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Research Article
Helena Jorda
Forschungszentrum Jülich GmbH: Forschungszentrum Julich GmbH
Corresponding Author
ORCiD: https://orcid.org/0000-0003-2619-9700
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A new root solute uptake model based on a lumped version of the Trapp model (Trapp, 2000) was implemented in a coupled version of R-SWMS-ParTrace models for 3-D water flow and solute transport in soil and roots. Solute uptake was modeled as two individual processes: advection with the transpiration stream and diffusion through the root membrane. We parameterized the model for a FOCUS scenario used in the European Union for pesticide registration. Simulation with a single root showed a good agreement with the results produced by the 1D PEARL model. Simulations with a complex root system predicted larger water uptake from the upper root zone, leading to larger pesticide uptake when pesticides are concentrated in the upper root zone. Dilution of root water concentrations at the top root zone with water with low pesticide concentration taken up from the bottom of the root zone lead to larger uptake of solute when uptake was simulated as a diffusive process. This illustrates the importance of modeling uptake mechanistically and considering root and solute physical and chemical properties, especially when root-zone pesticide concentrations are non uniform.
Keywords
mechanistic pesticide uptake model, 3-D root architectural model, advective uptake, diffusive uptake, PEARL model, FOCUS scenarios
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CURRENT STATUS: Under Review
Version 1
Posted 31 Mar, 2021
No community comments so far
Editorial decision: Major Revision
On 20 Apr, 2021
Reviewers invited
Invitations sent on 01 Apr, 2021
Reviews received
Received 28 Mar, 2021
Editor assigned
On 18 Mar, 2021
First submitted
On 15 Mar, 2021
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A new preprint design is coming!
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This preprint is under consideration at Environmental Science and Pollution Research. A preprint is a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Research Article
Helena Jorda
Forschungszentrum Jülich GmbH: Forschungszentrum Julich GmbH
Corresponding Author
ORCiD: https://orcid.org/0000-0003-2619-9700
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Under Review
Version 1
Posted 31 Mar, 2021
No community comments so far
Editorial decision: Major Revision
On 20 Apr, 2021
Reviewers invited
Invitations sent on 01 Apr, 2021
Reviews received
Received 28 Mar, 2021
Editor assigned
On 18 Mar, 2021
First submitted
On 15 Mar, 2021
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
License:
This work is licensed under a CC BY 4.0 License. Read Full License
A new root solute uptake model based on a lumped version of the Trapp model (Trapp, 2000) was implemented in a coupled version of R-SWMS-ParTrace models for 3-D water flow and solute transport in soil and roots. Solute uptake was modeled as two individual processes: advection with the transpiration stream and diffusion through the root membrane. We parameterized the model for a FOCUS scenario used in the European Union for pesticide registration. Simulation with a single root showed a good agreement with the results produced by the 1D PEARL model. Simulations with a complex root system predicted larger water uptake from the upper root zone, leading to larger pesticide uptake when pesticides are concentrated in the upper root zone. Dilution of root water concentrations at the top root zone with water with low pesticide concentration taken up from the bottom of the root zone lead to larger uptake of solute when uptake was simulated as a diffusive process. This illustrates the importance of modeling uptake mechanistically and considering root and solute physical and chemical properties, especially when root-zone pesticide concentrations are non uniform.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
This is a list of supplementary files associated with this preprint. Click to download.
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