Supplementation of red and blue light
Blue light – 400 – 500 nm – blue light is one of the two main factors influencing photosynthesis via chlorophyll. The blue light spectrum is largely responsible for improving plant quality – especially in deciduous crops.
Blue light causes a number of positive properties for the plant:
- causes the length of internodes to decrease, which makes the plants more bushy and compact,
- promotes the opening of the stomatal apparatus – which allows more CO2 to enter the leaves,
- drives the peak absorption of the chlorophyll pigment, which is needed for photosynthesis,
- has a positive effect on the setting of the circadian rhythm,
- produces healthier and richer in nutrients plants.
Red light – 630 – 660 nm – is necessary for stem growth and leaf expansion. This wavelength also regulates flowering, dormancy, and seed germination. Red light is very efficient in producing tall and vigorous plants in a short time.
See also!
Optical radiation and the light spectrum
Light as visible radiation, its division and influence on the plant.
Why is light so important to plants?
What is necessary for the proper functioning of plants? Is all light good?
Chlorophylls and their absorption spectrum
Why are the leaves green? Color perception and how it relates to light absorption.
PPF and PPFD - the most important parameters of your lighting
What do plants eat? What do the two most important parameters in plant lighting mean?
Light supplementation in the greenhouse.
How to illuminate crops when they already have access to daylight.
DLI - Daily Light Integral
An indicator showing the daily amount of light supplied to plants during the year.