Accéder directement au contenu Accéder directement à la navigation
Communication dans un congrès

Quantification of nitrogen fluxes and explanatory plant traits during a two year legume-cereal rotation

Abstract : A better understanding of how plant growth, N nutrition and symbiotic nitrogen fixation (SNF) are influenced by soil inorganic N availability, for a wide range of legume species, is crucial to optimise legume productivity, N2 fixation, while limiting environmental risks such as N leaching. A comparative analysis was performed for ten legume crops, grown in a field experiment and supplied with four levels of N fertiliser. Dry matter, N concentration and SNF were measured. Parallely, root traits were studied in a greenhouse experiment. For most species, inorganic N inputs had little effect on plant growth and N nutrition. SNF was negatively affected by soil inorganic N available at sowing but with large differences among species. The response varied according to plant N requirements for growth and plant inorganic N uptake ability. Legumes root systems differed according to root exploration of the soil, root branching and their response to inorganic N inputs; these observations were in great accordance with observations of plant ability to uptake inorganic N measured in the field experiment. Combining SNF response to soil inorganic N, shoot N and plant ability to uptake inorganic N, allowed a robust evaluation of species differential response to soil inorganic N.
Type de document :
Communication dans un congrès
Liste complète des métadonnées

https://hal.inrae.fr/hal-02786559
Déposant : Migration Prodinra <>
Soumis le : vendredi 5 juin 2020 - 00:21:20
Dernière modification le : jeudi 30 juillet 2020 - 10:56:15

Identifiants

  • HAL Id : hal-02786559, version 1
  • PRODINRA : 463554

Citation

Maé Guinet, Bernard Nicolardot, Cécile Revellin, Vincent Durey, Georg Carlsson, et al.. Quantification of nitrogen fluxes and explanatory plant traits during a two year legume-cereal rotation. 7ème Journée des Doctorants de l’UMR 1347 Agroécologie, May 2018, Dijon, France. ⟨hal-02786559⟩

Partager

Métriques

Consultations de la notice

15