[1057] - Changes in Soil Water Content Resulting from Ricinus Root Uptake Monitored by Magnetic Resonance Imaging

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Pohlmeier, A., Oros-Peusquens, A., Javaux, M., Menzel, M. I., Vanderborght, J., Kaffanke, J., Romanzetti , S., Lindenmair, J., Vereecken, H., Shah, N., 2008. Changes in Soil Water Content Resulting from Ricinus Root Uptake Monitored by Magnetic Resonance Imaging. Vadose Zone Journal, 7 (3), 1010 - 1017. DOI: 10.2136/vzj2007.0110.
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Title(s):Main Title: Changes in Soil Water Content Resulting from Ricinus Root Uptake Monitored by Magnetic Resonance Imaging
Description(s):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 T2* 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.
Identifier(s):DOI: 10.2136/vzj2007.0110
Responsible Party
Creator(s):Author: Andreas Pohlmeier
Author: Ana-Maria Oros-Peusquens
Author: Mathieu Javaux
Author: Marion I. Menzel
Author: Jan Vanderborght
Author: Joachim Kaffanke
Author: Sandro Romanzetti
Author: J. Lindenmair
Author: Harry Vereecken
Author: N.J. Shah
Publisher:Soil Science Society of America
TR32 Topic:Soil
Subject(s):CRC/TR32 Keywords: Soil Water Content, RWU, MRI
File Details
File Name:Pohlmeier_et_al_VZJ_2008.pdf
Data Type:Text
Size(s):8 Pages
File Size:1439 kB (1.405 MB)
Date(s):Available: 2008-08-01
Mime Type:application/pdf
Data Format:PDF
Download Permission:OnlyTR32
General Access and Use Conditions:According to the TR32DB data policy agreement.
Access Limitations:According to the TR32DB data policy agreement.
Licence:TR32DB Data policy agreement
North:-no map data
Measurement Region:None
Measurement Location:--None--
Specific Informations - Publication
Article Type:Journal
Source:Vadose Zone Journal
Number Of Pages:8
Page Range:1010 - 1017
Metadata Details
Metadata Creator:Tanja Kramm
Metadata Created:2014-09-18
Metadata Last Updated:2014-09-18
Funding Phase:1
Metadata Language:English
Metadata Version:V40
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