The effect of adding violet LEDs to plant growth lights on plant growth

UV radiation reduces plant leaf area, inhibits hypocotyl elongation, reduces photosynthesis and productivity, makes plants vulnerable to pathogens, but induces flavonoid synthesis and defense mechanisms.

The UV-B band of the plant growth lamp can reduce the content of ascorbic acid and beta-carotene, but can effectively promote the synthesis of anthocyanin. UV-B radiation resulted in a dwarf plant phenotype, small, thick leaves, short petioles, increased axillary branching, and changes in root/shoot ratio.

The results of an investigation of 16 rice cultivars grown in greenhouses from 7 different regions in China, India, the Philippines, Nepal, Thailand, Vietnam and Sri Lanka showed that the addition of UV-B to the grow lights resulted in an increase in the amount of total biomass. There were 4 cultivars (of which only 1 reached a significant level, from Sri Lanka), and 12 cultivars (of which 6 reached a significant level); those cultivars that were sensitive to UV-B leaf area and tiller number were significantly reduced; 6 cultivars showed an increase in chlorophyll content (2 of which reached a significant level); 5 cultivars showed a significant decrease in leaf photosynthetic rate, and 1 cultivar showed a significant increase (its total biomass also increased significantly).
The UV-B/PAR ratio of grow lamps is an important determinant of the plant's response to UV-B. For example, UV-B and PAR work together to affect mint morphology and oil yield, and high-quality oil production requires high levels of unfiltered natural light.
It should be pointed out that laboratory studies of the effects of UV-B, although useful in identifying transcription factors and other molecular and physiological factors, use higher UV-B levels without the accompanying and Background PAR is often low, and results are often not mechanically extrapolated to the natural environment. Field studies typically utilize UV ​​lamps to increase or filters to decrease UV-B levels.

Light environment is one of the important physical environmental factors that are indispensable for plant growth and development. Controlling plant morphogenesis through light quality regulation is an important technology in the field of facility cultivation.

Full-spectrum plant light:

contains wavelengths of 400-420nm, which help to form anthocyanins and resist the elongation of branches and leaves.

The wavelength of 450-460nm can thicken stems and leaves, accelerate plant development, and regulate stomatal opening.

The wavelength of 550nm promotes the growth of oxygen and helps tissues better store nutrients.

The wavelength of 580nm can promote the growth of roots and early germination.

The wavelength of 650-660nm promotes the overall growth of plants, especially in the flowering and fruiting periods, increasing the growth rate (20 days earlier for flowering and 30 days for earlier harvest), and also increases the number of fruits by 25% to 35%, and reduces deformed fruits. incidence rate.

The absorption rate at 720~1000nm is low, which stimulates cell extension and affects flowering and seed germination.

The full-spectrum plant growth lamp is based on the law of plant growth and simulates the principle of solar spectrum ratio, and developed an artificial light source with full spectrum, with a wide radiation range, reaching more than 100LM per watt, and truly meeting the requirements of green lighting. For agricultural greenhouses, as a supplemental light, the light can be enhanced at any time of the day to always assist the plants in photosynthesis. Especially in the winter months, the effective lighting time can be extended. No matter at dusk or at night, it can effectively extend and scientifically control the light required by plants, and is not affected by any environmental changes.
In a greenhouse or plant laboratory, it can completely replace natural light to promote plant growth.
After application testing, the wavelength of Luyang full-spectrum grow light is very suitable for the growth, flowering and fruiting of plants. Generally, indoor plants and flowers will grow worse and worse over time. The main reason is the lack of sufficient light irradiation. Spectral irradiation required by plants can not only promote their growth, but also prolong the flowering period and improve the quality of flowers and trees.

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