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Methods and Technologies at the
Jülich Plant Phenotyping Centre

Cavity Resonator

Microwave based water and biomass determination

Tomatographie (Cavity Resonator) - MikrowellenresonanztomographieCopyright: Forschungszentrum Jülich - IBG-2: Pflanzenwissenschaften


Data Acquisition

  • positioning of the target plant or pot in a microwave resonator
  • acquisition of resonance frequency shift


Data analysis

  • biomass: determination of biomass increase dynamics via shoot water content correlation
  • soil water: regulation of soil water content setpoint via absolute water measurement in pot

Messung des Tagesverlaufs des  FrischgewichtsCopyright: Forschungszentrum Jülich - IBG-2: Pflanzenwissenschaften


Results (example)

Continuous non-invasive measurement of fresh weight to monitor diurnal growth of an intact tomato plant over a period of 4 d and. Air temperature and relative humidity were monitored in parallel. Grey areas indicate dark periods.



Menzel, M.I. et al. Non-Invasive Determination of Plant Biomass with Microwave Resonators. Plant, Cell and Environment 32 (2009), 368 - 379

Additional Information

 Jülich Plant Phenotyping Centre




a development of




Dr. Fabio Fiorani