Highlighting Grapevine Root Activity During a Partial Root Zone Drying in Rhizotron Using Geo-electrical Methods
Abstract
Geoelectrical methods may provide non-invasive characterization and monitoring of root architecture and functioning, also supporting hydrological microscopic models of root water uptake (RWU). Latest experiments conducted by Peruzzo et al. (2019, Subm.) on maize and cotton plants questioned the reliability of the assumption made by Dalton et al. (1995). Recently, Mary et al. (2019) showed the long-term effects of irrigation practices on rooting depth of Citrus trees using a combination of electrical resistivity tomography (ERT) and mise-à-la-masse (MALM) technique.
The aim of this study is to demonstrate that both root architecture and hydraulic conductance influence the RWU distribution, and that such RWU distribution relates to the root current pathways measured with the MALM method. The experimental design includes the use of rhizotron to provide insights on how the MALM signals relates to the plant physiological state during the application of a partial root-zone drying. Expected results will be valuable to define the limits of the assumptions on root uptake of water and solutes and to further develop the present methodology for field-scale root phenotyping. References Dalton, F. N. (1995). In-situ root extent measurements by electrical capacitance methods. Plant and soil, 173(1), 157-165. Mary, B., Vanella, D., Consoli, S., & Cassiani, G. (2019). Assessing the extent of citrus trees root apparatus under deficit irrigation via multi-method geo-electrical imaging. Scientific reports, 9(1), 9913.- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFMNS31A0764M
- Keywords:
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- 0402 Agricultural systems;
- BIOGEOSCIENCES;
- 1835 Hydrogeophysics;
- HYDROLOGY;
- 1842 Irrigation;
- HYDROLOGY