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@ARTICLE{Wu:845569,
author = {Wu, Di and Zhao, Zichao and Han, Xiao and Meng, Fanqiao and
Wu, Wenliang and Zhou, Minghua and Brüggemann, Nicolas and
Bol, Roland},
title = {{P}otential dual effect of nitrification inhibitor
3,4-dimethylpyrazole phosphate on nitrifier denitrification
in the mitigation of peak {N} 2 {O} emission events in
{N}orth {C}hina {P}lain cropping systems},
journal = {Soil biology $\&$ biochemistry},
volume = {121},
issn = {0038-0717},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2018-02794},
pages = {147 - 153},
year = {2018},
abstract = {The winter wheat–summer maize rotation system in the
North China Plain is a major source of nitrous oxide (N2O)
emissions due to high nitrogen (N) fertilizer and irrigation
water inputs. However, a detailed understanding of the
contribution of N2O production sources is still limited
because of the complexity of N2O generation in soils and a
lack of relevant field studies. Moreover, the efficiency and
mechanisms of N2O mitigation approaches in this area, i.e.
the use of nitrification inhibitors, remains poorly
understood. To elucidate the N2O production pathways from
this rotation system and to evaluate the effect of a widely
used nitrification inhibitor 3,4-dimethylpyrazole phosphate
(DMPP) on mitigating N2O emissions, we monitored N2O fluxes
and analyzed isotopomer ratios of soil-emitted N2O during
one rotation year. Results indicate that the application of
DMPP significantly reduced N2O emissions by $67\%$ in the
winter wheat season and $47\%$ in the summer maize season.
Isotopomer analysis revealed that in the N-fertilized
treatment, nitrification and/or fungal denitrification
accounted for up to $36\%$ of the N2O emission peaks
observed after fertilization and irrigation events, whereas
the nitrifier denitrification pathway was likely to be the
major source, accounting for the remaining N2O emissions.
The high effectiveness of the nitrification inhibitor on
mitigating N2O emissions at high soil moisture may be
attributed to the dual inhibitory effect on nitrifier
denitrification, i.e. reducing the supply of nitrite, which
is the substrate of nitrifier denitrification and inhibiting
ammonia-oxidizing bacteria activities, which carry nitrifier
denitrification.},
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:000432884100020},
doi = {10.1016/j.soilbio.2018.03.010},
url = {https://juser.fz-juelich.de/record/845569},
}