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@ARTICLE{Liu:172068,
author = {Liu, Shurong and Hu, Ronggui and Cai, Gaochao and Lin, Shan
and Zhao, Jinsong and Li, Yayu},
title = {{T}he role of {UV}-{B} radiation and precipitation on straw
decomposition and topsoil {C} turnover},
journal = {Soil biology $\&$ biochemistry},
volume = {77},
issn = {0038-0717},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2014-05612},
pages = {197 - 202},
year = {2014},
abstract = {In arid and semi-arid area, ultraviolet-B (UV-B) radiation
plays a mainly positive role in litter decomposition. In
subtropical area, however, the role of UV-B radiation
remains uncertain due to the interference of precipitation.
To evaluate the potential contribution of precipitation to
the role of UV-B radiation, we exposed 84 bags of rice straw
to ambient and reduced UV-B radiation, with and without
water addition after each precipitation event, on the roof
of a building at Huazhong Agricultural University (Wuhan,
China). Additionally, the indirect effects of UV-B radiation
on soil dissolved organic carbon (DOC) were investigated by
placing 70-g soil samples beneath 5-g straw bags with
precipitation treatments. Mass loss, DOC and water
extractable phenols (WEP) were monitored over 228 days.
Subsequently, microbial facilitation was studied, by
incubating straw and soil samples exposed for the longest
period (228 days) in the laboratory at 25 °C, and by
afterwards analyzing their CO2–C emission. Our results
demonstrated that UV-B radiation did not significantly
affect straw mass loss, but induced an increase in straw
DOC, WEP and CO2–C emission by $20.6\%,$ $10.7\%$ and
$20.4\%,$ respectively, under dry conditions. Whereas,
combined with precipitation, the effects of UV-B radiation
on straw DOC, WEP and CO2–C emission were negligible. Only
a small decrease in soil DOC $(9.9\%)$ and CO2–C $(4.0\%)$
was observed. Furthermore, UV-B radiation interacted
significantly with precipitation during straw decomposition.
These results indicate that for dry conditions UV-B
radiation accelerates straw decomposition by increasing DOC
content. For wet conditions, however, the effects of UV-B
radiation on straw decomposition are balanced out and even
negative on topsoil C turnover.},
cin = {IBG-3},
ddc = {570},
cid = {I:(DE-Juel1)IBG-3-20101118},
pnm = {246 - Modelling and Monitoring Terrestrial Systems: Methods
and Technologies (POF2-246) / 255 - Terrestrial Systems:
From Observation to Prediction (POF3-255)},
pid = {G:(DE-HGF)POF2-246 / G:(DE-HGF)POF3-255},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000341556600022},
doi = {10.1016/j.soilbio.2014.06.009},
url = {https://juser.fz-juelich.de/record/172068},
}