10/07/2026
What if your nutrient program is right, but your root zone is still holding the crop back?
This week’s research looked at how nutrient strength and root-zone oxygen work together in NFT hydroponic mustard production, and the results make a strong case for paying attention to both.
Researchers compared three nutrient strengths under aerated and non-aerated conditions. The best-performing treatment combined 100% Hoagland solution with active aeration.
At the same nutrient strength, adding aeration increased:
• Grain yield by about 25.6%
• Fresh biomass by about 17.6%
• Root growth, chlorophyll levels, and water-use efficiency
The aerated root zones reached roughly 7.8 to 8.6 mg/L dissolved oxygen, compared with 4.2 to 4.8 mg/L without aeration.
But how did researchers track what was happening above ground?
They used the CI-203 Handheld Laser Leaf Area Meter to measure leaf area throughout plant development. The strongest treatment reached 840 cm² of leaf area per plant, giving researchers a quantitative way to connect changes in the root environment with changes in canopy growth.
The bigger takeaway goes beyond mustard or even hydroponics: one measurement rarely tells the whole story. Nutrients, oxygen, roots, canopy growth, water use, and yield all interact.
Read the complete study here: https://www.mdpi.com/2073-4395/16/19/1905