According to the data, the number of sunshine days in some areas in the northern hemisphere in 2011 was lower than in previous years. In Taiwan, for example, the number of recent sunshine hours was the lowest in 61 years. Under this circumstance, the United States, Europe and Japan, and mainland China have increased demand for plants that can supplement the lack of sunshine. Especially in Japan after the 311 earthquake in 2011, subsidies and attention to plant factories and plant lighting are even more important. in the past.
Extreme weather and global sunshine reduction push up plant plant demand
At this stage, the global climate change is fierce, and the frequency of extreme weather is more frequent than that of modern times. From 2011 to 2012, the northern hemisphere winter is extremely cold, and in 2011, the coverage of clouds and the intensity of rainfall, the reduction of sunshine time is a Unfavorable factors, plant lighting and plant factories have become another way of making up for discussions in the academic and academic circles.
Since 2011, the Japanese central government and the local government (prefectural government) have been assisting local agricultural associations and operators to develop plant factories, and to strengthen the shortage of sunshine and affected cultivated land through LED lighting. Ploughing and other ways to make up.
The Japanese government has proposed a subsidy policy for plant factories since 2009, totaling 14.6 billion yen (about 9.6 billion yuan for agriculture, forestry and fisheries provinces; about 5 billion yuan for the Ministry of Economy, Trade and Industry) for plant plant subsidies, and an additional 1.04 billion yen for 2010. Development of technology with high added value for fully artificial plant plants. Thanks to the implementation of the subsidy policy, the number of plant factories has gradually increased from 50 in 2009 to over 100 specifications, including artificial light source and solar light source plant factories.
The main reason why plant factories are popular in Japan
1. The cost of agricultural land is high.
2. Summer high temperature, high light, cheap environment control.
3. Resources and related equipment are relatively easy to obtain, which is also the main cause of the development of plant factories.
4. Hydroponic cultivation in the greenhouse The leafy vegetables have a certain market in Japan. The cultivation of vegetables in the plant factory can be fully accepted by consumers.
5. Consumers are in high demand for high-quality vegetables and are willing to pay a high price.
6. The performance of related power-consuming equipment has improved, especially the performance of light source and air-conditioning equipment has been greatly improved.
7. The Japanese government vigorously promotes and promotes a high proportion (50%) of subsidies, and the recipients are not divided into enterprises or farmers.
Plant lighting is not limited to LED light sources, and fluorescent light sources also have a certain status.
However, plant lighting is not the only use of LED light sources. The earliest and planned lighting source for plants to supply at specific wavelengths is to use fluorescent lamps, and has been developed for a period of time, and more energy efficient, LED lighting with specified wavelengths. Taking into account the advantages of combining applications with multiple wavelengths, it has become the new favorite of plant illumination sources. At the same time, the life of the light source is longer, the number of replacements is less than that of the fluorescent tube, and the power saving effect for long-term use is also obvious.
Japan's existing plant factories are from Hokkaido, Aomori, Iwate, Miyagi, Yamagata, and Fukushima in the Tohoku region, as well as in the Kanto region. Plant plants and plants range from vegetables and flowers to cash crops.
Current status of LED light source manufacturers in various plant factories
3ELED can use 8 red light * 8 green light * 8 blue light to control the wavelength. For the wavelength of strawberry growth, some methods use a simple use of 8 red light * 0 green light * 0 blue light, but there are other ways. Because the strawberry planted by the 3ELED plant growth lamp is quite beautiful and huge, it won the first reward of the Tokyo International Raspberry Expo.
The white light LED (blue LED plus red and green fluorescent powder) is used for interpretation. The color rendering can be as high as 85, and the color temperature can be elastic between 2800K and 7000K. Interpretation believes that white LEDs can be closer to real sunlight colors to meet plant growth needs. At present, Taiwan's wild vegetable workshop and Da Ye University have adopted the plant growth lamp, and the affiliated institutions of the China Agricultural Science and Technology Association also adopted the plant growth lamp in 2012. At present, in the development of the Japanese market, Intern and Hitachi Hi-Technologies strategic alliance to enhance brand awareness.
EverLight uses RGBLED to develop the light source for LED plant lighting. Benefiting from the unusual climate changes in China and the United States, Everlight has received orders from the China Agricultural Science Association, a US herbal research institute, and European agricultural implements. In 2011, Yiguang has reached an agreement with Philips to develop a plant factory. I believe that in the future, plant factories will have better system matching solutions when using LED light sources.
German manufacturer Osram showed 20 656nm red LEDs, 12 455nm blue LEDs, 12 6500K white LEDs, and 12 green LEDs.
Delta Electronics also launched LED lighting products for plants and is optimistic about the future development of the market. Agricultural lighting planning, plant factories, and trying to grow crops with high economic value are also new trends in some of the current projects on the market.
Japanese manufacturer Showa Denko proposed the light source requirements for plant lighting, including high luminous efficiency. PPFD should be higher than 130-150μmol/(m^2*s), and it can provide stable PPFD. The distance of the light source must be kept at a moderate distance. According to Showa Denko, the efficiency of the center wavelength of 660nm is the strongest. They are actively developing the most suitable cultivation methods, and the future results are worth looking forward to.
At present, artificial light source type plant factories mainly use fluorescent lamps, but due to the lack of red light, LED light sources can relatively compensate for their shortcomings. It is believed that LED penetration will continue to increase under the LED price drop and power saving incentives. In 2011, the LED light source inquiries and shipments for plant lighting have grown in real terms. In 2012, orders for plant lighting sources were also increasing.
At present, we know that in addition to Taiwan, Japan and European and American manufacturers, Chinese LED manufacturers are also actively developing plant lighting. After all, plant factories are not used in China for a long time, and there is no station in the market for traditional plant lighting. When the foothold is stable, LED plant lighting has entered the market with great strength, and China is the world's agricultural power and the world's LED industry.
The market capacity of LED plant lighting in China will increase significantly in the next three years. However, as far as the current situation is concerned, the technical problems of the two types of commonly used monochromatic light for Chinese manufacturers are mainly reflected in the fact that the requirements for light of each plant are different, which makes many small companies unable to cope with the adjustment according to plants. The wavelength of light, knowledge and precision in this area, as well as theoretical analysis, practice and reliable long-term test data are all ignored. Many LED plant lighting companies do not know the wavelength of light required by specific plants, so it seems that Chinese native plants use LED lighting to have a learning path to go.
As the Japanese market is progressing in plant lighting, technology is leading, and the enthusiasm is also large, Japan has already predicted that in 2020, the market value of LED lighting for plants can reach 300 billion yen a year (the market size of LED components) About 40 billion yuan a year), the overall value of plant cultivation is 3 trillion yen, and the growth potential cannot be underestimated.