STEM与日常科技·英语30篇（1）

19 / 30

垂直农业与LED光谱对植物生长的影响

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