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@ARTICLE{VegaJarquin:811407,
author = {Vega-Jarquin, C. and Garcia-Mendoza, M. and Jablonowski, N.
and Luna-Guido, M. and Dendooven, L.},
title = {{R}apid immobilization of applied nitrogen in
saline–alkaline soils},
journal = {Plant and soil},
volume = {256},
number = {2},
issn = {0032-079X},
address = {Dordrecht [u.a.]},
publisher = {Springer Science + Business Media B.V},
reportid = {FZJ-2016-03891},
pages = {379 - 388},
year = {2003},
abstract = {The dynamics of inorganic N are important in soil, and this
applies particularly to the saline–alkaline soils of the
former lake Texcoco in Mexico with high pH and salinity
where a forestation program was started in the 1970s. In
soils of lake Texcoco, in Mexico, more than $50\%$ of
applied N could not be accounted for one day after
application of 200 mg kg−1 soil along with glucose
amendment. It was not clear whether this was due to abiotic
or biotic processes, the form of inorganic N applied or the
result of applying an easily decomposable substrate. We
investigated this by adding glucose and 200 mg kg−1 soil
as (NH4)2SO4-N or KNO3-N to sterilized and unsterilized
soil. The changes in inorganic and ninhydrin N, microbial
biomass C and production of CO2 were then monitored. Between
the time of applying N and extraction with 0.5 M K2SO4,
i.e., after ca 2 h, approximately 110 mg NH4+-N kg−1 dry
soil could not be accounted for in the unsterilized and
sterilized soil and that remained so for the entire
incubation in the sterilized soil. After 1 day this
increased to 140 mg NH4+-N kg−1 dry soil in the
unsterilized control and 170 mg NH4+-N kg−1 dry soil in C
amended soil. Volatilization of NH3 accounted for 56 mg
NH4+-N kg−1 so the rest appeared to be adsorbed on the
soil matrix. The NH3 volatilization and NH4+ fixed in the
soil matrix remained constant over time and no oxidation to
NO2− or NO3 − had occurred, so unaccounted N in
unsterilized soil was probably incorporated into the
microbial biomass in excess of what was required for
metabolic activity. The unaccounted N was ca 70 mg
NO3−–N in nitrate amended soil after 3 days and 138
NO3−–N when glucose was additionally added. Losses
through abiotic processes were absent as inferred from
changes in sterilized soil and the aerobic incubation
inhibited possible losses through denitrification. It was
inferred that NO3− that could not be accounted for was
taken up by micro-organisms in excess of what was required
for metabolic activity.},
cin = {IBG-2},
ddc = {570},
cid = {I:(DE-Juel1)IBG-2-20101118},
pnm = {582 - Plant Science (POF3-582)},
pid = {G:(DE-HGF)POF3-582},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000185919100014},
doi = {10.1023/A:1026182211065},
url = {https://juser.fz-juelich.de/record/811407},
}