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@ARTICLE{Ni:904463,
author = {Ni, Bang and Zhang, Wei and Xu, Xiuchun and Wang, Ligang
and Bol, Roland and Wang, Kaiyong and Hu, Zhengjiang and
Zhang, Haixia and Meng, Fanqiao},
title = {{E}xponential relationship between {N}2{O} emission and
fertilizer nitrogen input and mechanisms for improving
fertilizer nitrogen efficiency under intensive plastic-shed
vegetable production in {C}hina: {A} systematic analysis},
journal = {Agriculture, ecosystems $\&$ environment},
volume = {312},
issn = {0167-8809},
address = {Amsterdam [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2021-06033},
pages = {107353 -},
year = {2021},
abstract = {Currently, China has approximately four million hectares of
intensively cultivated plastic-shed vegetable production,
i.e., with excessive nitrogen (N) fertilization and high
irrigation. Plastic-shed vegetable production has helped
meet the rapidly increasing consumer demand for fresh
vegetables while improving heat, light, and land utilization
efficiencies, resulting in very high vegetable yield. We
collected all studies from the 1980s to 2020 on N2O
emissions and N fertilization associated with plastic-shed
vegetable production at 40 field sites in China. Fertilizer
N utilization efficiencies and N2O emissions that were
affected by fertilizer N rate and type, irrigation, growth
duration, nitrification inhibitors, and soil properties were
systematically examined. The results revealed that
fertilizer N efficiencies in plastic-shed vegetable
production significantly decreased with increasing N
fertilization rate. The average N recovery efficiency (REN)
and apparent N use efficiency (ANUE) were 6.8 $\%$ and 33
$\%,$ respectively; much lower than those of cereal crop
production in the same region. In fruit and leafy vegetable
production, N2O emissions exhibited an exponential and
linear relationship with the fertilizer N rate,
respectively, and the average contributions of fertilizer N
to N2O emissions were 68 $\%$ and 70 $\%,$ respectively.
Compared with synthetic N fertilizer or manure alone,
combination of synthetic fertilizer with animal manure
significantly increased the N2O emissions and emission
factors (EFs) at high N fertilization rates (>800 kg N
ha−1 season−1), but there were no significant
differences among fertilizer types at N rate <800 kg N
ha−1 season−1. Nitrification inhibitors reduced N2O
emissions by 24.0 $\%$ (95 $\%$ confidence intervals [CI]:
19.2 $\%–28.9$ $\%),$ and water-saving irrigation is the
other effective measure to reduce emissions. Plastic-shed
soils with neutral pH, high organic carbon content (> 30 g
kg−1), growth period of >100 d, and higher irrigation
increased the responses of N2O emission to N fertilization.
As plastic-shed soils are continuously and intensively
farmed, soil properties will be negatively affected, and
should be considered together with fertilization and
irrigation to maintain high vegetable yield and low N2O
emissions. Our study highlighted that the exponential
relationship was more appropriate to predict the N2O
emissions in plastic-shed vegetable production, and our
findings help to optimize fertilizer N input with
consideration of crop yield and greenhouse gas emission.},
cin = {IBG-3},
ddc = {640},
cid = {I:(DE-Juel1)IBG-3-20101118},
pnm = {2173 - Agro-biogeosystems: controls, feedbacks and impact
(POF4-217)},
pid = {G:(DE-HGF)POF4-2173},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000632877300006},
doi = {10.1016/j.agee.2021.107353},
url = {https://juser.fz-juelich.de/record/904463},
}