Light is the lifeblood of plants, driving their growth and overall development. It serves as a vital energy source for photosynthesis and plays a crucial role in regulating various processes. In recent years, scientific research has begun to decode the significance of specific light wavelengths, including far red, in optimizing plant growth and maximizing yields.
Far red light is part of the electromagnetic spectrum, encompassing wavelengths ranging from 700 to 800 nanometers (nm). Plants perceive and respond to far red light using specialized photoreceptor proteins referred to as phytochromes. Phytochromes play a pivotal role in regulating plant growth and development by influencing germination, stem elongation, flowering, and photoperiodic responses.
Effects of Far Red Light on Plants:
Germination: Far red light has been observed to stimulate seed germination in several plant species. It enhances the speed and uniformity of germination, thereby improving crop establishment.
Stem Elongation: Stem elongation and internodal spacing is promoted by far red light, leading to taller plants. This response is particularly beneficial in indoor cultivation, where maximizing vertical space is often a priority.
Flowering and Photoperiodic Responses: Plants are sensitive to day length or photoperiod. By manipulating the duration of far red light exposure during the dark period (night interruption), growers can influence the flowering time of their plants. Far red light in this case holds the potential to accelerate flowering and enhance bud production.
Leaf Expansion: Far red light can contribute to increased leaf expansion and overall biomass accumulation, resulting in more robust and productive plants.
For indoor growers, manipulating light spectrum through the use of LEDs allows for the creation of specific light recipes. By providing the appropriate balance of far red light and other wavelengths, growers can stimulate desired morphological and physiological responses in plants, ultimately improving yield and quality.
Far red light represents a powerful tool in the arsenal of modern cultivation techniques. From optimizing germination and flowering to enhancing biomass accumulation, the application of 700-800 nanometer wavelengths holds great promise for maximizing the potential of a variety of crop species. As our understanding of plant photobiology continues to deepen, harnessing the potential of far red light will undoubtedly pave the way for more efficient, sustainable, and high-yielding cultivation practices in the future.
Horticulture Lighting Group currently offers three lamps that provide growers with far red light: HLG Scorpion Rspec FR, 700Rspec FR, and 320 Rspec FR. To learn more about the benefits of introducing this spectrum to your facility, contact us at 877-445-4533.