/11

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N2 - Nitrous oxide (N2O) emissions from agricultural soils are the main source of atmospheric N2O, a potent greenhouse gas and key ozone-depleting substance. Several agricultural practices with potential to mitigate N2O emissions have been tested worldwide. However, to guide policymaking for reducing N2O emissions from agricultural soils, it is necessary to better understand the overall performance and variability of mitigation practices and identify those requiring further investigation. We performed a systematic review and a second-order meta-analysis to assess the abatement efficiency of N2O mitigation practices from agricultural soils. We used 27 meta-analyses including 41 effect sizes based on 1119 primary studies. Technology-driven solutions (e.g. enhanced-efficiency fertilizers, drip irrigation, and biochar) and optimization of fertilizer rate have considerable mitigation potential. Agroecological mitigation practices (e.g. organic fertilizer and reduced tillage), while potentially contributing to soil quality and carbon storage, may enhance N2O emissions and only lead to reductions under certain pedoclimatic and farming conditions. Other mitigation practices (e.g. lime amendment or crop residue removal) led to marginal N2O decreases. Despite the variable mitigation potential, evidencing the context-dependency of N2O reductions and tradeoffs, several mitigation practices may maintain or increase crop production, representing relevant alternatives for policymaking to reduce greenhouse gas emissions and safeguard food security.

AB - Nitrous oxide (N2O) emissions from agricultural soils are the main source of atmospheric N2O, a potent greenhouse gas and key ozone-depleting substance. Several agricultural practices with potential to mitigate N2O emissions have been tested worldwide. However, to guide policymaking for reducing N2O emissions from agricultural soils, it is necessary to better understand the overall performance and variability of mitigation practices and identify those requiring further investigation. We performed a systematic review and a second-order meta-analysis to assess the abatement efficiency of N2O mitigation practices from agricultural soils. We used 27 meta-analyses including 41 effect sizes based on 1119 primary studies. Technology-driven solutions (e.g. enhanced-efficiency fertilizers, drip irrigation, and biochar) and optimization of fertilizer rate have considerable mitigation potential. Agroecological mitigation practices (e.g. organic fertilizer and reduced tillage), while potentially contributing to soil quality and carbon storage, may enhance N2O emissions and only lead to reductions under certain pedoclimatic and farming conditions. Other mitigation practices (e.g. lime amendment or crop residue removal) led to marginal N2O decreases. Despite the variable mitigation potential, evidencing the context-dependency of N2O reductions and tradeoffs, several mitigation practices may maintain or increase crop production, representing relevant alternatives for policymaking to reduce greenhouse gas emissions and safeguard food security.

KW - agricultural soils

KW - evidence synthesis

KW - greenhouse gas

KW - meta-analysis

KW - mitigation

KW - nitrous oxide

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U2 - 10.1088/1748-9326/ac9b50

DO - 10.1088/1748-9326/ac9b50

M3 - Letter

AN - SCOPUS:85141749986

SN - 1748-9318

VL - 17

JO - Environmental Research Letters

JF - Environmental Research Letters

IS - 11

M1 - 114024

ER -

Synthesizing the evidence of nitrous oxide mitigation practices in agroecosystems

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