The effect of spectral components on plant growth

The effect of spectral components on plant growth
Solar radiation is based on spectrum, light intensity, sunshine time, and affects plant growth
Development, solar radiation is the most direct and important factor affecting plant growth and development
One of the elements.
The solar radiation reaching the ground includes three parts: ultraviolet, visible and infrared
Minute. The spectral composition is an important ecological factor for plants. In the solar spectrum
Among them, the most important part for plant life is the visible part, but the ultraviolet)
And infrared also has a certain meaning.
Different wave bands stimulate and control plant tissues and organs
The impact of differentiation is also different.
Therefore, the solar spectrum determines the external shape of plant organs to some extent
And internal structure, have the role of form building.

The influence of light spectrum range on plant biology
280 ~ 315nm: minimal impact on morphology and physiological processes
315 ~ 400nm: Less absorption of chlorophyll, affecting photoperiod effect and preventing stem elongation
400 ~ 520nm: The absorption ratio of chlorophyll and carotenoids is the largest
The biggest impact
520 ~ 610nm: The absorption rate of the pigment is not high <====green light
610 ~ 720nm: The absorption rate of chlorophyll is low, and it has obvious effect on photosynthesis and photoperiod
720 ~ 1000nm: Low absorption rate, stimulate cell elongation, affect flowering and seed germination
>1000nm: converted into heat
400 ~ 520nm (blue) light and 610 ~ 720nm (red)  contribution the most to photosynthesis

The influence of different spectra of solar radiation on plants
The radiant energy with a wavelength greater than 1000 nm is absorbed by plants and converted into heat energy, affecting
Plant body temperature and transpiration can promote the accumulation of dry matter, but does not participate in photosynthesis
2. The radiant energy with a wavelength of 720~1000 nm only affects plant elongation, of which
The far-infrared light band plays an important role in the formation of light period and seeds, and controls
Blossom and fruit color.
3. Red light and orange light with a wavelength of 0.72~0.61μm can be strongly absorbed by chlorophyll.
In this case, it shows strong photoperiod and photosynthesis.
4. Light with wavelength of 0.61~0.51μm, mainly green light, weak photosynthesis.
5. Light with a wavelength of 0.51~0.40μm, mainly blue-violet light, is affected by chlorophyll and black
The element is strongly absorbed, showing strong photosynthesis and forming effects.
6. For light with a wavelength of 0.40~0.32μm, external radiation plays a role in shaping and coloring.
Plants become shorter, darker in color, thicker leaves, etc.
7. Ultraviolet rays with a wavelength of 0.32~0.28μm are harmful to most plants.
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The relationship between light source wavelength and plant growth
Red light (660nm) can promote the activity of plant chlorophyll and stimulate plants
Phytochrome (the biological clock of plants). Increase seed germination rate and accelerate plant leaves
The growth rate of the film.

Blue light (440-480nm) stimulates the operation of plant phytosensitizers and effectively enhances Hulu
The movement of carotenoids. Effectively accelerate the efficiency of plant photosynthesis. Trigger plant
The phototaxis of objects and high-energy light morphogenesis. Make the roots of plants grow better.

Green light (530nm) increases the combination of green light, which can effectively increase the growth of leaves and rhizomes
Increase the speed, increase the taste and luster of vegetables, effectively reduce the nitrate in vegetables
Salt content.