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Impacts of slurry acidification and injection on fertilizer nitrogen fates in grassland

Schreiber, Mirella 1; Bazaios, Elpida 1; Ströbel, Barbara 1; Wolf, Benjamin 1; Ostler, Ulrike 1; Gasche, Rainer 1; Schlingmann, Marcus; Kiese, Ralf ORCID iD icon 1; Dannenmann, Michael ORCID iD icon 1
1 Institut für Meteorologie und Klimaforschung – Atmosphärische Umweltforschung (IMK-IFU), Karlsruher Institut für Technologie (KIT)

Abstract:

Low nitrogen (N) use efficiency of broadcast slurry application leads to nutrient losses, air and water pollution, greenhouse gas emissions and—in particular in a warming climate—to soil N mining. Here we test the alternative slurry acidification and injection techniques for their mitigation potential compared to broadcast spreading in montane grassland. We determined (1) the fate of 15N labelled slurry in the plant-soil-microbe system and soil-atmosphere exchange of greenhouse gases over one fertilization/harvest cycle and (2) assessed the longer-term contribution of fertilizer 15N to soil organic N formation by the end of the growing season. The isotope tracing approach was combined with a space for time climate change experiment. Simulated climate change increased productivity, ecosystem respiration, and net methane uptake irrespective of management, but the generally low N2O fluxes remained unchanged. Compared to the broadcast spreading, slurry acidification showed lowest N losses, thus increased productivity and fertilizer N use efficiency (38% 15N recovery in plant aboveground plant biomass). In contrast, slurry injection showed highest total fertilizer N losses, but increased fertilization-induced soil organic N formation by 9–12 kg N ha1 season1. ... mehr

Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung – Atmosphärische Umweltforschung (IMK-IFU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2022
Sprache Englisch
Identifikator ISSN: 1385-1314, 0167-1731, 1573-0867, 2214-7055
KITopen-ID: 1000152071
HGF-Programm 12.11.23 (POF IV, LK 01) Adaptation of managed landscapes to climate change
Erschienen in Nutrient Cycling in Agroecosystems
Verlag Springer
Band 125
Heft 2
Seiten 171–186
Vorab online veröffentlicht am 15.10.2022
Schlagwörter 15N tracing, Organic fertilizer, SON formation, Methane, Nitrous oxide, Slurry treatment
Nachgewiesen in Web of Science
OpenAlex
Scopus
Dimensions
Globale Ziele für nachhaltige Entwicklung Ziel 6 – Sauberes Wasser und Sanitär-EinrichtungenZiel 13 – Maßnahmen zum Klimaschutz

Verlagsausgabe §
DOI: 10.5445/IR/1000152071
Veröffentlicht am 31.10.2022
Originalveröffentlichung
DOI: 10.1007/s10705-022-10239-9
Scopus
Zitationen: 6
Web of Science
Zitationen: 5
Dimensions
Zitationen: 6
Seitenaufrufe: 149
seit 31.10.2022
Downloads: 203
seit 31.10.2022
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