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Intensive slurry management and climate change promote nitrogen mining from organic matter-rich montane grassland soils

Schlingmann, Marcus; Tobler, Ursina; Berauer, Bernd; Garcia-Franco, Noelia; Wilfahrt, Peter; Wiesmeier, Martin; Jentsch, Anke; Wolf, Benjamin; Kiese, Ralf; Dannenmann, Michael

Abstract:
Aims
Consequences of climate change and land use intensification on the nitrogen (N) cycle of organic-matter rich grassland soils in the alpine region remain poorly understood. We aimed to identify fates of fertilizer N and to determine the overall N balance of an organic-matter rich grassland in the European alpine region as influenced by intensified management and warming.
Methods
We combined 15N cattle slurry labelling with a space for time climate change experiment, which was based on translocation of intact plant-soil mesocosms down an elevational gradient to induce warming of +1 °C and + 3 °C. Mesocosms were subject to either extensive or intensive management. The fate of slurry-N was traced in the plant-soil system.
Results
Grassland productivity was very high (8.2 t - 19.4 t dm ha$^{-1}$ yr$^{-1}$), recovery of slurry $^{15}$N in mowed plant biomass was, however, low (9.6–14.7%), illustrating low fertilizer N use efficiency and high supply of plant available N via mineralization of soil organic matter (SOM). Higher 15N recovery rates (20.2–31.8%) were found in the soil N pool, dominated by recovery in unextractable N. Total $^{15}$N recovery was approximately half of the applied tracer, indicating substantial loss to the environment. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000124656
Veröffentlicht am 15.10.2020
Originalveröffentlichung
DOI: 10.1007/s11104-020-04697-9
Scopus
Zitationen: 3
Dimensions
Zitationen: 5
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 0032-079X, 1573-5036
KITopen-ID: 1000124656
HGF-Programm 12.02.01 (POF III, LK 01) Effects of land use and climate change
Erschienen in Plant and soil
Verlag Springer
Band 456
Seiten 81–98
Vorab online veröffentlicht am 04.09.2020
Externe Relationen Abstract/Volltext
Nachgewiesen in Dimensions
Web of Science
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