Using LED lights instead of sunlight, vegetables are mad and long-mature

“It is the most economical way to use the peak wavelength of photosynthesis for supplemental illumination.” Li Yizhi, manager of the comprehensive evaluation department of Shanghai Semiconductor Lighting Engineering Technology Research Center, introduced the spectrum of light required for different growth stages of different types of vegetables and vegetables. There are differences, this requires technicians to dim in time. Take lettuce as an example. When lettuce is just planted, it can't grow too high. At this time, blue light is more than red light. On the contrary, in the later stage of lettuce growth, it is necessary to have more red when it grows leaves. Light, less blue light. At present, researchers have already figured out the dimming laws of some green leafy vegetables that Chinese people often eat, such as lettuce, celery, and chicken. At the same time, researchers are also experimenting with LED lights to promote the growth of valuable plants such as ginseng and Dendrobium.

According to Li Yuzhi, where the LED lamp is installed in the vegetable is also a matter of learning. The side light is suitable for some vegetables that need to grow in three dimensions, such as cucumber; the top light is suitable for some vegetables that grow "flat", such as eggplant and lettuce, while the bottom light is suitable for vegetables that need to be inverted, compared to the long tomato The long tomato is more advantageous in nutrient transmission, and the growth of the plant is better. Under the action of the bottom light, the small tomato can grow naturally.

Li said that the current joint laboratory of semiconductor lighting modern agricultural applications is still testing a kind of LED lamp "family farm" equipment, and the cost of lettuce is about 10 yuan per 500 grams, which is expected to be extended to families in Shanghai.