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@ARTICLE{Pohlmeier:365,
author = {Pohlmeier, A. and Oros-Peusquens, A.-M. and Javaux, M. and
Menzel, M. I. and Vanderborght, J. and Kaffanke, J. and
Romazetti, S. and Lindenmair, J. and Vereecken, H. and Shah,
J. N.},
title = {{C}hanges in {S}oil {W}ater {C}ontent {R}esulting from
{R}icinus {R}oot {U}ptake {M}onitored by {M}agnetic
{R}esonance {I}maging},
journal = {Vadose zone journal},
volume = {7},
issn = {1539-1663},
address = {Madison, Wis.},
publisher = {SSSA},
reportid = {PreJuSER-365},
pages = {1010 - 1017},
year = {2008},
note = {Record converted from VDB: 12.11.2012},
abstract = {Magnetic resonance imaging (MRI) was used to study the soil
water content changes caused by root water uptake. A
4-wk-old Ricinus communis carmencita with a highly developed
root system was planted in a cylindrical container filled
with a model soil ( $99.5\%$ fine sand, $0.5\%$ clay), fully
water saturated. The bottom and surface of the container
were sealed so that water loss by factors other than
transpiration via the leaves could be neglected. The water
content of the soil was monitored for 3 wk using the MRI
sequence SPRITE at an isotropic spatial resolution of 6.3
mm. In contrast to conventionally used MRI sequences, the
T-2* relaxation was monitored, temporally resolved, and
extrapolated to zero. This procedure is a better measure of
water content than a single signal at a given time point
since it eliminates varying MRI relaxation times during soil
desiccation. A linear correlation between the MRI-determined
and gravimetrically measured total water content proves the
correctness of the monitoring and data evaluation procedure.
Simultaneously, the root architecture was also imaged at 0.6
mm isotropic resolution by the MRI sequence constructive
interference in steady state (CISS), which yielded a good
contrast between soil and roots. The coregistration of both
types of imaging ( water content and root architecture)
indicates that greater changes in water content took place
in the bottom region and near the surface, where the highest
root densities were found.},
keywords = {J (WoSType)},
cin = {ICG-4 / INB-3 / ICG-3 / JARA-ENERGY / JARA-SIM},
ddc = {550},
cid = {I:(DE-Juel1)VDB793 / I:(DE-Juel1)INB-3-20090406 /
I:(DE-Juel1)ICG-3-20090406 / $I:(DE-82)080011_20140620$ /
I:(DE-Juel1)VDB1045},
pnm = {Terrestrische Umwelt / Funktion und Dysfunktion des
Nervensystems},
pid = {G:(DE-Juel1)FUEK407 / G:(DE-Juel1)FUEK409},
shelfmark = {Environmental Sciences / Soil Science / Water Resources},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000258444600006},
doi = {10.2136/vzj2007.0110},
url = {https://juser.fz-juelich.de/record/365},
}