Plantmonitoring op basis van fotosynthese sensoren : ontwikkelen en testen van sensoren

Anja Dieleman, Jan Bontsema, Henk Jalink, Jan Snel, Frank Kempkes, Jan Voogt, Sander Pot, Anne Elings, Vincent Jalink, Esther Meinen

Research output: Book/ReportReportProfessional


The basic process for crop growth and production is photosynthesis. Measuring crop photosynthesis is therefore important to monitor the status of the crop and whether the greenhouse climate is set to the needs of the crop. In this project, two monitoring systems for crop photosynthesis were developed and tested. (1) The crop photosynthesis monitor is a soft sensor that can calculate the CO2 uptake of an entire crop. The basis for these calculations are the balance between CO2 supply and CO2 loss via ventilation and crop photosynthesis. By measuring the CO2 concentration and humidity inside and outside the greenhouse, the crop photosynthesis can be calculated. (2) The CropObserver is a fluorescence sensor that measures the light use efficiency of photosynthesis of a large crop area (3 x 3 m2). The crop receives light pulses from a laser in the top of the greenhouse, the sensor measures the fluorescence signal of the crop. Both sensors were tested in a tomato crop in 2014 with promising results. The sensors functioned without problems and delivered patterns of daily photosynthesis which matched the reference measurements reasonably well up to well.
Original languageDutch
Place of PublicationBleiswijk
PublisherWageningen UR Glastuinbouw
Number of pages86
Publication statusPublished - 2016

Publication series

NameRapport GTB


  • protected cultivation
  • greenhouse horticulture
  • greenhouse technology
  • sensors
  • photosynthesis
  • carbon dioxide
  • energy
  • energy saving
  • lighting
  • artificial light
  • artificial lighting
  • ventilation
  • artificial ventilation
  • fluorescence
  • tomatoes
  • solanum lycopersicum

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