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@ARTICLE{Wu:820633,
author = {Wu, Di and Senbayram, Mehmet and Well, Reinhard and
Brüggemann, Nicolas and Pfeiffer, Birgit and Loick, Nadine
and Stempfhuber, Barbara and Dittert, Klaus and Bol, Roland},
title = {{N}itrification inhibitors mitigate {N}$_{2}${O} emissions
more effectively under straw-induced conditions favoring
denitrification},
journal = {Soil biology $\&$ biochemistry},
volume = {104},
issn = {0038-0717},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2016-05902},
pages = {197 - 207},
year = {2017},
abstract = {The application of reactive nitrogen (N) in the form of
synthetic/organic fertilizers plays a central role in
supporting a larger human population, but also contributes
to global warming through the emission of nitrous oxide
(N2O). The use of nitrification inhibitors (NIs) has
repeatedly been shown to minimize N2O emissions; however,
their effectiveness in reducing N2O emissions varies greatly
under different environmental conditions. A better
understanding of how and to what extent NIs can mitigate
fertilizer-related soil-borne N2O emissions under a range of
different conditions is required. In the present study, we
carried out a soil incubation experiment in a fully
automated continuous-flow incubation system under conditions
favoring either nitrification- or denitrification-derived
N2O emissions. Additionally, the abundance of AOB amoA, and
AOA amoA genes was quantified and N2O isotopic signatures
were analyzed. We mixed a common NI (PIADIN®) with mineral
fertilizer (ammonium sulfate) and examined the N2O
mitigation potential of the NI in a fertilized sandy soil
(low denitrification potential) and a sandy soil mixed with
wheat straw (high denitrification potential) at $70\%$ water
holding capacity (WHC). In non-NI treatments, the addition
of straw led to a drastic increase of CO2 and N2O emissions
compared to the non-straw-amended soils, suggesting
stimulated microbial activity and higher denitrification
rate. The NI reduced N2O emissions in the straw-amended
treatment by $41\%,$ whereas in the treatment without straw
this was only $17\%.$ With the combination of N2O isotopic
signatures and functional gene abundances, fungal
denitrification was considered to be the major process
contributing to the higher N2O fluxes specifically in
straw-amended soils. Overall, our study indicated that NI
can be used as an effective method for mitigating N2O
emissions in cropland specifically when the denitrification
potential is high, e.g. in moist N-fertilized and
straw-amended soils.},
cin = {IBG-3},
ddc = {570},
cid = {I:(DE-Juel1)IBG-3-20101118},
pnm = {255 - Terrestrial Systems: From Observation to Prediction
(POF3-255)},
pid = {G:(DE-HGF)POF3-255},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000389555900019},
doi = {10.1016/j.soilbio.2016.10.022},
url = {https://juser.fz-juelich.de/record/820633},
}