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As the fourth generation of new lighting sources, Led Horticulture Grow Lights have many characteristics that are different from other electric light sources, which also makes them the first choice for energy-saving and environmentally friendly light sources.
The LEDs used in the field of plant cultivation also exhibit the following characteristics: the wavelength type is rich, which coincides with the spectral range of plant photosynthesis and light morphology; the spectral wave width is half wide and narrow, and can be combined to obtain pure monochromatic light and composite spectrum as required; can be concentrated Light of a specific wavelength irradiates crops in a balanced manner; it can not only adjust the flowering and fruiting of the crop, but also control the plant height and the nutrient composition of the plant; the system has less heat and takes up less space, and can be used in a multi-layer cultivation three-dimensional combination system to achieve low heat load And the production space is miniaturized; in addition, its strong durability also reduces operating costs. Because of these remarkable features, LED is very suitable for plant cultivation in a controlled facility environment, such as plant tissue culture, facility gardening and factory nursery, and aerospace ecological life insurance system.
As of 2013, China's facility horticulture area has developed rapidly, and the light environment control lighting technology for plant growth has attracted attention. Facility horticultural lighting technology is mainly used in two aspects: one, as supplementary lighting for plant photosynthesis when there is little sunshine or short sunshine time; second, as induced lighting for plant photoperiod and light form.
1. Research on LED Plant Grow Light as supplementary lighting for plant photosynthesis.
Traditional artificial light sources generate too much heat. For example, with LED supplementary lighting and hydroponic systems, the air can be recycled, and excessive heat and water can be removed It can be efficiently converted into effective photosynthetic radiation, and finally into plant matter. Studies have shown that with LED lighting, the growth rate and photosynthetic rate of lettuce are increased by more than 20%, and it is feasible to use LED for plant factories. The study found that, compared with fluorescent lamps, mixed-wavelength LED light sources can significantly promote the growth and development of spinach, radishes and lettuce, improve morphological indicators; can maximize the bioaccumulation of sugar beet, the most significant accumulation of betanin in hair roots, and produce in hair roots The highest sugar and starch accumulation. Compared with metal halide lamps, the anatomical morphology of the stems and leaves of pepper and perilla plants grown under the LED with a wavelength changed significantly, and as the optical density increased, the photosynthetic rate of the plants increased. The compound wavelength LED can cause the stomatal number of marigold and sage to increase.
2. The Horticultural LED Lights is used as the induced illumination of the plant photoperiod and light form.
The LED with a specific wavelength can affect the flowering time, quality and duration of the flowering period of the plant. LEDs of certain wavelengths can increase the number of flower buds and flowering of plants; LEDs of certain wavelengths can reduce the flowering response and regulate the pedicel length and flowering period, which is beneficial to the production and marketing of cut flowers. This shows that LED regulation can regulate the flowering and subsequent growth of plants.
The establishment of a controlled ecological life support system (Controlled Ecological Life Support SystemCELSS) is the fundamental way to solve the long-term manned space life support problem. The cultivation of higher plants is an important element of CELSS and one of its key illuminations.
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Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.