1. Plant lighting spectrum and devices
The spectrum of plant lighting is complex and diverse. Different plants have different growth cycles and even different growth environments, and the required spectrum is quite different.
In order to meet these differentiated needs, there are currently the following solutions in the industry:
①A variety of monochromatic light combination schemes, with the most effective peaks for plant photosynthesis at 450nm and 660nm and the 730nm band for plant flowering induction. In the ultraviolet band, these spectrums are combined to form the most suitable spectrum according to the different needs of plants.
②Full-spectrum plant growth lamp scheme to achieve full coverage of plant demand spectrum.
③Mainly full spectrum white light, plus 660nm red light combination scheme, to improve the effectiveness of the spectrum. This scheme is more economical and practical.
2. Fields of plant lighting applications
From the field of application, plant lighting lamps are mainly used in greenhouse lighting, all artificial light plant factories, plant tissue culture, field lighting, household vegetable and flower planting, and laboratory research.
The LED plant growth light lighting system does not provide specific and effective instructions and data support, which delays its application in daylight and multi-span greenhouses.
At present, it is still dominated by small-scale demonstration applications. Since LED is a cold light source, it can be relatively close to the plant canopy, resulting in less temperature impact. In sunlight and multi-span greenhouses, LED plant lighting is mostly used for inter-plant fill light lamps.
② Daejeon application. The penetration and application of plant lighting in facility agriculture is relatively slow, while the application of LED plant growth lights for outdoor long-day crops with high economic value (such as dragon fruit) has achieved rapid development.
③ Plant factory. At present, the fastest and most widely used plant lighting system is the all-artificial light plant factory, which is divided into centralized multi-layer and distributed mobile plant factories according to categories.
④ Household plant cultivation. LED can be used in household plant table lamps, household plant planting racks, household vegetable growing machines, etc.
⑤ Cultivation of medicinal plants. Cultivation of medicinal plants such as clematis, dendrobium, etc., the products in these markets have higher economic value and are currently an industry with more plant lighting applications.
In addition, the legalization of cannabis cultivation in North America and parts of Europe has promoted the application of LED grow lights for herbs in the field of cannabis cultivation.
⑥ Flowering lights. As a necessary tool for adjusting the flowering time of flowers in the flower and horticultural industry, the earliest applied flowering lamps were incandescent lamps, followed by energy-saving fluorescent lamps. With the progress of LED industrialization, more LED-type flowering lamps have gradually replaced traditional lamps.
⑦ plant tissue culture. Traditional tissue culture light sources are mainly white fluorescent lamps, which have low luminous efficiency and high calorific value.
LEDs are more suitable for plant tissue culture with high efficiency, controllability and compact space due to their remarkable features such as low power consumption, low heat generation, and long life. At present, white LED lamps are gradually replacing white fluorescent lamps.
LED plant lighting has good waterproof performance due to its adjustable spectrum and light quantity, low overall heat generation, and is suitable for plant lighting in various scenarios.
Industrial LED grow lights sources for plant lighting will further develop with the gradual specialization of the industry and move in a more targeted direction.
The improvement of light efficiency and energy efficiency is the key to greatly reduce the operating cost of plant lighting. The use of LED plant growth lights to replace traditional lamps and dynamic optimization and adjustment of the light environment according to the light formula requirements of plants from seedling stage to harvest period is inevitable in the future of refined agriculture. trend.
In terms of improving yield, according to the developmental characteristics of plants, cultivation can be carried out in stages and regions combined with light recipes to improve production efficiency and yield at each stage.
In terms of improving quality, the content of nutrients and other health-care functional components can be increased by means of nutritional regulation and light regulation.
Plant lighting has a strong demand for real-time control of light quality and light quantity. With the improvement of intelligent control technology and the application of the Internet of Things, LED grow lights for herbs are bound to become the main trend of future development of plant lighting technology.