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@ARTICLE{Squaris:12041,
author = {Séquaris, J.-M. and Herbst, M. and Weihermüller, L. and
Bauer, J. and Vereecken, H.},
title = {{S}imulating decomposition of 14{C}-labelled fresh organic
matter in bulk soil and soil particle fractions at various
temperatures and moisture contents},
journal = {European journal of soil science},
volume = {61},
issn = {1351-0754},
address = {Oxford [u.a.]},
publisher = {Wiley-Blackwell},
reportid = {PreJuSER-12041},
pages = {940 - 949},
year = {2010},
note = {Record converted from VDB: 12.11.2012},
abstract = {14C-labelled fresh organic matter (FOM) was homogeneously
incorporated into an agricultural topsoil of small total
organic carbon (TOC) content in order to perform
decomposition batch experiments at temperatures (T) ranging
from 5 to 45°C and soil gravimetric water contents (w)
ranging from 7 to $35\%.$ After 4–6-month incubation
(tend), the residual 14C (Dend) was measured in bulk soil
(0–2000 µm) and soil particle size fractions of 0–53,
53–200 and 200–2000 µm by chemical dispersion and
sieving. The 14C-FOM decomposition kinetics from soil were
fitted either by a single first-order reaction (rate
constant, k0–2000) assuming only a one-pool model in the
bulk soil or by consecutive first-order reactions (rate
constants, k0–53 and k53–2000) assuming a two-pool model
in the bulk soil aggregate structure. In the latter case, a
two-step reaction mechanism involving a FOM particle-size
decrease along the soil fractions was considered where
k0–53 was assumed to be a limiting rate constant. The
14C-FOM decomposition kinetics was described for the
experimental temperature and water ranges by Arrhenius and
Michaelis-Menten relationships, respectively. Additionally,
the results obtained by the adapted Arrhenius
physicochemical relationship were compared with the function
proposed by Kirschbaum (1995). Scaling functions Tm and wm
were established and can be used to simulate FOM
decomposition rates under different temperature and moisture
level conditions. Modelling based on consecutive first-order
reactions supported the hypothesis that the circulation
(inflow and outflow) of C into the soil particle small-size
fractions (<53 µm) controls the total C mineralization.},
cin = {ICG-4 / JARA-ENERGY / JARA-HPC},
ddc = {630},
cid = {I:(DE-Juel1)VDB793 / $I:(DE-82)080011_20140620$ /
$I:(DE-82)080012_20140620$},
pnm = {Terrestrische Umwelt},
pid = {G:(DE-Juel1)FUEK407},
shelfmark = {Soil Science},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000284322200011},
doi = {10.1111/j.1365-2389.2010.01299.x},
url = {https://juser.fz-juelich.de/record/12041},
}