Challenges of accounting nitrous oxide emissions from agricultural crop residues
2023
Olesen, Jørgen, E | Rees, Robert, M | Recous, Sylvie | Bleken, Marina, A | Abalos, Diego | Ahuja, Ishita | Butterbach-Bahl, Klaus | Carozzi, Marco | de Notaris, Chiara | Ernfors, Maria | Haas, Edwin | Janz, Baldur | Hansen, Sissel | Lashermes, Gwenaëlle | Massad, Raia, S | Petersen, Søren | Rittl, Tatiana, F | Scheer, Clemens | Thiébeau, P. | Smith, Kate, E | Thorman, Rachel, E | Taghizadeh-Toosi, Arezoo | Topp, Cairistiona | Department of Agroecology, ; Aarhus University [Aarhus] | Scotland's Rural College (SRUC) | Fractionnement des AgroRessources et Environnement (FARE) ; Université de Reims Champagne-Ardenne (URCA)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | Norwegian University of Life Sciences, As, Norway | Department of Agroecology, Aarhus University, Tjele, Denmark | Norwegian Centre for Organic Agriculture (NORSOK) | Norsk institutt for bioøkonomi=Norwegian Institute of Bioeconomy Research (NIBIO) | Karlsruhe Institute of Technology (KIT) | Sciences pour l'Action et le Développement : Activités, Produits, Territoires (SADAPT) ; AgroParisTech-Université Paris-Saclay-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | Ecologie fonctionnelle et écotoxicologie des agroécosystèmes (ECOSYS) ; AgroParisTech-Université Paris-Saclay-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | Euro-Mediterranean Center on Climate Change (CMCC) | Department of Biosystems and Technology ; Swedish University of Agricultural Sciences (SLU) | Swedish University of Agricultural Sciences (SLU) | NORWEGIAN UNIVERSITY OF LIFE SCIENCES AS NOR ; Partenaires IRSTEA ; Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) | ADAS, ADAS Boxworth, Cambridge UK | Department of Agroecology ; Aarhus University [Aarhus] | Danish Technological Institute (DTI) | ANR | ANR-17-EGAS-0003,ResidueGas,Improved estimation and mitigation of nitrous oxide emissions and soil carbon storage from crop residues(2017)
International audience
显示更多 [+] 显示较少 [-]英语. Abstract 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 biochemical and physical characteristics, with the concentrations of mineralizable N and decomposable C in the residue biomass both enhancing the soil N2O production potential. High concentrations of these components are associated with immature residues (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 climatic and soil conditions as well as land use and management. More targeted mitigation efforts for N 2 O 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 N 2 O emission factors 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.
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