Talking about LED Plant Light Technology and Application
1) Which bands of light have an effect on plant growth?
2) What are the advantages of LED as a plant light?
3) How to choose LED light source parameters if LED is used as plant light?
4) What is the patent for the preparation of LED plant lights?
5) What does the current LED plant light look like?
1. Effect of light on plant growth
In the natural spectrum, the effects of different bands of spectrum on plant physiology are:
280 ~ 315nm have minimal impact on morphology and physiological processes;
315 ~ 400nnm chlorophyll absorption is less, affecting the photoperiod effect and preventing stem elongation;
400 ~ 520nm (blue light) chlorophyll and carotenoid absorption ratio is the largest, the greatest impact on photosynthesis;
The absorption rate of 520 ~ 610nm pigment is not high;
610 ~ 720nm (red light) chlorophyll absorption rate is low, which has a significant effect on photosynthesis and photoperiod effect;
720 ~ 1000nm absorption rate is low, stimulating cell elongation, affecting flowering and seed germination;
>1000nm conversion into heat.
In order to more vividly illustrate the effect of spectrum on plant growth, the following three pictures from research papers are cited. Figure 1 shows the relationship between solar spectrum and plant growth, and Figure 2 shows the photosynthesis size of different wavelengths of plants. Impact, Figure 3 shows the effect of non-band light on plant germination, flowering, and fruiting.
Figure 1 Effect of sunlight on photosynthesis of green plants
Figure 2 Effect of visible light on photosynthesis of green plants
Figure 3 Effect of light in different bands on the growth of green plants
From the above three pictures, we can see that the blue light in the visible light band of 400 ~ 520nm and the red light of 610 ~ 720nm have the greatest influence on the growth of plants, and in the blue and red bands, the blue light of 450nm The red light at 660 nm has a significant effect on plants.
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