1. Color Temperature and Luminance of LED Beads for Plant Supplementary Light
The color temperature and fluidity of plant LED beads can be seen from human eyes, while the photosynthesis of plant to light does not see the color temperature and fluidity. It's more about the spectral components.
2. Effects of Spectral Range on Plant Physiology
280-315 nm-> has little effect on morphology and physiological process.
315-400 nm - > less chlorophyll absorption, affecting photoperiod effect and preventing stem elongation
400-520 nm (blue) - > chlorophyll and carotenoid absorption ratio is the largest, which has the greatest impact on photosynthesis.
520 ~ 610 nm (green) - > Pigment absorption rate is not high
610-720 nm (red) - > chlorophyll absorption rate is low, which has a significant effect on Photosynthesis and photoperiodic effect.
720 - 1000 nm - > low absorption rate, stimulating cell prolongation, affecting flowering and seed germination
> 1000 nm - > converted into heat
From the above data, the effects of different wavelengths of light on plant photosynthesis are different. The light needed for plant photosynthesis is about 400 - 720 nm. Light from 400 to 520 nm (blue) and 610 to 720 nm (red) contributed most to photosynthesis. The absorption rate of 520 - 610 nm (green) light by plant pigments is very low.
The research foundation of light is spectrum. The application quality of light needs spectrum analysis. The spectrum of LED plant lamp is particularly important. The design ability of the manufacturer to plant lamp spectrum determines its competitive position in the market. The LED plant lamp spectrum needs to be specially designed according to the planting process and can not be imitated.
Plant factory is a cross-border product. Haoliang Institute of Solid Light Source divides plant factory technology into planting equipment technology and planting technology. Plant light spectrum technology is an important link between planting equipment and planting technology. It needs to be clear that planting technology determines spectral design, and the design and manufacture of plant lamp is a guarantee. The light quality required by plant technology can achieve the best efficiency. These characteristics of plant lamp determine the complexity and diversity of plant spectral design.
The spectrum of the LED plant lamp is discussed as a key point because the spectrum of the LED light source can be designed according to the requirements of planting technology. At the same time, the spectrum of the LED light source can be controlled by adjusting the light technology. At present, the LED light source is the only plant light source that can realize the variable spectrum and the technology of the variable spectrum of the plant lamp. Mainly for the control of light form, it has little effect on energy saving. Ordinary plant lamp can also save energy by adjusting the light period. The application cost of variable spectrum will increase a lot.
