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Estimating nitrogen flows of agricultural soils at a landscape level – A modelling study of the Upper Enns Valley, a long-term socio-ecological research region in Austria

Schroeck, A. M.; Gaube, V.; Haas, Edwin; Winiwarter, W.

Abstract:
This paper explores the fate of reactive nitrogen (Nr) on the landscape scale of present agricultural production practice on arable and grassland soils. We use the soil modelling tool LandscapeDNDC (landscape scale DeNitrification-DeComposition model) to quantify resulting flows of Nr distributed to the atmosphere, hydrosphere and the crops. Test area is a watershed in the Austrian Alps characterized by arable production in the low-lying areas and grassland in the mountains. The approach considers an overall budget of nitrogen, and determines the nitrogen use efficiency for individual crops and crop rotations, with average levels found at 85% for the arable area and 68–98% for the grassland areas. Modelled Nr flows are compared to the values resulting from the national emission factor (EF) method used for the Austrian emission inventory. For the arable part of the study region, the annual sum of released Nr emissions derived from LandscapeDNDC modelling is lower than the result of the EF method by about 13% (or 7 kg N ha$^{−1}$). Model results are lower also for other Nr species, yet nitrate leaching rates as well as ammonia emissions contribute a major share. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000091574
Veröffentlicht am 05.08.2019
Originalveröffentlichung
DOI: 10.1016/j.scitotenv.2019.02.071
Scopus
Zitationen: 2
Web of Science
Zitationen: 2
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2019
Sprache Englisch
Identifikator ISSN: 0048-9697, 1879-1026
KITopen-ID: 1000091574
HGF-Programm 12.02.01 (POF III, LK 01)
Effects of land use and climate change
Erschienen in The science of the total environment
Band 665
Seiten 275-289
Schlagwörter Soil emission modelling, DNDC, Nitrogen use efficiency, Nitrogen budget, Nitrous oxide emission hot spots, LTSER
Nachgewiesen in Web of Science
Scopus
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