Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.2136/sssaj2007.0419
Titel (primär) Gross nitrogen transformations and related nitrous oxide emissions in an intensively used calcareous soil
Autor Wan, Y.; Ju, X.; Ingwersen, J.; Schwarz, U.; Stange, C.F.; Zhang, F.; Streck, T.
Quelle Soil Science Society of America Journal
Erscheinungsjahr 2009
Department BOPHY
Band/Volume 73
Heft 1
Seite von 102
Seite bis 112
Sprache englisch
Keywords NCP, North China Plain - SOM, soil organic matter - WFPS, water-filled pore space
Abstract A better understanding of the internal N cycle in agriculturally used soils is crucial for developing sustainable and environmentally friendly N fertilizer management and to propose effective N2O mitigation strategies. The present laboratory study quantifies gross nitrogen transformations in an intensively used agricultural soil of the North China Plain (NCP). It also elucidates the role of nitrification and denitrification in the emissions of the greenhouse gas N2O. In the lab, soil samples adjusted to a water-filled pore space (WFPS) of 40 or 60% were spiked with 15NH4NO3, NH415NO3, or 15NH415NO3 and incubated at 20°C for 10 d. One subset of the samples was amended with glucose. The size and 15N enrichment of the mineral N pools and N2O fluxes were determined at intervals of 0 to 10 d. The studied calcareous soil showed a very rapid nitrification of the applied NH4+, which disappeared during the first 3 d. Glucose enhanced mineralization of native soil organic matter (SOM), stimulated dissimilatory nitrate reduction to ammonium (DNRA), and promoted the immobilization-remineralization cycle. Throughout the incubation, nitrification, and denitrification occurred simultaneously. Nitrification was the dominant N2O-producing process and contributed 83.0 to 95.4% to the totally emitted N2O in the non-glucose soils. In contrast, the N2O emitted from 15NO3- pool increased after adding glucose, indicating that denitrification was C-limited in the studied soil.
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=690
Wan, Y., Ju, X., Ingwersen, J., Schwarz, U., Stange, C.F., Zhang, F., Streck, T. (2009):
Gross nitrogen transformations and related nitrous oxide emissions in an intensively used calcareous soil
Soil Sci. Soc. Am. J. 73 (1), 102 - 112 10.2136/sssaj2007.0419