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@ARTICLE{Liu:851713,
author = {Liu, Shurong and Schloter, M. and Brüggemann, N.},
title = {{A}ccumulation of {NO} 2 − during periods of drying
stimulates soil {N} 2 {O} emissions during subsequent
rewetting},
journal = {European journal of soil science},
volume = {69},
number = {5},
issn = {1351-0754},
address = {Oxford [u.a.]},
publisher = {Wiley-Blackwell},
reportid = {FZJ-2018-05245},
pages = {936 - 946},
year = {2018},
abstract = {Rewetting of soil might contribute considerably to the
annual production of nitrous oxide (N2O) in ecosystems
subjected to long dry periods. Therefore, it is crucial to
elucidate the most important factors responsible for large
pulses of N2O with rewetting. In this study, we carried out
a series of rewetting experiments with soil samples
collected from upland and riparian forest, grassland and
arable land. We analysed the dynamics of ammonium (NH4+),
nitrite (NO2−), nitrate (NO3−) and dissolved organic
matter (DOM) of air‐dried soil samples after rewetting. We
also analysed the effects of sterilization of soil samples
by γ‐irradiation on N2O production with rewetting.
Furthermore, we explored the effects of rewetting and
sterilization on the isotopic composition of N2O in the
different soil samples. The grassland soil produced the
largest amount of N2O (64.1 μg N kg−1) in 1 hour
on rewetting, followed by upland forest soil, whereas it was
least for soils from riparian forest and arable land. Gamma
irradiation, however, decreased soil N2O production from
forest soil samples by $30–90\%$ after rewetting, but
increased N2O production in grassland and arable land soils
three‐fold and two‐fold, respectively. Correlation
analysis revealed that NO2− concentration in the soil
samples at the time of rewetting was the most relevant
factor that explained soil N2O production after rewetting.
Furthermore, the addition of NO2− before rewetting
increased N2O production during rewetting more than with
additions of NO3− and NH4+ in all soil samples. The 15N
site preference values of N2O produced after rewetting were
close to 0‰, indicating a denitrification‐related
production process according to the classical view. However,
additional abiotic processes responsible for soil N2O
production during rewetting cannot be excluded.},
cin = {IBG-3},
ddc = {630},
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:000443387700016},
doi = {10.1111/ejss.12683},
url = {https://juser.fz-juelich.de/record/851713},
}