Executive Summary
In 2024, researchers from the agtech department of a major Spanish university conducted an independent study evaluating the impact of oxygen nanobubbles on blueberry production in a soilless cultivation system. The study demonstrated yield increases of 30.5% in the Alix cultivar and 14.8% in the Star cultivar, along with significant increases in fruit count, dissolved oxygen availability, and plant vigor. Fruit quality remained unchanged, demonstrating that productivity gains were achieved without sacrificing marketability.
Key Results
Alix Variety Yield Increase: 30.5%
Star Variety Yield Increase: 14.8%
Alix Fruit Count Increase: 34%
Star Fruit Count Increase: 12%
Dissolved Oxygen Increase: 4–5×
Star Stem Biomass Increase: 34%
Star Pruning Biomass Increase: 26%
Fruit Quality Impact: No reduction observed
The Challenge
Blueberry production depends heavily on root health, nutrient uptake, and oxygen availability. Because modern berry operations already operate at high levels of efficiency, even modest improvements in productivity can have substantial economic impact. The objective of this study was to determine whether oxygen nanobubbles could improve crop performance by increasing dissolved oxygen concentrations in the root zone.
Trial Overview
The study was conducted in a high-technology greenhouse in Murcia, Spain. Four-year-old blueberry plants of the Alix and Star cultivars were grown in coconut-fiber substrate under controlled conditions. Two rows received conventional irrigation and two rows received oxygen nanobubble irrigation. All other cultivation practices remained identical.
Why Oxygen Matters
Roots require oxygen for respiration, nutrient uptake, and energy production. The oxygen nanobubble system injected oxygen into the irrigation solution prior to irrigation. Researchers documented dissolved oxygen concentrations approximately four to five times higher than conventional irrigation water. Elevated oxygen concentrations persisted throughout the irrigation system and remained significantly higher than control levels even in drainage water.
Yield Performance
Alix Cultivar:
Control Yield: approximately 218 g/plant
Nanobubble Yield: approximately 285 g/plant
Yield Increase: 30.5%
Star Cultivar:
Control Yield: 990.3 g/plant
Nanobubble Yield: 1,136.8 g/plant
These gains represent meaningful improvements in productivity from a single modification to irrigation water.
Fruit Production
Alix fruit count increased from 144.6 to 193.6 fruits per plant, representing a 34% increase. Star fruit count increased from 677.7 to 757 fruits per plant, representing a 12% increase. Increases were observed across all fruit-size categories.
Plant Vigor and Biomass
For the Star cultivar, stem biomass increased by 34%, pruning biomass increased by 26%, and total crown biomass increased significantly. Researchers concluded that nanobubble-treated plants developed stronger vegetative structures and greater biomass accumulation.
Nutrient Uptake
Leaf analyses demonstrated improvements in nitrogen, phosphorus, sulfur, iron, and zinc concentrations during specific growth stages. These findings suggest enhanced nutrient uptake and utilization efficiency under nanobubble irrigation.
Fruit Quality
Researchers found no significant differences in soluble solids, acidity, pH, fruit color, or other commercial quality parameters. Yield gains were achieved without reducing fruit quality.
Commercial Impact
Illustrative Example:
A 10-acre blueberry farm producing 8,000 pounds per acre at a farm-gate value of $3.50 per pound generates approximately $280,000 in annual revenue. A 14.8% yield increase could add approximately $41,440 annually. A 30.5% yield increase could add approximately $85,400 annually before considering operating costs.
Key Takeaways
Independent validation by the agtech department of a major Spanish university.
30.5% increase in Alix yield.
14.8% increase in Star yield.
34% increase in fruit count for Alix.
12% increase in fruit count for Star.
4–5× increase in dissolved oxygen concentration.
Significant increases in plant biomass and vigor.
About the Research
This study was conducted in 2024 by the agtech department of a major Spanish university specializing in plant nutrition and greenhouse production systems. The work evaluated the effects of oxygen nanobubbles on blueberry yield, fruit quality, plant development, nutrient uptake, and dissolved oxygen dynamics under controlled greenhouse conditions.
