Abalos, D; Recous, S.; Butterbach-Bahl, K.; Notaris, C.; Rittl, T. F.; Topp, C F E; Søren, P.O.; Hansen, S.; Bleken, M.A.; Rees, R M and Olesen, J.E. (2022) A review and meta-analysis ofmitigation measures for nitrous oxide emissions from crop residues. Science of the Total Environment journal, 828, p. 154388.
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Summary in the original language of the document
Crop residues are of crucial importance to maintain or even increase soil carbon stocks and fertility, and thereby to ad- dress the global challenge of climate change mitigation. However, crop residues can also potentially stimulate emis- sions of the greenhouse gas nitrous oxide (N2O) from soils. A better understanding of how to mitigate N2O emissions due to crop residue management while promoting positive effects on soil carbon is needed to reconcile the opposing effects of crop residues on the greenhouse gas balance of agroecosystems. Here, we combine a literature review and a meta-analysis to identify and assess measures for mitigating N2O emissions due to crop residue applica- tion to agricultural fields. Our study shows that crop residue removal, shallow incorporation, incorporation ofresidues with C:N ratio > 30 and avoiding incorporation of residues from crops terminated at an immature physiological stage, are measures leading to significantly lower N2O emissions. Other practices such as incorporation timing and interac- tions with fertilisers are less conclusive. Several of the evaluated N2O mitigation measures implied negative side- effects on yield, soil organic carbon storage, nitrate leaching and/or ammonia volatilization. We identified additional strategies with potential to reduce crop residue N2O emissions without strong negative side-effects, which require fur- ther research. These are: a) treatment ofcrop residues before field application, e.g., conversion ofresidues into biochar or anaerobic digestate, b) co-application with nitrification inhibitors or N-immobilizing materials such as compost with a high C:N ratio, paper waste or sawdust, and c) use ofresidues obtained from crop mixtures. Our study provides a scientific basis to be developed over the coming years on how to increase the sustainability of agroecosystems though adequate crop residue management.
EPrint Type: | Journal paper |
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Keywords: | Agricultural management, Tillage, Plant litter, Trade-offs, nitrogen |
Agrovoc keywords: | Language Value URI English nitrous oxide http://aims.fao.org/aos/agrovoc/c_12838 English mitigation http://aims.fao.org/aos/agrovoc/c_10a6fbd8 English residues http://aims.fao.org/aos/agrovoc/c_6518 English agricultural soils http://aims.fao.org/aos/agrovoc/c_33934 |
Subjects: | Environmental aspects > Air and water emissions |
Research affiliation: | Denmark > AU - Aarhus University France > INRAe - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Norway > NMBU - Norwegian University of Life Sciences Norway > NORSØK - Norwegian Centre for Organic Agriculture UK > Scottish Rural Colleges (SRUC - previously SAC) Germany > Other organizations Germany |
Horizon Europe or H2020 Grant Agreement Number: | 696356 |
Related Links: | https://orgprints.org/id/eprint/43610/ |
Deposited By: | F Rittl, Tatiana |
ID Code: | 43892 |
Deposited On: | 28 Mar 2022 06:14 |
Last Modified: | 26 Feb 2023 13:27 |
Document Language: | English |
Status: | Published |
Refereed: | Peer-reviewed and accepted |
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