What Are LED Grow Lights?

LED plant growth light is an artificial light source that uses LED (light-emitting diode) as a luminous body and satisfies the lighting conditions required by plants for photosynthesis. Divided by type, belongs to the third-generation plant fill light!

led plant growth light

Light environment is one of the important physical environmental factors indispensable for plant growth and development. Controlling plant morphology through light quality regulation is an important technology in the field of facility cultivation; plant growth lamps have more environmental protection and energy saving functions. Provide photosynthesis, promote plant growth, shorten the time for flowering and fruiting, and increase production! In modernization, it is an indispensable product of crops.

Rich wavelength types, which exactly match the spectral range established by plant photo-synthesis and light morphology; the spectral wave width is narrow at half width, and can be combined to obtain pure monochromatic light and composite spectrum according to needs; it can concentrate light of specific wavelengths to illuminate crops in a balanced manner; The crops bloom and bear fruit, and they can control plant height and plant nutrition. The system has less heat and takes up less space. It can be used in a multi-layer cultivation three-dimensional combination system, which achieves low heat load and miniaturization of production space.

The characteristics of led plant lights: rich wavelength types, which exactly match the spectral range built by plant light synthesis and light morphology; the spectral wave width is narrow at half width, and can be combined to obtain pure monochromatic light and composite spectrum according to needs; it can concentrate light of specific wavelengths to be evenly illuminated Crops; not only can adjust crop flowering and fruiting, but also control plant height and plant nutrition; the system has less heat and takes up less space, and can be used in a multi-layer cultivation three-dimensional combination system, which achieves low heat load and miniaturization of production space.

Organic planting is a method that does not use chemically synthesized fertilizers, pesticides, and growth regulators, nor does it use genetic engineering and ionizing radiation technology. Instead, it follows the laws of nature and uses agricultural, physical, and biological methods to fertilize the soil. 2. Agricultural production system for controlling pests and diseases to obtain safe organisms and their products.

In fact, organic cultivation does not require fertilizers at all, but organic fertilizers can be used: farmhouse fertilizers, mineral fertilizers, biological bacterial fertilizers, etc., which are harmlessly treated by high-temperature fermentation. Due to the limitation of this kind of fertilization, the growth cycle of plants must be affected, and the large demand in the current market seems to be in short supply. Therefore, shortening the production cycle is one of the methods.

LED plant lights help shorten the growth cycle of plants, because the light source of this lamp is mainly composed of red and blue light sources, using the most sensitive light bands of plants. 450-460nm and 460-470nm.

In the past decade, China's facility horticulture area has developed rapidly, and the light environment control lighting technology for plant growth has attracted attention. Facility horticulture lighting technology is mainly used in two aspects:

1. When there is little sunshine or short sunshine time, it can be used as supplementary lighting for plant photosynthesis;

Second, it is used as the induced lighting of plant photoperiod and light form.

1. Research on LED as supplementary lighting for plant photosynthesis Traditional artificial light sources generate too much heat, such as the use of LED supplementary lighting and

With chrysanthemum as the test material, 120 branches of chrysanthemum stems with consistent growth and robustness were selected and divided into 2 groups of 60 branches each. Cut about 12cm long leafy branches and cut the base into a wedge-shaped surface. Treat the base with 10PPM of naphthalene acid for 12 hours, and then propagate the smart seedbed that grows in natural light and the red light seedbed that is supplemented by plant growth lights. , Observe and record the growth of stem segments. Extraction method for determination of chlorophyll content. On the 3rd, 6th, and 12th days of culture, 0.2g of leaves of the same parts of each treatment were evenly taken, cut, and soaked in 1: 1 acetone: absolute ethanol, and placed in a 40-degree incubator. After 24 hours of extraction, the OD value at a wavelength of 652 nm was measured, and the chlorophyll content was calculated. Soluble sugar was determined by 3,5 dinitrosalicylic acid method, and nitrate reductase (NR) activity was determined by sulfa colorimetry. The following results were obtained:

1. After 30 days of cultivation, the stem segments under red light took root earlier than under natural light. The final number of roots was more than 100%, and the roots were many and strong. The leaves are thick green, the stems are thick, and the seedlings are vigorous. The growth of the material under red light was significantly better than that under natural light during the entire cultivation process, showing that red light has the effect of promoting the rooting of Thousands Chrysanthemum (Table 1).

Recently, the Ministry of Science and Technology organized a report on the scientific and technological achievements of the Eleventh Five-Year Plan National 863 Program for Major Semiconductor Lighting Projects in the Shenzhen Convention and Exhibition Center, fully displaying the achievements and scientific and technological innovation achievements of the 11th Five-Year Plan 863 Program major semiconductor lighting projects. Cao Jianlin, Deputy Minister of Science and Technology, visited the exhibition in person.

At the invitation of the Ministry of Science and Technology, the 863 project "Research on the Application of Semiconductor Lighting Sources in Plant Tissue Culture" undertaken by the Agricultural College of Nanjing Agricultural University attended the exhibition. A series of research results such as "LED plant tissue culture lamp", "LED plant lamp", "LED intelligent biological incubator" and "LED plant cultivation intelligent light control system" exhibited by Nanjing Agricultural University have attracted widespread attention from the industry.

In the national "Eleventh Five-Year Plan" 863 high-tech research plan, the Ministry of Science and Technology innovatively started the research process of LED application in the agricultural field. After a competitive defense, Nanjing Agricultural University successfully won the 863 project establishment and funding. During the "Five" period, it was the only agricultural lighting project that received national approval. Based on more than 5 years of accumulation of achievements and the characteristics of the tissue culture room, the project team has developed the LED tissue culture lamp by optimizing the spectral energy parameters, manufacturing process and shape design, which are characterized by high efficiency, energy saving, long life and convenient installation. Compared with fluorescent lamps, the use of LED tissue culture lamps can enhance the quality of seedlings, increase the rate of high-quality seedlings, shorten the period of nursery seedlings and reduce energy consumption costs; increase the lifespan by 10 times; save 69.7% of electricity; Later investment; during the life cycle, a total of 176,764 yuan can be saved; the height of the tissue culture rack is reduced by 35%, which improves operational comfort and work efficiency; and the space utilization rate is increased by 35%.