An IoT System for the Measurement and the Interpretation of the Photosynthesis-Related CO₂ Fluxes

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Abstract
The estimation of the CO2 concentration variations due to plants photosynthesis has become a topic of outstanding interest in view of evaluating the carbon footprint of greenhouses and farms. In this framework, distributed sensing solutions can be an alternative to expensive and power-consuming gas analyzers. In this paper, a low-cost sensor node thought for the accurate monitoring of photosynthesis-related quantities (i.e., temperature, pressure, water vapor concentration and CO 2 concentration) is presented. The system is validated through measurement campaigns involving plants enclosed in an accumulation chamber in the presence of artificial light with controlled intensity, photoperiod and spectral composition. A simplified preliminary model is also proposed to interpret the obtained results from the point of view of the kinetics of the gas exchanges, achieving the estimation of the CO 2 uptake and release rates ascribable to the plants activity.
Funding Information
  • Agritech National Research Center through European Union Next-GenerationEU (Piano Nazionale di Ripresa e Resilienza (B63C22000640005)

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