Agritrop
Accueil

Soil nitrogen balance resulting from N fixation and rhizodeposition by the symbiotic association Anthyllis vulneraria/Mesorhizobium metallidurans grown in highly polluted Zn, Pb and Cd mine tailings

Mathieu Stéphanie, Escarré José, Brunel Brigitte, Méjamolle Angélique, Soussou Souhir, Galiana Antoine, Cleyet-Marel Jean-Claude. 2014. Soil nitrogen balance resulting from N fixation and rhizodeposition by the symbiotic association Anthyllis vulneraria/Mesorhizobium metallidurans grown in highly polluted Zn, Pb and Cd mine tailings. Plant and Soil, 375 (1-2) : 175-188.

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_573093.pdf

Télécharger (397kB)

Quartile : Q1, Sujet : AGRONOMY / Quartile : Q1, Sujet : SOIL SCIENCE / Quartile : Q1, Sujet : PLANT SCIENCES

Résumé : The association of the legume Anthyllis vulneraria and the grass Festuca arvernensis, was found to be very efficient for the phytostabilisation of highly multi-metal contaminated mine tailings. Our objective was to quantify the contribution of Anthyllis inoculated with its symbiotic bacteria Mesorhizobium metallidurans to the soil N pool and to test whether a starter nitrogen fertilization may improve symbiotic nitrogen fixation and the growth of Festuca. Methods Plants of Festuca and of Anthyllis inoculated with M. metallidurans were grown separately during eight months in pots filled with mine contaminated soil. Estimation of the N fluxes was realized using 15?N isotopic methods. Results Starter N fertilization (28 kg N ha?1) improved symbiotic N2 fixation and the growth of both species. Belowground N balance (N rhizodeposition - soil N uptake) of the non-fertilized Anthyllis at maturity was negative (?30.6 kg N ha?1). However, the amount of N derived from fixation, including above- and belowground parts, was 78.6 kg N ha?1, demonstrating the ability of this symbiotic association to improve soil N content after senescence. Conclusions i) soil N enrichment by the N2-fixing symbiotic association occurs after plant senescence, when decaying leaves and shoots are incorporated into the soil; ii) application of a starter fertilization is an efficient solution to improve phytostabilisation of highly contaminated sites.

Mots-clés Agrovoc : Anthyllis vulneraria, Festuca, Rhizobium, bioremédiation, récupération des sols, azote, sol pollué, plante antiérosive, Fixation de l'azote, métal lourd, fertilisation, teneur en azote, industrie minière

Mots-clés géographiques Agrovoc : Languedoc-Roussillon, France

Mots-clés complémentaires : Mesorhizobium

Classification Agris : P34 - Biologie du sol
P36 - Érosion, conservation et récupération des sols
P35 - Fertilité du sol

Champ stratégique Cirad : Axe 1 (2014-2018) - Agriculture écologiquement intensive

Auteurs et affiliations

  • Mathieu Stéphanie, CEFE (FRA)
  • Escarré José, CEFE (FRA)
  • Brunel Brigitte, LSTM (FRA)
  • Méjamolle Angélique, INRA (FRA)
  • Soussou Souhir, LSTM (FRA)
  • Galiana Antoine, CIRAD-BIOS-UMR LSTM (FRA) ORCID: 0000-0002-5293-5049
  • Cleyet-Marel Jean-Claude, INRA (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/573093/)

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

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