Monitoring of root systems at the field scale by means of electrical impedance tomography: a numerical feasibility study
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Title: | Main Title: Monitoring of root systems at the field scale by means of electrical impedance tomography: a numerical feasibility study |
Description: | Abstract: The root system is an important component of the biosphere, linking the soil to the vegetation-atmosphere environment. To improve crop breeding, production and management, it is essential to gain a better understanding of root-soil interactions and associated processes. Here, root architecture, growth and activity play a key role. Measurement methods capable of imaging, characterizing and monitoring root structure and dynamics in a non-invasive manner are still lacking, in particular for field-scale investigations. Previous laboratory studies on crop root systems using electrical impedance tomography (EIT) provided first insights into the possible monitoring of root system extension and root physiological processes. EIT utilises low-frequency impedance measurements to image the spatial distribution of electrical conduction and polarisation properties, for example in terms of real and imaginary conductivity. The previous studies have indicated that the real conductivity is primarily sensitive to water content changes in the rhizosphere, while imaginary conductivity, originating from polarisation processes around and within individual root segments, captures information on root mass, root length and root activity. We therefore hypothesise that EIT can be used to image the spatial delineation of root systems as well as to monitor root physiological processes. With a view to establishing EIT as a tool for root system characterisation and monitoring at the field scale, we here present a numerical feasibility study focusing on achievable image resolution of the approach. Synthetic complex conductivity models representing a field with a sequence of crop root systems were generated employing varying electrical model parameterisations. The latter were adapted from available laboratory and field data to simulate realistic scenarios. Synthetic EIT measurements were then computed, contaminated with noise and subsequently inverted by means of finite-element based forward modelling and inversion codes. The imaging capability is assessed by comparing original and reconstructed complex conductivity models. Our results demonstrate that, for the considered model parameterisations, EIT image resolution is sufficient to delineate the extension of root systems of individual plants. The simulation results will be essential for improving survey design and measurement configurations in planned field experiments, which are currently in the implementation phase. |
Responsible Party
Creators: | Shari van Treeck (Author), Maximilian Weigand (Resource Provider), Andreas Kemna (Principal Investigator) |
Publisher: | Jahrestagung der DGG und AEF 2016, Münster |
Publication Year: | 2016 |
Topic
TR32 Topic: | Soil |
Related Subproject: | B6 |
Subjects: | Keywords: EIT, Geophysics, Field Scale, Soil-Plant Interaction |
File Details
Filename: | SvT_DGG_Poster.pdf |
Data Type: | Text - Text |
File Size: | 603 KB |
Date: | Available: 14.03.2016 |
Mime Type: | application/pdf |
Data Format: | |
Language: | English |
Status: | Completed |
Constraints
Download Permission: | Only Project Members |
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 |
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Specific Information - Presentation
Presenter: | Shari van Treeck |
Presentation Date: | 15th of March, 2016 |
Presentation Type: | Poster |
Event: | Jahrestagung der DGG und AEF |
Event Type: | Conference |
Event Location: | Münster |
Event Duration: | 14th of March, 2016 - 17th of March, 2016 |
Metadata Details
Metadata Creator: | Shari van Treeck |
Metadata Created: | 02.05.2016 |
Metadata Last Updated: | 02.05.2016 |
Subproject: | B6 |
Funding Phase: | 3 |
Metadata Language: | English |
Metadata Version: | V50 |
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Page Visits: | 422 |
Metadata Downloads: | 0 |
Dataset Downloads: | 2 |
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