Ultrafine nano-bubble hydroponic lettuce shows a significant yield increase.
2026-06-15
To investigate the growth-promoting effects of ultramicronanobubbles in conjunction with light exposure on hydroponically grown lettuce, this experiment established three photoperiods—10, 12, and 14 hours per day—and compared the cultivation outcomes of conventional nutrient solution with those of a nanobubble‑enriched nutrient solution.
(On the left of each figure is the conventional group, and on the right is the nanobubble group.)
After 24 days of treatment, it was found that nano‑bubble irrigation significantly increased yields across all light regimes: yields improved by 13.81%, 17.48%, and 20.84%, respectively, with a clear positive correlation between longer photoperiods and greater yield gains. Further comparison of root morphology revealed that the ultrafine nano‑bubble treatment group exhibited markedly superior root density and length compared to the control, with roots that were white, vigorous, and metabolically active. This robust root system substantially enhanced the uptake efficiency of water and nutrients from the nutrient solution, thereby strongly supporting vigorous shoot growth and cumulative yield accumulation. This complete growth‑promoting cascade—from “strong roots” to “lush foliage”—demonstrates the promising potential of micro‑ and nano‑bubble oxygenation in high‑efficiency hydroponic production.
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