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Dinitrogen emissions: an overlooked key component of the N balance of montane grasslands

Zistl-Schlingmann, M.; Feng, J.; Kiese, R.; Stephan, R.; Zuazo, P.; Willibald, G.; Wang, C.; Butterbach-Bahl, K.; Dannenmann, M.

Abstract:
While emissions of nitric oxide (NO), ammonia (NH₃) and nitrous oxide (N₂O) from grassland soils have been increasingly well constrained, soil dinitrogen (N₂) emissions are poorly understood. However, N₂ losses might dominate total gaseous nitrogen (N) losses. Knowledge on N losses is key for the development of climate-adapted management that balances agronomic and environmental needs. Hence, we quantified all gaseous N losses from a montane grassland in Southern Germany both for ambient climatic conditions and for a climate change treatment (+ 2°C MAT, - 300 mm MAP). Monthly measurements of soil N₂ emissions of intact soil cores revealed that those exceeded by far soil N₂O emissions and averaged at 350 ± 101 (ambient climate) and 738 ± 197 lg N m¯²h¯¹ (climate change). Because these measurements did not allow to quantify emission peaks after fertilization, an additional laboratory experiment was deployed to quantify the response of NH₃, NO, N₂O, and N₂ emissions in sub daily temporal resolution to a typical slurry fertilization event (51 kg N ha¯¹). Our results revealed that total N gas losses amounted to roughly half of applied sl ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000092533
Veröffentlicht am 01.04.2019
Seitenaufrufe: 3
seit 02.04.2019
Downloads: 2
seit 02.04.2019
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU)
Publikationstyp Zeitschriftenaufsatz
Jahr 2019
Sprache Englisch
Identifikator ISSN: 0168-2563, 1573-515X
urn:nbn:de:swb:90-925330
KITopen-ID: 1000092533
Erschienen in Biogeochemistry
Band 143
Heft 1
Seiten 15-30
Vorab online veröffentlicht am 15.02.2019
Schlagworte Climate change, Denitrification, Dinitrogen, Nitrous oxide, Fertilizer emissions, temperate grassland
Nachgewiesen in Scopus
Web of Science
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