Wide application of LED in agriculture
LED has many characteristics that are different from other electric light sources, which also makes it the first choice for energy-saving and environmentally friendly light sources. In the past 10 years, the area of facility horticulture in China has developed rapidly, and the environmental control technology of plant growth has attracted attention. Facility horticulture light irradiation technology is mainly used in two aspects: as supplementary irradiation for plant photosynthesis when the amount of sunshine is low or the sunshine time is short; as irradiation for plant photoperiod and light morphology. LED has significant advantages in both aspects.
LED bulb design In recent years, with the continuous development of agricultural production technology and the increasing demand for increasing plant yield and shortening the planting cycle, artificial light sources are increasingly used in the field of plant growth, such as vegetables , Melons, fruits, flowers, nurseries, etc.
LED can also be used in the aerospace ecological life support system. Establishing a controlled ecological life support system is the fundamental way to solve the problem of long-term manned space life support. One of the key technologies is light. Compared with other light sources such as cool white fluorescent lamps, high-pressure sodium lamps and metal halide lamps, LEDs are more effective in converting light energy into photosynthetically effective radiation; in addition, it has the characteristics of long life, small size, light weight and solid state. Therefore, in recent years, LEDs have received much attention in ground and space plant cultivation.
In traditional agricultural production, ordinary electric light sources are generally used to supplement light and cover white light sources with colored plastic films to change the environment to regulate the growth and development of plants in facility cultivation. However, these measures have problems of varying degrees, such as lack of analysis of specific spectral components, resulting in impure light quality processing, inconsistent light intensity, close to or even lower than the light compensation point of plants, and low energy efficiency of the illumination light source. LEDs can solve these problems and are particularly suitable for artificial light-controlled plant cultivation.
2 international large plants for cutting into plants
LED lighting proves that the market is mature
In the 2011 Taipei Optoelectronics Show, in addition to general lighting applications, plant lighting attracted the most attention. Following the establishment of the plant factory by Philips, a major international manufacturer, Osram has also invested in led plant lighting. China’s 12th Five-Year Plan lists plant factories as a key project. Japan will also set up 100 plant factories after the earthquake, as LEDs. Of course, the Taiwanese factory in the second largest producer also hopes to seize the opportunity in this vast market. Simon Technology, Technology and Hongkai Industry have also invested resources in this exhibition, exhibiting its proud.
Different wavebands have different effects on plant growth. If you want to increase plant photosynthesis, you can increase the proportion of blue light, while promoting seed germination or regulating flowering can be controlled by blending; the growth of plant stems can be irradiated with ultraviolet light. Because LED light is different from sunlight and traditional full spectrum, it belongs to a single spectrum. Therefore, the use of LEDs has an absolute advantage in the special purpose of plant lighting, attracting investment from major domestic and foreign manufacturers.
Take the large manufacturer Osram as an example. In 2011, the light source designed for LED plant lighting was exhibited for the first time at the Taipei Optoelectronics Show. The design was designed with a wavelength of 656nm plus 455nm blue light and 6500K white light. As a world LED and agriculture, Osram I thought it would exhibit its latest products in plant lighting at the first stop, hoping to grab the Asian LED plant lighting pie.
Hongkai Industrial is exhibiting a 50W LED plant growth light composed of 32 high-power (650~670nm) and 4 high-power blue light (450~460nm). The net weight is about 3 kg and can reach IP66 level. It can be applied. It is used in hydroponic agriculture, gardening design, greenhouse lighting and home-style sunless cultivation, etc.
Technology not only exhibited 35W and 70W plant photos, but also made LED plant lighting into a G19 bulb type, hoping to grab the general household market. This product is currently exported to Japan, creating a dazzling result.
In addition to the LED plant growth lamp module, Symantec and Chung Hsing University have long-term cooperation in research to establish Zhuwang Agricultural Demonstration Farm, and repeated experiments on lettuce and cantaloupe. As a result, the harvest weight of lettuce with LED supplementary light is significantly higher than that without supplementary light. More than doubled, proof
LED lights have a significant impact on the growth of plants. Put forward the concept of plant factory output from the whole plant.
Including (1) LED plant light planning and design, (2) supplementary light greenhouse planning and construction, (3) three-dimensional combined planting bed, (4) nutrient solution circulation system, (5) temperature and environmental control system, (6) Container plant factory, (7) energy-saving system application integration and (8) agricultural technology and material services. Symantec has been working on LED lighting for a long time, and has promoted LED plant lighting from a single product to the concept of the entire ecosystem, with outstanding results.
