Light, an essential energy source for plant growth, Nanjing Agricultural University has recently developed a successful alternative to sunlight - LED (semiconductor light-emitting diode) plant growth lamps, which can be tailored to different plants and different plants. Custom lighting.
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Nannan Agricultural University took the lead in research and development, customized lighting for plants, green and efficient, and broad market prospects.
Dr. Xu Zhigang, a professor at Nannong University, introduced that they have undertaken the “Application Research of Semiconductor Lighting Sources in Plants” in the National “863” High-Tech Research Program. They have already completed the topic and mastered the application principle of LED in plant factory breeding. And key technologies. In other words, with the foundation of industrialization, the application of LED in agriculture and biology will be expected to become a new field for the development of LED industry in Nanjing.
There are many ways to increase the yield of crops. One is biotechnology, such as hybrid rice cultivated by Academician Yuan Longping; the other is chemical methods such as fertilizers, pesticides and hormones. We are exploring Is a physical way, trying to promote the growth of plants through the regulation of light, and gradually reduce the excessive dependence of modern agriculture on chemical technology." Xu Zhigang said.
Light has magical power, and it has a regulating effect on photosynthesis, growth and development, morphogenesis and material metabolism of plants. At present, in greenhouses and greenhouses, the light sources used to make up for the lack of sunlight are generally fluorescent lamps, high-pressure sodium lamps and incandescent lamps. Lights, etc., the spectral energy distribution of these light sources is designed according to the needs of the human eye for light, and the spectrum required for plant growth is different from the needs of the human eye. According to the special research project of Nannong University, LED wavelength type is rich, and there is much room for regulation, which is suitable for plant lighting.
For example, the illumination control required for radish and green vegetables in the cultivation process is not the same. Different LED lights can be configured according to their respective preferences; during the cultivation of sprouts, the content of chlorophyll or carotene and vitamins in the leaves , can be achieved by lighting adjustment.
LED illumination reduces plant cultivation costs Factoryized seedlings are already an important support for modern agriculture, and are the first application areas for LED plant lights developed by Nannong University. In the nursery workshop, the seedlings of various flowers and vegetables are arranged neatly on the shelf, and the upper ends of each shelf are equipped with LED lights, and these seedlings are used for export.
“The traditional light source needs 0.5 kW of light source per square meter, and the LED only needs 0.27 kW, which can reduce the power consumption by about half.” Xu Zhigang said. Power saving is on the one hand, the application of this new type of LED light source can more restore the original appearance of plant growth. Nowadays, the cucumbers and tomatoes grown in the greenhouse are not good in taste, and there is a reason why the illumination is not standardized.
It is understood that there is still much room for extension of the research direction of such LED lamps, which can not only achieve intensive plant production, reduce the use of plant hormones or other chemicals, but also can be used for physical control of agricultural pests, using specific wavelengths. LED light source kills pests; it can also be used for animal breeding. It uses light of specific wavelengths to implement light to promote animal production, reduce disease occurrence, and reduce the use of feed additives and hormones.
Bringing over 100 billion yuan of development space to the LED industry. Only the plant factory breeding industry provides a huge consumer market for LED light sources. According to the calculation of the Nannong University research group, the seedlings can only reach nearly 10 billion plants. Huge amount, the annual domestic consumption is even larger. If LED is used to replace traditional electric light source in plant factory breeding, its one-time total market size will reach 200 billion yuan.
The research project has been completed, and the next step is real industry practice. According to the plan of Nannong University, the urgent task is to equip 1-2 plant-based nursery enterprises with special LED light sources for plant nursery, for promotion demonstration, and then to industrialize LED plant lights.
"Our R&D results have a series of parameters. In the process of LED industrialization, it is only necessary to change the parameters according to different application directions." Xu Zhigang said.
At a small forum held recently, the parties are keenly concerned -
Development of "LED", how to do in Nanjing?
Nanjing LED (Semiconductor Light Emitting Diode) Industry Development Forum was held recently at Nanjing International Expo Center. LED industry experts from home and abroad and representatives of government departments and local enterprises in Nanjing conducted a warm and direct dialogue. The development of this emerging industry is becoming clearer in the perspective of the parties.
"Nanjing LED industry achieved sales plan of more than 15 billion yuan by 2012, divided into four major product groups of LCD backlight, lighting, devices and display screens, of which LED lighting sales plan is 2 billion yuan." When it came out, the "temperature" in the 209 conference room of the Expo Center suddenly increased.
Sitting in the second row of Nanjing Henderson representatives stood up and said that this year can be regarded as the first year of LED industry development, it is expected that there will be explosive development in the market, only the streetlights in LED lighting, the market is huge, Nanjing The output value of enterprises in lighting should be far more than 2 billion yuan.
The voice here has not fallen. The representative of the CLP Panda took over and agreed. The lighting business of CLP Panda integrates the lighting of the original Huadian and Sanle, and has a series of plans for development in the LED field.
The head of Philips Asia Pacific believes that technology leadership is important, and practical application innovation can also win the market. Philips' LED lights are very popular abroad, and the core components are also the products of the international leading companies in procurement, but they are actually applied. A lot of patents provide consumers with the most practical products.
Compared with the enthusiasm of the company, Chen Hao, a professor from Tsinghua University, is obviously calm. He said that the scientific research industry in the Yangtze River Delta has outstanding advantages, but as an emerging industry, many cities across the country are making efforts to promote the LED industry. The technology of LED is too fast. The planning of Nanjing should be forward-looking and the investment should be more decisive. Learn from the overcapacity of the domestic PV industry due to the rush of overcapacity.
