Journalartikel
Autorenliste: O'Neill, RM; Krol, DJ; Wall, D; Lanigan, GJ; Renou-Wilson, F; Richards, KG; Jansen-Willems, AB; Müller, C
Jahr der Veröffentlichung: 2021
Zeitschrift: Soil Biology and Biochemistry
Bandnummer: 152
ISSN: 0038-0717
Open Access Status: Hybrid
DOI Link: https://doi.org/10.1016/j.soilbio.2020.108066
Verlag: Elsevier
Abstract:
A laboratory incubation study was conducted on a temperate grassland soil to quantify the main mineral nitrogen (N) transformation rates and pathways via a(15)N tracing approach. Soil samples were taken from a long-term phosphorus (P) trial to investigate the effects on gross N-transformations under high and low phosphorus amendment. The soils were incubated over a 2-week period and treated with ammonium-nitrate (NH4NO3) which was applied to the soil both with and without a glucose amendment and labelled with N-15 either on the ammonium (NH4+) or nitrate (NO3) moiety at 50% atom enrichment. The results showed immobilisation to greatly outweigh mineralisation and that NO3 was predominantly produced via heterotrophic nitrification. Individual pathways for NO3 production were quantified including oxidation of NH4+, recalcitrant and labile organic N. Oxidation of labile organic N to NO3, a newly considered pathway, accounted for between 63 and 83% of total NO3 production across the various treatments and P levels. This process was significantly higher in the low-P rather than the high-P soils (p < 0.05), highlighting the effect of soil P on the microbial community.
Zitierstile
Harvard-Zitierstil: O'Neill, R., Krol, D., Wall, D., Lanigan, G., Renou-Wilson, F., Richards, K., et al. (2021) Assessing the impact of long-term soil phosphorus on N-transformation pathways using N-15 tracing, Soil Biology and Biochemistry, 152, Article 108066. https://doi.org/10.1016/j.soilbio.2020.108066
APA-Zitierstil: O'Neill, R., Krol, D., Wall, D., Lanigan, G., Renou-Wilson, F., Richards, K., Jansen-Willems, A., & Müller, C. (2021). Assessing the impact of long-term soil phosphorus on N-transformation pathways using N-15 tracing. Soil Biology and Biochemistry. 152, Article 108066. https://doi.org/10.1016/j.soilbio.2020.108066
