CCTV News:With the continuous development of modern facility agriculture, an efficient planting method "plant factory" has come, which does not need soil and sunlight.
Before entering this plant factory in Beijing, the staff have to put on clean work clothes and go through the air shower room for disinfection. These processes are all to ensure that vegetables are protected from pests and diseases and can grow in a clean environment.
Here, the roots of vegetables are not soil, but only water. There are not only various nutrients specially prepared in the water, but also good dissolved oxygen, and the water temperature can be adjusted according to the growth of plants, which not only provides the best growth conditions for vegetables, but also saves the water consumption needed for their growth.
In Henan, a 50-acre carbon-rich vegetable factory, there are nearly 17,000 tomatoes, and a new ear will ripen every seven days. Different from ordinary field tomatoes, these tomatoes do not need any soil to grow, and the carbon dioxide emitted by thermal power plants is its "three meals a day".
In Pinghu, Zhejiang, a fully automatic plant factory, LED lights are equipped here to simulate all kinds of spectra needed by plants, and specific spectra are turned on for special crops, so that vegetables can achieve an optimal growth state to ensure yield and quality.
The magic of the plant factory is that it presses the "fast forward button" for crop growth. Because the environment is closed and controllable, it is less affected by the natural environment and can be planted continuously in a year. The annual output of vegetables in such a football field can reach 300 tons, which is dozens of times more than the output of traditional vegetable fields in the same area.