The Effects of Different Light Spectrums on the Growth and Mineral Nutrition of Hydroponically Grown Barley Grass (Hordeum vulgare L.)

Document Type : Original paper


Akdeniz University Vocational High School of Technical Sciences, Antalya-Turkey


Background and aim: The effects of different light spectrum on the growth and nutrient content of hydroponically grown Barley grass (Hordeum vulgare L.) in indoor climate conditions were studied. Materials and methods: In the experiment, under three different LED-based lightings defined by the peak wavelengths of red (625-675 nm), blue (425-475 nm), and green (490-550 nm) light and at a photosynthetic photon flux density of 200-250 μmol m−2 s. were studied. Plant biometric parameters and mineral nutrient concentration of Barley grass were determined. The highest height, fresh weight, dry matter ratio and plant yield per unit area in Barley grass were achieved by the combination of red, blue and green light wavelengths. Lower height and fresh weight values were obtained in the combination of blue and green light. Results: The highest concentrations of plant nutrients in terms of mineral contents are in combinations of red, blue and green light; and the highest N content was determined under blue light. Fe content of Barley grass was higher under blue light; Zn, Mn, Cu and B nutrients were determined higher under red light. Conclusion: The results showed that in indoor plant artificial lighting, selected light spectrums can be used to optimize plant growth and mineral nutrition.


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Volume 1, Issue 3
(Special Issue: papers selected from ICLS22, Istanbul, Turkey)
Pages 96-103
  • Receive Date: 18 September 2022
  • Revise Date: 28 September 2022
  • Accept Date: 10 October 2022