The Effects of Varying Dark Cycles and Pulse Width Modulation on Fresh Weight in Helianthus Annuus Microgreens

The Effects of Varying Dark Cycles and Pulse Width Modulation on Fresh Weight in Helianthus Annuus Microgreens

© 2022 by IJETT Journal
Volume-70 Issue-12
Year of Publication : 2022
Author : Davie B. Balmadrid, Bobby D. Gerardo
DOI : 10.14445/22315381/IJETT-V70I12P232

How to Cite?

Davie B. Balmadrid, Bobby D. Gerardo, "The Effects of Varying Dark Cycles and Pulse Width Modulation on Fresh Weight in Helianthus Annuus Microgreens," International Journal of Engineering Trends and Technology, vol. 70, no. 12, pp. 338-344, 2022. Crossref,

To aid in the growth of microgreens, lighting factors like light quality, photoperiod, and light intensity are modified to achieve desired results for the plants. This research established the consequence of different dark cycles and pulse width modulation on the fresh weight of Helianthus annuus microgreens. A ratio of 75% red and 25% blue LED light was used to deliver five seconds of light cycles at 100 μmol m−2 s −1 of photosynthetic photon flux density (PPFD) to the tested plants. Central composite design (CCD) using the response surface methodology (RSM) was applied to derive thirteen lighting treatments. The result of the experiments showed that dark cycles of 11 – 15 seconds and PWM frequencies of 300-500 Hz at a 75% duty ratio achieved the maximum outcome. These values can be used on LED lighting systems to accomplish optimum production in the fresh weight of Helianthus annuus microgreens.

Dark cycles, Fresh weight, Light treatments, Microgreens, Pulse width modulation.

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