Borgmann Aquaponics Hydroponics
Yes, but with limitations: Ammonium nitrate (NH₄NO₃) can be used in hydroponics, but must be dosed carefully.
Components of ammonium nitrate
- NH₄⁺ (ammonium) – plant available, but potentially toxic
- NO₃⁻ (nitrate) – well tolerated, main nitrogen source
advantages
- Supplies two forms of nitrogen
- May contribute to pH stabilization (NO₃⁻ basic, NH₄⁺ acidic)
Risks & Constraints
- Ammonium toxicity: Harmful at high concentration or low pH
- pH shift: NH₄⁺ lowers the pH value in the substrate
- Safety aspects: NH₄NO₃ is regulated (Explosives Regulation, EU)
Recommended application
maximum 5–10% of total nitrogen should come from NH₄⁺.
The majority via nitrate sources such as Ca(NO₃)₂ and KNO₃. Regular pH control is crucial.
Example combination in nutrient solutions
| fertilizer | function |
|---|---|
| Ca(NO₃)₂ | Nitrate + calcium |
| KNO₃ | nitrate + potassium |
| NH ₄NO₃ | additional NH₄⁺ nitrogen (dose carefully) |
| MgSO₄ | Magnesium + sulfur |
| KH₂PO₄ | Potassium + phosphate |
sources
“Ammonium nitrate may be used to partially replace nitrate forms of nitrogen, but excessive ammonium can inhibit uptake of other nutrients and cause pH instability.” – Resh, HM (2012), Hydroponic Food Production“Ammonium supply should not exceed 10% of total nitrogen to avoid toxicity and growth suppression.” – Sonneveld, C. & Voogt, W. (2009), Plant Nutrition of Greenhouse Crops
EU Fertilizer Regulation (Reg. EU 2019/1009)
conclusion
Ammonium nitrate can be used under controlled conditions. Please note: Dose, pH control and storage according to regulations.
Add Comment