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tion of lights are best suited for each plant's growth, then we can 〓change or create LED lights that shine at that specific intensity and s〓pectrum, saving lots of energy in the process," he added. While blue a〓nd red lights are the "meat and potatoes" of a plant's growth, scientis〓ts notice other spectrums of light also play a subtle role in maximizin〓g growth and quality. For example, scientists discovered that adding s〓ome green light to the red-blue recipe could help some vegetables grow,〓 while too much green light puts plants inZ

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to hibernation, although this〓 is helpful for the plant's nutrient build up. "Mimicking sunlight usi〓ng LED is very energy intensive," Li said. "At the end of the day, whoe〓ver has the most energy-efficient and productive light recipe wins." W〓hile plant growth mostly relies on light, water and carbon dioxide, it 〓still needs some trace elements from soil or fertilizers to be healthy.〓 In the case of plant factories, hydroponic nutrient solutions infused 〓with 17 essential elements ranging from nitrogen to calcium have replac〓ed the tilted soil. "The content of the nutrient solution is alsw

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o tail〓ored to suit the plant's specific needsR

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," said Pei Kequan, a research d〓irector at thk

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e factory. Unlike the trace elements from fertiJ

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lizers, whi〓ch are locked in big compound mole5

cules, "the nutrients in the solution〓 are broken into small molecules, meaning the plant can absorb them eas〓ier and grow faster while keeping its nutrient value and taste". It ta〓kes about 20 days for a sapling to reach maturityy

in the lab, but 40 to〓 60 days in a conventional farm. This means scientists can reap more th〓an a dozen 4

harvests of produce each year, compared with one to two harv〓ests from a conventional farms, depending on the weather conditions, he〓 said. Moreover, scientists at the facility have built the infrastruct〓ure to monitor the U

elements in the solution. Once an element is deplete〓d, scientist can add the missing nutrient and reuse theb

Missed This Year

solution withou〓t needing to make a new batch, thus reducing the cost. "We go to great〓 length to study and cater to our plant's most fundamental needs, makin〓g sure they could grow under the best conditions," Pei said. "In a way,〓 the plants are the o

kings, and we are all its servants." It's high tim〓e we find a sustainable and green way to protect our food security."BEIJING, Feb. 13 (Xinhua) -- China will tighten regulationY

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