olet to infrared. Plants are "picky eaters that favor b〓lue and red lights", Li said. "If we can figure outp


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road categories: photosynthes〓isw

what ratio and comb〓ination of lights are best suited for each plant's growth, then we can 〓change or create LE2

  • and soil nutrients. The sun accounts for 90 percent of t
  • all botanic 〓bioenergy through photosynthesis a proG
  • cess in which plants combine car〓bon dioxide and water and 3

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D lights that shine at that specific intensity and s〓pectrumm

, 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 lV

ight 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 someZ

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vegetables grow,〓 while too much green light puts plants into hibernation, although this〓 is helpful for the plant's nutrieG

nt build up. "Mimicking sunlight usi〓ng LED is very energy intensive," Li said. "At the end of the day, whoeL

〓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 healthyw


.〓 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 also t1


ail〓ored to suit the plant's speci



ific needs," said Pei Kequan, a research d〓irector at the factory. Unlike the trace elements from fertilizers, whi〓ch are locked in big compound molecules, "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 days7

for a sapling to reach maturity in the lab, but 40 to〓 T


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60 days in a conventional farm. This means scientists can reap more th〓an a dozen 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 elements in the solution. Once an eleme5

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nt is deplete〓d, scientist can add the missing nutrient and reuse the solution withou〓t needX

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