Effects of grass species and grass growth on atmospheric nitrogen deposition to a bog ecosystem surrounded by intensive agricultural land use

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Hurkuck , M , Bruemmer , 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 ' Ecology and Evolution , vol. 5 , no. 13 , pp. 2556-2571 . DOI: 10.1002/ece3.1534

Title: Effects of grass species and grass growth on atmospheric nitrogen deposition to a bog ecosystem surrounded by intensive agricultural land use
Author: Hurkuck, Miriam; Bruemmer, Christian; Mohr, Karsten; Spott, Oliver; Well, Reinhard; Flessa, Heinz; Kutsch, Werner L.
Other contributor: University of Helsinki, Department
Date: 2015-07
Language: eng
Number of pages: 16
Belongs to series: Ecology and Evolution
ISSN: 2045-7758
DOI: https://doi.org/10.1002/ece3.1534
URI: http://hdl.handle.net/10138/209586
Abstract: We applied a N-15 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 102.7mg 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 138.2mgNpot(-1). Both species revealed a relationship between atmospheric N input and total biomass N contents. Airborne N deposition varied from about 24 to 55kgNha(-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 5-10kgNha(-1)yr(-1).
Subject: N-15 isotope dilution technique
biomonitoring
critical load
Eriophorum vaginatum
integrated total nitrogen input
Lolium multiflorum
nitrogen deposition
ombrotrophic bog
N-15 ISOTOPE-DILUTION
AMMONIA
VEGETATION
INPUT
SYSTEM
LEAVES
NH3
DIVERSITY
RYEGRASS
NITRATE
1172 Environmental sciences
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