Hysteretic response of N2O reductase activity to soil pH variations after application of lime to an acidic agricultural soil

Autor: Iheb Ouerghi, Camille Rousset, Florian Bizouard, Henri Brefort, Marjorie Ubertosi, Mustapha Arkoun, Catherine Hénault
Přispěvatelé: Agroécologie [Dijon], Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro Dijon, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Timac - Agro International, The authors gratefully acknowledge funding for the NatAdGES project from the 'Investissement d’Avenir' program, ISITE-BFC project (contract ANR-15-IDEX-0003), the European Regional Development Fund (FEDER), the public investment bank (BPI France) and the CMI-Roullier., ANR-15-IDEX-0003,BFC,ISITE ' BFC(2015), European Project: FEDER
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Biology and Fertility of Soils
Biology and Fertility of Soils, 2023, 59 (4), pp.473-479. ⟨10.1007/s00374-023-01717-5⟩
ISSN: 0178-2762
1432-0789
DOI: 10.1007/s00374-023-01717-5⟩
Popis: International audience; N2O contributes to increasing the greenhouse effect and is also involved in stratospheric ozone depletion. In soil and water, N2O reductase catalyses the reduction of N2O into the inert form N2. N2O reductase activity is known to be affected by acidic conditions and the application of liming materials to acidic soils is now proposed as a solution for mitigating soil N2O emissions. During a one-year laboratory experiment, we studied the functioning of N2O reductase after the application of calcium carbonates to an acidic soil with a very low capacity to reduce N2O. The functioning of N2O reductase was characterised through anaerobic incubations using the acetylene inhibition technique combined with a logistic model to determine the main enzyme functioning characteristics (latency, maximal rate). Both changes in soil pH and soil capacity to reduce N2O were rapidly observed after the application of lime materials. The activity of N2O reductase was observed to be efficient throughout the experiment even when the soil had returned to initial acidic conditions, revealing a hysteretic response of N2O reductase to pH variations. Nevertheless, some signs of lower N2O reductase activity over time were observed mainly after 200 days of applying lime materials. Altogether, these results suggest that, in this soil condition, the beneficial impact of the application of liming materials on N2O emissions could last longer than this on soil pH.
Databáze: OpenAIRE
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