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Dinitrogen (N$_{2}$) pulse emissions during freeze-thaw cycles from montane grassland soil

Wu, Xing; Chen, Zhe; Kiese, Ralf; Fu, Jin; Gschwendter, Silvia; Schloter, Michael; Liu, Chunyan; Butterbach-Bahl, Klaus; Wolf, Benjamin; Dannenmann, Michael

Short-lived pulses of soil nitrous oxide (N$_{2}$O) emissions during freeze-thaw periods can dominate annual cumulative N$_{2}$O fluxes from temperate managed and natural soils. However, the effects of freeze thaw cycles (FTCs) on dinitrogen (N$_{2}$) emissions, i.e., the dominant terminal product of the denitrification process, and ratios of N$_{2}$/N$_{2}$O emissions have remained largely unknown because methodological difficulties were so far hampering detailed studies. Here, we quantified both N$_{2}$ and N$_{2}$O emissions of montane grassland soils exposed to three subsequent FTCs under two different soil moisture levels (40 and 80% WFPS) and under manure addition at 80% WFPS. In addition, we also quantified abundance and expression of functional genes involved in nitrification and denitrification to better understand microbial drivers of gaseous N losses. Our study shows that each freeze thaw cycle was associated with pulse emissions of both N$_{2}$O andN$_{2}$, with soil N$_{2}$ emissions exceeding N$_{2}$O emissions by a factor of 5–30. Increasing soil moisture from 40 to 80% WFPS and addition of cow slurry increased the cumulative FTC N$_{2}$ emissions by 102% and 77%, respectively. ... mehr

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Postprint §
DOI: 10.5445/IR/1000120133
Veröffentlicht am 10.06.2020
DOI: 10.1007/s00374-020-01476-7
Zitationen: 3
Zitationen: 3
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: 0178-2762, 1432-0789
KITopen-ID: 1000120133
HGF-Programm 12.02.01 (POF III, LK 01) Effects of land use and climate change
Erschienen in Biology and fertility of soils
Verlag Springer
Band 56
Seiten 959–972
Vorab online veröffentlicht am 23.05.2020
Schlagwörter Freeze-thawcycles, Dinitrogen, Nitrous oxide, Denitrification, Functional genes,Soil moisture, Fertilization
Nachgewiesen in Scopus
Web of Science
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