Used In The Study Of Plant Growth Light Led Lighting System

IN recent years, along with the development of the red light, the blue light and the far infrared high-power monochromatic LED technology, the application of LED in agriculture is causing extensive concern of the various research institutions and enterprises. LED not only has many advantages, including of small volume, high luminous efficiency, long life, narrow wavelength range and cold light source, but also can irradiate the plant with a specific wavelength according to the plant needs. LED is targeted and can make the supplementary lighting environment adjustable. Compared with the traditional artificial light, LED has many obvious advantages. At the same time as more and more manufactures involved in the market of the high-power LED, the price barriers is gradually disappearing. So the application of LED in agriculture is promising.According to the present situation of research about LED lighting system for supplementary lighting on plants was in a backward state in china, Using the modular design concept, combined a driving power with light modulation function, we designed a LED lighting module for supplementary lighting on plant, and a LED lighting system based on the modules. Then this LED lighting system was used to achieve the test of the Arabidopsis seed germination under different rate of R/B. In order to seek the utility of this LED lighting system on the area of supplementary lighting on plants, enhance the quality of plant products and reduce the cost of manufacture and working, and sequentially the parameters could be used as scientific foundation for the development of artificial light source of energy saving, environmental protective and high efficient in the field of supplementary lighting on plants.1. Through the analysis of Photosynthesis absorption spectrum, we use the two peak wavelength (660nm and450nm) of the chlorophyll a and chlorophyll b absorption spectrum as the peak wavelength of the red module and the blue module. In addition we use infrared module with peak wavelength of735nm. A separate module mainly includes1W monochrome LED, PCB board, a radiator, an optical lens, a driving power supply, light controller and timer and other parts.2. Based on the spectrum analysis, the test of Optical parameters and the illumination test of the LED lighting system and fluorescent, we can see the LED lighting system is more efficient and can be achieved with the plant chlorophyll absorption spectrum peak perfectly. At the same time the light effect of the LED lighting system is significantly higher than it of the fluorescent lamp. In the field of energy saving, the performance of the LED lighting system is more excellent.3、According to the test of the Arabidopsis seed germination, this LED lighting system can be used for supplementary lighting. We can see the final germination of the LED lighting system and the fluorescent is almost the same. The effect of infrared light effects light-induced regulation during the process of seed germination, and delayed the germination time. More LED red modules on Seed Germination of Arabidopsis has certain simulative effect.