Article
Mathematics, Applied
Hua Zhang, Hao Wang, Yongli Song, Junjie Wei
Summary: In this paper, a reaction-diffusion-advection model with memory-based diffusion and homogeneous Dirichlet boundary conditions is formulated. The existence of a nonconstant positive steady state is proven. The linear stability of the steady state is obtained by analyzing the eigenvalues of the associated linear operator, showing that the nonconstant steady state is always linearly stable regardless of the memory delay, while the model can also exhibit Hopf bifurcation as the memory delay varies. Moreover, theoretical and numerical results demonstrate that large advection eliminates oscillation patterns and drives species to concentrate downstream.
Article
Geography, Physical
Chenyang Xu, Shuangqiao Liao, Minghao Lin, Qian Yue, Jizhe Xia
Summary: Although pesticides are widely used to enhance crop yield, they are harmful to the environment and human health. This study developed a simplified plant uptake model to estimate pesticide absorption by plants from soil based on plant transpiration. Using remote sensing techniques and MODIS data, the model generated spatiotemporal patterns of pesticide contamination.
INTERNATIONAL JOURNAL OF DIGITAL EARTH
(2023)
Article
Agronomy
Amit Paporisch, Yael Laor, Baruch Rubin, Hanan Eizenberg
Summary: This study analyzed the effect of weather conditions on the fate of sulfosulfuron in soil and the predicted control efficacy of Egyptian broomrape in tomato using simulations. The results showed that cumulative precipitation was the main factor influencing the fate of sulfosulfuron and that precipitation during the 10-20 days before and after application significantly affected the control efficiency of broomrape on tomato plants.
PEST MANAGEMENT SCIENCE
(2021)
Article
Ecology
Fabienne Maignan, Camille Abadie, Marine Remaud, Linda M. J. Kooijmans, Kukka-Maaria Kohonen, Roisin Commane, Richard Wehr, J. Elliott Campbell, Sauveur Belviso, Stephen A. Montzka, Nina Raoult, Ulli Seibt, Yoichi P. Shiga, Nicolas Vuichard, Mary E. Whelan, Philippe Peylin
Summary: Land surface modellers rely on measurable proxies to estimate carbon dioxide assimilated by continental plants through photosynthesis. Carbonyl sulfide (COS) has been proposed as one potential proxy for gross primary production (GPP). This study refines the COS-GPP relationship and implements a mechanistic model in the ORCHIDEE land surface model, resulting in more accurate estimates of global COS uptake by vegetation. The comparison of different approaches for COS flux simulations and evaluations at NOAA sites shows the importance of accurately estimating COS concentrations for constraining GPP in global-scale land surface models.
Article
Agronomy
Jingyuan Xue, Qin Na, Xuyang Zhang, Michael L. Grieneisen, Quan Lai, Minghua Zhang
Summary: The web-based interface CalBMP was developed for predicting the effectiveness of best management practices (BMPs) in California. The results showed that CalBMP could reasonably simulate runoff and adsorbed pesticide loss, but might underestimate sediment erosion and pesticides with high solubility. A strawberry field study demonstrated the capability of CalBMP for simulating BMP effectiveness. The tool provides useful information on pesticide runoff potential and BMP selection at the field scale.
AGRICULTURAL WATER MANAGEMENT
(2023)
Article
Environmental Sciences
Aseel Eid, Isha Mhatre-Winters, Ferass M. Sammoura, Melissa K. Edler, Richard von Stein, Muhammad M. Hossain, Yoonhee Han, Miriam Lisci, Kristina Carney, Mary Konsolaki, Ronald P. Hart, Joan W. Bennett, Jason R. Richardson
Summary: This study investigated the effects of DDT exposure on the amyloid pathway using multiple in vitro and in vivo models. The results showed that DDT increased the levels of APP and Aβ, and led to the loss of synaptic markers. These findings, combined with previous epidemiological research, provide a mechanistic framework by which DDT exposure may contribute to increased risk of AD by impacting the amyloid pathway.
ENVIRONMENTAL HEALTH PERSPECTIVES
(2022)
Article
Environmental Sciences
Rui Chen, Nuo Cheng, Guoyu Ding, Fumin Ren, Jungang Lv, Rongguang Shi
Summary: Heavy metals can be adsorbed by crop roots and pose health risks when consumed. Understanding the enrichment model of heavy metals in crops is crucial for health management. The study established an accurate predictive model based on bioconcentration factors, demonstrating the effectiveness of the DGT method in predicting heavy metal uptake in crops.
ENVIRONMENTAL POLLUTION
(2021)
Letter
Environmental Sciences
Markus Flury, Venkat Lakshmi, Ning Lu, Jan Vanderborght
VADOSE ZONE JOURNAL
(2023)
Article
Agronomy
Andrea Schnepf, Christopher K. Black, Valentin Couvreur, Benjamin M. Delory, Claude Doussan, Adrien Heymans, Mathieu Javaux, Deepanshu Khare, Axelle Koch, Timo Koch, Christian W. Kuppe, Magdalena Landl, Daniel Leitner, Guillaume Lobet, Felicien Meunier, Johannes A. Postma, Ernst D. Schaefer, Tobias Selzner, Jan Vanderborght, Harry Vereecken
Summary: This study evaluated and compared the root water uptake capabilities of five well-established functional-structural root architecture models. The models performed well in both basic tests and tests involving the coupling of soil and roots, accurately simulating water flow and root water uptake. During the evaluation process, each model gained insights into its strengths and challenges, leading to improvements in some of the codes. The results of these models can be added to the GitHub repository at any time for future comparisons.
Article
Water Resources
Alexandre Belleflamme, Klaus Goergen, Niklas Wagner, Stefan Kollet, Sebastian Bathiany, Juliane El Zohbi, Diana Rechid, Jan Vanderborght, Harry Vereecken
Summary: In the context of repeated droughts in central Europe, climate-resilient management of water resources has gained importance. To achieve this, a new simulation setup using ParFlow/CLM model at high resolution was proposed. The setup allows for monitoring and forecasting of subsurface water states and fluxes, showcasing good results for various components of the terrestrial water cycle. The workflow can be easily transferred to other regions with globally available data.
FRONTIERS IN WATER
(2023)
Article
Environmental Sciences
Jan Vanderborght, Daniel Leitner, Andrea Schnepf, Valentin Couvreur, Harry Vereecken, Mathieu Javaux
Summary: Plant water uptake and soil water status are essential for soil water balance and plant growth, which depend on atmospheric water demand and the accessibility of soil water to plant roots. The simulation model presented in this study describes water flow in the soil-plant system by considering both root and soil hydraulic properties. By upscaling three-dimensional flow in the soil towards root segments, the model accounts for linear flow between horizontal soil layers and radial flow to root segments. This upscaled model avoids simplifying assumptions about root hydraulic properties and accurately simulates xylem water potentials and soil-root interface potentials, showing significant variations and deviations from bulk soil water potentials under dry soil conditions. Considering hydraulic gradients in the soil around root segments leads to a slower reduction of transpiration during drought periods and better plant water status with higher nighttime plant water potentials.
VADOSE ZONE JOURNAL
(2023)
Article
Multidisciplinary Sciences
Lena Laerm, Felix Maximilian Bauer, Normen Hermes, Jan van der Kruk, Harry Vereecken, Jan Vanderborght, Thuy Huu Nguyen, Gina Lopez, Sabine Julia Seidel, Frank Ewert, Andrea Schnepf, Anja Klotzsche
Summary: The production of crops is crucial for ensuring the human food supply, but climate change presents new challenges. This study collects root and soil data to explore crop responses to the changing environment. Two minirhizotron facilities were used to obtain a comprehensive collection of root and soil data, which can be utilized to investigate processes within the soil-plant continuum and analyze root images.
Article
Agronomy
Xiao-Ran Zhou, Andrea Schnepf, Jan Vanderborght, Daniel Leitner, Harry Vereecken, Guillaume Lobet
Summary: This study uses computational plant models to understand the influence of local phloem anatomical features on root system architecture and provides a plausible mechanistic explanation for experimental results through simulating the mutual interplay between root system development and carbohydrate distribution.
Article
Agronomy
Mona Giraud, Samuel Le Gall, Moritz Harings, Mathieu Javaux, Daniel Leitner, Felicien Meunier, Youri Rothfuss, Dagmar van Dusschoten, Jan Vanderborght, Harry Vereecken, Guillaume Lobet, Andrea Schnepf
Summary: A plant's development is closely related to the water and carbon flows in its environment. Climate change can alter these flows and affect plant phenotypes. The study presents a comprehensive model that simulates the feedback loops between a plant's development and water and carbon flows. The results showed that drought reduces water-use efficiency and limits the availability of sucrose for growth.
Article
Environmental Sciences
Mehdi Rahmati, Alexander Graf, Christian Poppe Teran, Wulf Amelung, Wouter Dorigo, Harrie-Jan Hendricks Franssen, Carsten Montzka, Dani Or, Matthias Sprenger, Jan Vanderborght, Niko E. C. Verhoest, Harry Vereecken
Summary: Despite previous reports of lengthening growing seasons in Europe due to global warming, recent evidence shows that the trend has reversed in the past decade. Early greening still occurs, but at slower rates, while a shift in the timing of dormancy has caused a decrease in season length. This is primarily due to higher atmospheric water demand in summer, which suppresses transpiration.
COMMUNICATIONS EARTH & ENVIRONMENT
(2023)
Editorial Material
Environmental Sciences
Mehdi Rahmati, Dani Or, Wulf Amelung, Sara L. Bauke, Roland Bol, Harrie-Jan Hendricks Franssen, Carsten Montzka, Jan Vanderborght, Harry Vereecken
NATURE REVIEWS EARTH & ENVIRONMENT
(2023)
Article
Agronomy
Tobias Selzner, Jannis Horn, Magdalena Landl, Andreas Pohlmeier, Dirk Helmrich, Katrin Huber, Jan Vanderborght, Harry Vereecken, Sven Behnke, Andrea Schnepf
Summary: This study evaluates a 2-step workflow for automated root system architecture (RSA) reconstruction using magnetic resonance imaging (MRI). The first step involves segmentation of MRI images into root and soil using a 3D U-Net, while the second step utilizes an automated tracing algorithm to reconstruct the root systems. The results show that the U-Net segmentation offers significant benefits in terms of reconstruction speed and root length.
Article
Environmental Sciences
Lena Larm, Felix Maximilian Bauer, Jan van der Kruk, Jan Vanderborght, Shehan Morandage, Harry Vereecken, Andrea Schnepf, Anja Klotzsche
Summary: Non-invasive imaging techniques were used to study root and soil water distribution within the soil-plant continuum. The presence of roots was found to increase the variability of soil permittivity, possibly due to the redistribution of soil water. This study provides valuable insights for optimizing agricultural practices such as irrigation and fertilization.
VADOSE ZONE JOURNAL
(2023)