Time-intensive geoelectrical monitoring under winter wheat

A - Papers appearing in refereed journals

Blanchy, G., Virlet, N., Sadeghi-Tehran, P., Watts, C. W., Hawkesford, M. J., Whalley, W. R. and Binley, A. 2020. Time-intensive geoelectrical monitoring under winter wheat . Near Surface Geophysics. https://doi.org/10.1002/nsg.12107

AuthorsBlanchy, G., Virlet, N., Sadeghi-Tehran, P., Watts, C. W., Hawkesford, M. J., Whalley, W. R. and Binley, A.
Abstract

Several studies have explored the potential of electrical resistivity tomography to monitor changes in soil moisture associated with the root water uptake of different crops. Such studies usually use a set of limited below-ground measurements throughout the growth season but are often unable to get a complete picture of the dynamics of the processes. With the development of high-throughput phenotyping platforms, we now have the capability to collect more frequent above-ground measurements, such as canopy cover, enabling the comparison with below-ground data. In this study hourly direct-current resistivity data were collected under the Field Scanalyzer platform at Rothamsted Research with different winter wheat varieties and nitrogen treatments in 2018 and 2019. Results from both years demonstrate the importance of applying the temperature correction to interpret hourly electrical conductivity data. Crops which received larger amounts of nitrogen showed larger canopy cover and more rapid changes in electrical conductivity, especially during large rainfall events. The varieties showed contrasted heights although this does not appear to have influenced electrical conductivity dynamics. The daily cyclic component of the electrical conductivity signal was extracted by decomposing the time series. A shift in this daily component was observed during the growth season. For crops with appreciable difference in canopy cover, high-frequency direct-current resistivity monitoring was able to distinguish the different below-ground behaviours.

KeywordsElectrical resistivity tomography; Hydrogeophysics; Near-surface
Year of Publication2020
JournalNear Surface Geophysics
Digital Object Identifier (DOI)https://doi.org/10.1002/nsg.12107
Open accessPublished as bronze (free) open access
FunderBiotechnology and Biological Sciences Research Council
Funder project or codeDFW - Designing Future Wheat - Work package 1 (WP1) - Increased efficiency and sustainability
Publisher's version
Accepted author manuscript
Output statusPublished
Publication dates
Online18 May 2020
Publication process dates
Accepted01 May 2020
ISSN1873-0604
PublisherWiley

Permalink - https://repository.rothamsted.ac.uk/item/97yv5/time-intensive-geoelectrical-monitoring-under-winter-wheat

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