EGU2020-17021
https://doi.org/10.5194/egusphere-egu2020-17021
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Design and Performance Evaluation of Internet of Things (IoT) Based Multifunctional Device for Plant Ecophysiology & Hydrology: Toward Stem Water Content & Sap Flow

Shahla Asgharinia1, Luca Belelli Marchesini2, Damiano Gianelle3, and Riccardo Valentini4
Shahla Asgharinia et al.
  • 1Department for Innovation in Biological, Agro-food and Forest Systems (DIBAF), Tuscia University, Viterbo (VT), Italy (asgharinia@unitus.it)
  • 2Department of Sustainable Ecosystems & Bioresources (DASB), Fondazione Edmund Mach, San Michele All' Adige (TN), Italy (luca.belellimarchesini@fmach.it)
  • 3Department of Sustainable Ecosystems & Bioresources (DASB), Fondazione Edmund Mach, San Michele All' Adige (TN), Italy (damiano.gianelle@fmach.it)
  • 4Department for Innovation in Biological, Agro-food and Forest Systems (DIBAF), Tuscia University, Viterbo (VT), Italy (rik@unitus.it)

Using IoT technologies represents a novel low cost and efficient tool for studies in many disciplines (plant ecophysiology and hydrology) to unravel the vulnerability of an ecosystem to climatic stress. Taking advantage of IoT, a new multifunctional device, the “TreeTalker”, was developed to monitor in real time physical and biological parameters of single trees as well as some additional ecosystem-related variables. Here, we present performance of the TreeTalker to illustrate mainly the role of stem water content and water transport in tree behavior and function with respect to internal and external forces. TreeTalker is designed based on Granier-type thermal dissipation probe (TDP) and a capacitance sensor to measure stem water content.

In this study, two main experiments are analyzed. In the first experiment, procedures for calibration and use of capacitance sensors are presented. Considering the effect of wood density on frequency data, calibration is performed on different species and diameter harvested stems to convert the sensor-reported values to stem volumetric water content. In the second experiment, application of 20 TreeTalkers with particular emphasis placed on measuring hourly, daily and monthly sap flow and stem water content fluctuations under well-irrigated and deficit-irrigated treatments of Juglans regia L. was conducted on a study site in northeast of Italy.  

The results show that the range of stem water content is highly influenced by environmental factors. Stem water content has a significant portion of the daily tree water uptake. Low water storage occurs in response to drought and less soil water availability, which clarifies the high dependency of trees on stem water content under deficit-irrigated treatments. The diurnal-nocturnal pattern of stem water content and sap flow revealed an inverse relation. Such finding, still under investigation is explained by the important water recharge during the night, likely due to stem volume changes and lateral water distribution rather than by vertical flow rate. 

How to cite: Asgharinia, S., Belelli Marchesini, L., Gianelle, D., and Valentini, R.: Design and Performance Evaluation of Internet of Things (IoT) Based Multifunctional Device for Plant Ecophysiology & Hydrology: Toward Stem Water Content & Sap Flow , EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-17021, https://doi.org/10.5194/egusphere-egu2020-17021, 2020

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Display material version 1 – uploaded on 30 Apr 2020
  • CC1: Comment on EGU2020-17021, Teresa Gimeno, 05 May 2020

    Hi again Shahla,

    Thanks for answering my question, quick follow up: how often do you need to replace those batteries?

    Thanks in advance,

    Teresa

    • AC1: Reply to CC1, Shahla Asgharinia, 05 May 2020

      Hi Dear, 

      It depends on climatic conditions, but in general, it lasts from 30 to 60 days. 

      Regards 

      Shahla 

      • CC2: Reply to AC1, Teresa Gimeno, 06 May 2020

        Thank you!

         

        Teresa