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Title (Primary) Effects of grass species and grass growth on atmospheric nitrogen deposition to a bog ecosystem surrounded by intensive agricultural land use
Author Hurkuck, M.; Brümmer, C.; Mohr, K.; Spott, O.; Well, R.; Flessa, H.; Kutsch, W.L.;
Journal Ecology and Evolution
Year 2015
Department BOPHY;
Volume 5
Issue 13
Language englisch;
POF III (all) T31;
Keywords 15N isotope dilution technique; biomonitoring; critical load; Eriophorum vaginatum ; integrated total nitrogen input; Lolium multiflorum ; nitrogen deposition; ombrotrophic bog
UFZ wide themes RU1
Abstract

We applied a 15N dilution technique called “Integrated Total Nitrogen Input” (ITNI) to quantify annual atmospheric N input into a peatland surrounded by intensive agricultural practices over a 2-year period. Grass species and grass growth effects on atmospheric N deposition were investigated using Lolium multiflorum and Eriophorum vaginatum and different levels of added N resulting in increased biomass production. Plant biomass production was positively correlated with atmospheric N uptake (up to 102.7 mg N pot−1) when using Lolium multiflorum. In contrast, atmospheric N deposition to Eriophorum vaginatum did not show a clear dependency to produced biomass and ranged from 81.9 to 138.2 mg N pot−1. Both species revealed a relationship between atmospheric N input and total biomass N contents. Airborne N deposition varied from about 24 to 55 kg N ha−1 yr−1. Partitioning of airborne N within the monitor system differed such that most of the deposited N was found in roots of Eriophorum vaginatum while the highest share was allocated in aboveground biomass of Lolium multiflorum. Compared to other approaches determining atmospheric N deposition, ITNI showed highest airborne N input and an up to fivefold exceedance of the ecosystem-specific critical load of 5–10 kg N ha−1 yr−1.

ID 16249
Persistent UFZ Identifier http://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=16249
Hurkuck, M., Brümmer, C., Mohr, K., Spott, O., Well, R., Flessa, H., Kutsch, W.L. (2015):
Effects of grass species and grass growth on atmospheric nitrogen deposition to a bog ecosystem surrounded by intensive agricultural land use
Ecol. Evol. 5 (13), 2556 - 2571