Japanese plant factories are moving towards commercialization and are being promoted globally.

Comprehensive report on the through train for agriculture, rural areas and farmers: vegetables grow up "without seeing the sun", but they are watery and healthy. This is not a hypothesis, but a new type of agricultural production, a boon for large cities or areas with little arable land. As of February this year, the number of Japanese plant factories has risen to 168, an annual growth rate of about 20%. Japan's future (mirai) is promoting plant factories around the world as a new type of agricultural production.

The demand for food is expanding, but urban arable land is shrinking. How to solve this problem? Japan, a country with very limited land area, has given a solution-plant factories. This plant factory can be built in the suburbs or in idle factories. On the layered cultivation shelves, the vegetables grow "out of sight", but they are watery and healthy. This is not imagination or hypothesis, but a new agricultural production method that Japan's future (mirai) has commercialized and is being promoted globally.

nutritious led lamp

plants must carry out photosynthesis to be able to grow, so in the totally enclosed plant factory, how can plants obtain the energy for growth? the answer is, led lights. Plant factories completely replace natural light with led lights and fluorescent lamps, provide vegetables with the nutritional light they need, and strictly control the environment required for plant growth such as temperature, humidity, light, carbon dioxide, and nutrients.

Light is the heart of the plant factory. In the past, most similar plant factories used metal lamps and energy-saving lamps as light sources, but due to the large power consumption, they could only be used as a means of light supplement, not as main lighting. The led lamp is a very ideal substitute: the chip of the led lamp emits light, which can adjust the nutritional light more targeted to plants, and can realize the artificial adjustment of brightness, light quality and light rhythm; In addition, it also has the advantages of pure light quality, high light efficiency, low heat generation, energy saving and environmental protection.

Solar radiation can't exactly match plant needs, but artificial light can. According to the above research results, the lighting on the cultivation shelf of the plant factory is divided into three areas: white, red and white, and the general lighting technology is adopted, which can not only evenly disperse the high directional led light, but also irradiate the light with different wavelengths according to the growth stage of the plant. For example, in the initial stage of vegetable sowing to seedling, white and red led light sources will be irradiated to promote photosynthesis. Then, the red light emitted by the red and blue LED light source is irradiated to promote the growth of leaves and rhizomes. Near the harvest period, will be irradiated with white light again to promote photosynthesis. After using this method, compared with the use of only fluorescent lamps, not only the power consumption is reduced by 40%, but also the harvest of the same area is increased by 50%.

Since the cultivation racks in the plant factory are stacked, the interval between the cultivation racks is about 35cm, and the total height can vary from 6 to 15 layers (depending on the actual environment, it can be adjusted), occupying less land and shortening the growth cycle by about half. At present, a total of 40 to 50 kinds of vegetables can be cultivated in plant factories, with lettuce and vanilla leafy vegetables in the majority. The future president of the company, Shimamura Maozhi, told the reporter of "21st Century Business Review" (hereinafter referred to as "21cbr") that the reason for choosing lettuce is its strong vitality, suitable production cycle and plant height. "The traditional production cycle of lettuce is about 70 days, while in plant factories, the production cycle only takes 33-35 days."

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