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@ARTICLE{Reichel:849681,
author = {Reichel, Rüdiger and Wei, Jing and Islam, Muhammad S. and
Schmid, Christoph and Wissel, Holger and Schröder, Peter
and Schloter, Michael and Brüggemann, Nicolas},
title = {{P}otential of {W}heat {S}traw, {S}pruce {S}awdust, and
{L}ignin as {H}igh {O}rganic {C}arbon {S}oil {A}mendments to
{I}mprove {A}gricultural {N}itrogen {R}etention {C}apacity:
{A}n {I}ncubation {S}tudy},
journal = {Frontiers in plant science},
volume = {9},
issn = {1664-462X},
address = {Lausanne},
publisher = {Frontiers Media},
reportid = {FZJ-2018-03817},
pages = {900},
year = {2018},
abstract = {Plants like winter wheat are known for their insufficient N
uptake between sowing and the following growing season.
Especially after N-rich crops like oilseed rape or field
bean, nitrogen retention of the available soil N can be
poor, and the risk of contamination of the hydrosphere with
nitrate (NO3-) and the atmosphere with nitrous oxide (N2O)
is high. Therefore, novel strategies are needed to preserve
these unused N resources for subsequent agricultural
production. High organic carbon soil amendments (HCA) like
wheat straw promote microbial N immobilization by
stimulating microbes to take up N from soil. In order to
test the suitability of different HCA for immobilization of
excess N, we conducted a laboratory incubation experiment
with soil columns, each containing 8 kg of sandy loam of an
agricultural Ap horizon. We created a scenario with high
soil mineral N content by adding 150 kg NH4+-N ha-1 to soil
that received either wheat straw, spruce sawdust or lignin
at a rate of 4.5 t C ha-1, or no HCA as control. Wheat straw
turned out to be suitable for fast immobilization of excess
N in the form of microbial biomass N (up to 42 kg N ha-1),
followed by sawdust. However, under the experimental
conditions this effect weakened over a few weeks, finally
ranging between 8 and 15 kg N ha-1 immobilized in microbial
biomass in the spruce sawdust and wheat straw treatment,
respectively. Pure lignin did not stimulate microbial N
immobilization. We also revealed that N immobilization by
the remaining straw and sawdust HCA material in the soil had
a greater importance for storage of excess N (on average 24
kg N ha-1) than microbial N immobilization over the 4
months. N fertilization and HCA influenced the abundance of
ammonia oxidizing bacteria and archaea as the key players
for nitrification, as well as the abundance of denitrifiers.
Soil with spruce sawdust emitted more N2O compared to soil
with wheat straw, which in relation released more CO2,
resulting in a comparable overall global warming potential.
However, this was counterbalanced by advantages like N
immobilization and mitigation of potential NO3- losses.},
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},
pubmed = {pmid:30002668},
UT = {WOS:000436569300001},
doi = {10.3389/fpls.2018.00900},
url = {https://juser.fz-juelich.de/record/849681},
}