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Zhu, Y.C.* ; Wan, L.* ; Xia, L.* ; Butterbach‐Bahl, K.* ; Dannenmann, M.* ; Scheer, C.* ; Ruehr, N.K.* ; Wolf, B.* ; Yan, X.* ; Wei, Z.* ; Reich, P.B.* ; Luo, Y.* ; Smith, P.* ; Peñuelas, J.* ; Schloter, M. ; Schulz, S. ; Kiese, R.*

Elevated CO2 and warming intensify plant reliance on soil nitrogen reserves despite intensive fertilization.

Nat. Commun. 17:5979 (2026)
Verlagsversion Forschungsdaten DOI PMC
Open Access Gold
Creative Commons Lizenzvertrag
Understanding how ecosystems sustain plant nitrogen (N) supply under climate change is critical, yet whether increasing plant N demand is met by external inputs or mobilization of soil N reserves remains unresolved. Here we show that climate change increases plant reliance on soil N reserves despite intensive fertilization. Using a two-year 15N-tracing experiment combining elevated CO2, warming, and drought in a montane grassland, we found that plants obtained 82-88% of their N from soil and acquired 4.6-7.3 times more N from soil than from fertilizer despite high N inputs. Elevated CO2 and warming increased plant uptake of soil-derived N but not fertilizer N. Consequently, plant N export exceeded fertilizer inputs, causing ecosystem N deficits and depletion of soil N stocks, with the strongest soil N mining under combined elevated CO2 and warming. Our findings reveal that climate change accelerates biological mining of soil N reserves, potentially constraining the long-term sustainability of intensively managed agroecosystems.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Schlagwörter Fertilizer ; Ecosystem ; Climate Change ; Nitrogen ; Human Fertilization ; Global Warming ; Nitrogen Fertilizer ; Nitrogen Cycle
ISSN (print) / ISBN 2041-1723
e-ISSN 2041-1723
Zeitschrift Nature Communications
Quellenangaben Band: 17, Heft: 1, Seiten: , Artikelnummer: 5979 Supplement: ,
Verlag Springer
Verlagsort London
Begutachtungsstatus Peer reviewed
Institut(e) Research Unit Comparative Microbiome Analysis (COMI)
Helmholtz AI - KIT (HAI - KIT)