STEM与日常科技·英语30篇（1）
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Vertical Farming and LED Light Spectra for Plant Growth
垂直农业与LED光谱对植物生长的影响
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Vertical farms grow crops in stacked layers inside buildings using artificial light.
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Unlike sunlight, LED lights emit specific wavelengths that plants absorb most efficiently.
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Red and blue light wavelengths drive photosynthesis more effectively than green light does.
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Farmers adjust LED spectra to match each crop’s growth stage and nutritional needs.
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This precise lighting reduces energy waste and increases harvest frequency per square meter.
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Since no soil or pesticides are needed, vertical farms use far less water than field farms.
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However, high electricity costs remain a major challenge for large-scale profitability.
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Researchers are now designing smarter LEDs that dim or shift spectra automatically during the day.
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Some systems even link light patterns to plant stress sensors for real-time optimization.
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Despite limitations, vertical farming helps cities grow fresh food with smaller land footprints.