Efficacy of Nitrogen Uptake and Water Use Efficiency in Perennial Ryegrass Forage Production: Criteria for Evaluating Varietal Diversity
This study evaluates two integrative ecophysiological criteria—nitrogen nutrition index and carbon isotope discrimination—to assess varietal differences in nitrogen uptake efficiency and water use efficiency in perennial ryegrass under forage production conditions.
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Detail beschrijving
In breeding programs for perennial ryegrass, this study examined whether variation among cultivars in the nitrogen nutrition index (NNI) and in carbon isotope discrimination (δ13C) correlates with forage yield under dense micro-sward conditions. Results showed that NNI variability can predict yield differences when environmental constraints are minimal and plants compete for light. No direct correlation between δ13C and yield was found under the experimental conditions, but δ13C variation aligned with the geographic origin of the genetic material, indicating potential value for genetic resource management.
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Details bijdrage
- Project
- Locatie
- France
- Auteurs
- Jean-Paul SAMPOUX, Vincent BÉGUIER, Pascal BOURDON, Christophe GALBRUN, Marie-Christine GRAS, Didier NOËL, Waldemar PIETRASZEK, Laurence POINSARD, Bernard THARE
- Doel
- Adopt innovative practices
- Soort bestand
- document
- Gepubliceerd op
- 01 apr 2016
- Taal van herkomst
- French
- Officiële project website
- Innovations agronomiques
- Licensie
- CC BY