Agritrop
Accueil

Simulating N2O fluxes from a Brazilian cropped soil with contrasted tillage practices

Metay Aurélie, Chapuis-Lardy Lydie, Findeling Antoine, Oliver Robert, Alves Moreira José Aloisio, Feller Christian. 2011. Simulating N2O fluxes from a Brazilian cropped soil with contrasted tillage practices. Agriculture, Ecosystems and Environment, 140 (1-2) : 255-263.

Article de revue ; Article de revue à facteur d'impact
[img] Version publiée - Anglais
Accès réservé aux personnels Cirad
Utilisation soumise à autorisation de l'auteur ou du Cirad.
document_558345.pdf

Télécharger (373kB)

Quartile : Outlier, Sujet : AGRICULTURE, MULTIDISCIPLINARY / Quartile : Q1, Sujet : ENVIRONMENTAL SCIENCES / Quartile : Q2, Sujet : ECOLOGY

Résumé : Assessing the N2O fluxes balance is a key challenge to estimate the effect of agriculture practices on greenhouse gas production. N2O fluxes remained difficult to measure on a field scale due to high spatial and temporal variability and usually low concentrations. Our work aimed at (i) characterizing by laboratory measurements soil potential N2O emissions from nitrification and denitrification and (ii) testing a modelling approach of N2O emissions that circumvents the problem of discrete measurements for two Brazilian rainfed rice cropping systems, no-tillage (NT) vs. disk tillage (DT). This latter approach consisted in the combination of 2 models: a mechanistic water transfer model and a N2O emission model, namely PASTIS and NOE. Simulations with the PASTIS +NOEapproach showed for bothNTandDTtreatments that: (i) the soil emitted low amounts of N2O, (ii) emissions by denitrification corresponded to short periods of high N2O emissions (15 times as high as emission by nitrification), (iii) nitrification contributed to ca 35% of the total N2O emissions at the crop cycle scale, (iv) field N2O emission measurements corresponded to the low bound of simulated emissions from nitrification.

Mots-clés Agrovoc : Oryza sativa, oxyde nitreux, gaz à effet de serre, modèle de simulation, système de culture, cycle de l'azote, sol tropical, modélisation environnementale, dénitrification, nitrification, non-travail du sol, travail du sol

Mots-clés géographiques Agrovoc : Goias

Classification Agris : F08 - Systèmes et modes de culture
P02 - Pollution
F07 - Façons culturales
P01 - Conservation de la nature et ressources foncières
P33 - Chimie et physique du sol

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

  • Metay Aurélie, Montpellier SupAgro (FRA)
  • Chapuis-Lardy Lydie, IRD (SEN)
  • Findeling Antoine, CIRAD-PERSYST-UPR Recyclage et risque (FRA)
  • Oliver Robert
  • Alves Moreira José Aloisio, EMBRAPA (BRA)
  • Feller Christian, IRD (MDG)

Autres liens de la publication

Source : Cirad - Agritrop (https://agritrop.cirad.fr/558345/)

Voir la notice (accès réservé à Agritrop) Voir la notice (accès réservé à Agritrop)

[ Page générée et mise en cache le 2024-01-28 ]