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Challenges of accounting nitrous oxide emissions from agricultural crop residues

Olesen, Jørgen E.; Ress, Robert; Recous, Sylvie; Bleken, Marina Azzaroli; Abalos, D; Ahuja, Ishita; Butterbach-Bahl, K.; Carozzi, M.; Notaris, C.; Ernfors, Maria; Haas, E. De; Hansen, Sissel; Janz, Baldur; Lashermes, G; Massad, R; Petersen, Søren O.; Rittl, Tatiana; Scheer, C.; Smith, K. E.; Thiébeau, P; Taghizadeh-Toosi, Arezoo; Thorman, R. E. and Topp, Cairistiona F E (2023) Challenges of accounting nitrous oxide emissions from agricultural crop residues. Global change biology, 29, pp. 6846-6855.

[thumbnail of Global Change Biology - 2023 - Olesen - Challenges of accounting nitrous oxide emissions from agricultural crop residues.pdf] PDF - Published Version - English

Summary in the original language of the document

Crop residues are important inputs of carbon (C) and nitrogen (N) to soils and thus directly and indirectly affect nitrous oxide (N2O) emissions. As the current inventory methodology considers N inputs by crop residues as the sole determining factor for N2O emissions, it fails to consider other underlying factors and processes. There is compelling evidence that emissions vary greatly between residues with different bio-chemical and physical characteristics, with the concentrations of mineralizable N and decomposable C in the residue biomass both enhancing the soil N2O production po-tential. High concentrations of these components are associated with immature resi-dues (e.g., cover crops, grass, legumes, and vegetables) as opposed to mature residues (e.g., straw). A more accurate estimation of the short-term (months) effects of the crop residues on N2O could involve distinguishing mature and immature crop residues with distinctly different emission factors. The medium-term (years) and long-term (decades) effects relate to the effects of residue management on soil N fertility and soil physical and chemical properties, considering that these are affected by local cli-matic and soil conditions as well as land use and management. More targeted mitiga-tion efforts for N2O emissions, after addition of crop residues to the soil, are urgently needed and require an improved methodology for emission accounting. This work needs to be underpinned by research to (1) develop and validate N2O emission fac-tors for mature and immature crop residues, (2) assess emissions from belowground residues of terminated crops, (3) improve activity data on management of different residue types, in particular immature residues, and (4) evaluate long-term effects of residue addition on N2O emissions.

EPrint Type:Journal paper
Keywords:ResidueGas, accounting, soil
Agrovoc keywords:
crop residues
nitrous oxide
Subjects: Soil
Environmental aspects
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 > NIBIO – Norwegian Institute of Bioeconomy Research
Norway > NORSØK - Norwegian Centre for Organic Agriculture
Sweden > Swedish University of Agricultural Sciences (SLU)
UK > Scottish Rural Colleges (SRUC - previously SAC)
Deposited By: F Rittl, Tatiana
ID Code:52793
Deposited On:14 Mar 2024 07:58
Last Modified:14 Mar 2024 07:58
Document Language:English
Refereed:Peer-reviewed and accepted

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