Plant nitrogen uptake preference and drivers in natural ecosystems at the global scale
© 2025 The Author(s). New Phytologist © 2025 New Phytologist Foundation.
| Publié dans: | The New phytologist. - 1979. - 246(2025), 3 vom: 08. Mai, Seite 972-983 |
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| Auteur principal: | |
| Autres auteurs: | , , , , , , |
| Format: | Article en ligne |
| Langue: | English |
| Publié: |
2025
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| Accès à la collection: | The New phytologist |
| Sujets: | Journal Article ammonium nitrate nitrogen deposition nitrogen uptake preference organic nitrogen stable isotopes Nitrogen N762921K75 Soil plus... |
| Résumé: | © 2025 The Author(s). New Phytologist © 2025 New Phytologist Foundation. Elucidating plant nitrogen (N) acquisition is crucial for understanding plant N strategies and ecosystem productivity. However, the variation in plant N uptake preference and its controlling factors on a global scale remain unclear. We conducted a global synthesis to explore plant N preference patterns and driving factors. Globally, the average contributions of ammonium (NH4 +), nitrate (NO3 -), and glycine N to the total plant N uptake were 41.6 ± 1.1%, 32.8 ± 1.2%, and 25.6 ± 0.9%, respectively. However, plant N uptake preferences differed significantly among climatic regions and vegetation types. Soil NH4 + was the most preferred N form by plants in (sub)tropical regions, whereas NO3 - preference was significantly higher in high-latitude than low-latitude regions. Plant functional type was one of the most important factors driving NO3 - preference, with significantly higher NO3 - preference of nonwoody species than broadleaf-evergreen, conifer, and shrub species. Organic N preference was lowest in (sub)tropics and significantly lower than that in temperate and alpine regions. This study shows clear climatic patterns and different influencing factors of plant NH4 + and NO3 - preference, which can contribute to the accurate prediction of N constraints on ecosystem productivity and soil carbon dynamics |
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| Description: | Date Completed 10.04.2025 Date Revised 10.04.2025 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1469-8137 |
| DOI: | 10.1111/nph.70030 |