Agricultural Nanobubbles Explained: Hydrogen, Oxygen and What Each One Does
Nanobubble irrigation is sold under a single label for at least three different gases, which makes it hard to compare products honestly. This page separates the delivery method from the gas, sets out what oxygen and air nanobubbles do, what hydrogen nanobubbles do, and why the two are compatible rather than competing. YBG Global supplies a hydrogen system and does not supply oxygen nanobubble equipment — that is stated up front so this reads as a technology map rather than a pitch.
A nanobubble is a gas bubble below roughly 200 nanometres: it has negligible buoyant lift, so it does not rise and burst at the surface and instead stays dispersed through the irrigation line. Oxygen and air nanobubbles and hydrogen nanobubbles use that same delivery physics for entirely different purposes — oxygen works by gas transfer to raise dissolved oxygen for root respiration, hydrogen delivers a non-oxidising gas with a different mechanism in plant tissue. This page explains both, and the two can be run together.
What a nanobubble actually is
Scale is the whole distinction. Micro-bubbles are measured in microns: they read as visible cloudiness, rise within seconds to minutes and vent at the surface. Nanobubbles are sub-micron — below about 200 nm — optically clear, and carry so little buoyant lift that they remain in suspension long enough to be carried through a pressurised network, past the pump and filter bank, and out at the emitter.
That is why dispersion matters more than gas volume in an irrigation context. Gas that vents in the mixing tank never reaches the root zone regardless of how much of it was introduced. The engineering objective is not "more gas" but "gas that survives the journey".
Same delivery physics, different gas, different mechanism
Gas transfer
The mechanism is straightforward mass transfer: dispersing oxygen or air at nano scale raises dissolved oxygen in the water, supporting aerobic conditions and root respiration in soil, substrate or nutrient solution. Dissolved oxygen is a well-documented agronomic variable with a mature literature and established measurement practice behind it.A selective reducing species
Molecular hydrogen is not an oxidant and is not consumed by respiration the way oxygen is. Plant-biology research discusses it as a selective reducing species and a stress-response signal in plant tissue. It is a different mechanism entirely — not a stronger version of oxygenation, and not a replacement for it.Stated as an honest technology map: oxygen nanobubble systems do a real job with real evidence behind it, and nothing on this page is intended to argue otherwise. The point is only that the two gases answer different questions, so evidence gathered on one does not transfer to the other. The related terminology question — molecular hydrogen versus oxyhydrogen or HHO gas mixtures — is covered under hydrogen vs. oxyhydrogen for irrigation.
Which gas turns up where
Oxygen and air nanobubbles: water oxygenation, aquaculture and recirculating-system water quality, and hydroponic nutrient-solution oxygenation where dissolved oxygen at the root is the controlled target.
Ozone nanobubbles: disinfection and oxidisable load in irrigation water treatment and remediation — a treatment duty, not a conditioning one.
Hydrogen nanobubbles: delivering dissolved molecular hydrogen to the root zone for the plant-physiology response HERO Irrigation targets, at 3,000–5,000 ppb measured with a dissolved-gas sensor. What has actually been recorded in field trials is set out on hydrogen water in agriculture.
Published research on hydrogen-rich irrigation water is early-stage and study-specific. Trial figures on this page are reported outcomes from the trials named, not projections for your site. No yield, disease, plant-health or therapeutic claims are made.
Compatible, not competing
Adding hydrogen infusion does not displace or replace an existing dissolved-oxygen programme. A grower can run both: an oxygenation or aeration stage managing dissolved oxygen to its own setpoint, and inline hydrogen infusion logged separately in parts per billion. They occupy different rows in the water log and neither cancels the other.
The same holds for filtration and disinfection. Hydrogen infusion is a water-conditioning step on treated water, downstream of the filter bank — it is not a filtration, disinfection or remediation device and should never be specified in place of one.