Effective supplementation of the sunlight available to plants in greenhouses

Large seasonal changes in sunlight and its spectral composition are challenging for greenhouse growers in commercial horticulture. This is particularly true for growers at high latitudes like Finland.

Better informing growers of the light environment within greenhouses throughout the year and how the of use of lamps with bespoke spectra, and output optimised for specific crop species, allows efficiency saving to be made.

Blue:green (B:G) ratio in sunlight , in a polytunnel and glass greenhouse in Raleigh, North Carolina, USA.

At GreenSys 2019 in Anger, France 16-20 June 2019, Titta Kotilainen will present our research showing how greenhouse lighting subjects plants to different light spectra for photosynthesis depending on the time of year and location of greenhouses.

Titta Kotilainen will discuss how better selection and management of the light environment, through greenhouse materials, shade screens and insect nets, and appropriate lighting, improves crop yield and reduces energy costs.

  • Robson TM, Kotilainen TK. (2018) Transmittance of spectral irradiance by climate screens and nets used in horticulture and agriculture (Version 1.1.1) [Data set]. Zenodo. http://doi.org/10.5281/zenodo.1561317
  • Kotilainen TK, Robson TM, Hern├índez R. (2018) Light quality characterization under climate screens and shade nets for controlled-environment agriculture. PLoS ONE 13(6): e0199628. https://doi.org/10.1371/journal.pone.0199628

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