Copper is a vital micronutrient for plants, playing a key role in enzyme systems, photosynthesis, and disease resistance. However, in many soils, copper becomes unavailable due to chemical reactions that cause it to precipitate. To overcome this, EDTA (Ethylenediaminetetraacetic acid) is used to produce chelated copper fertilizers.
Liquid EDTA chelated copper (Cu-EDTA) fertilizers provide a highly soluble and stable form of copper, ensuring efficient plant uptake and fast correction of deficiencies.
RAW MATERIALS REQUIRED
To produce liquid EDTA chelated copper fertilizer, the following materials are typically used:
- EDTA acid or disodium EDTA (chelating agent)
- Copper sulfate pentahydrate (CuSO₄·5H₂O)
- Sodium hydroxide (NaOH) for neutralization
- Deionized water
High purity raw materials are essential for achieving complete chelation and product stability.
HOW TO MAKE LIQUID EDTA CHELATED COPPER
Step 1: Prepare EDTA Solution
Add EDTA acid into deionized water under continuous stirring. Slowly add sodium hydroxide to neutralize the EDTA and convert it into soluble sodium EDTA.
Step 2: Adjust pH
Adjust the solution pH to around 6–7. This creates optimal conditions for the chelation reaction.
Step 3: Prepare Copper Solution
Dissolve copper sulfate separately in water to form a clear copper solution.
Step 4: Chelation Reaction
Slowly add the copper solution into the EDTA solution while stirring continuously. Maintain the temperature around 40–60°C to ensure proper reaction.
Step 5: Stabilization
After complete addition, adjust the pH to a stable range of 5–6. Continue mixing until the solution becomes uniform and stable.
Step 6: Filtration and Final Product
Filter the solution to remove any insoluble particles. The final product is a clear liquid Cu-EDTA fertilizer ready for use or packaging.
KEY PROPERTIES OF LIQUID Cu-EDTA
- High water solubility
- Stable chelated structure
- Resistant to precipitation
- Compatible with most fertilizers
- Fast plant absorption
BENEFITS OF LIQUID EDTA CHELATED COPPER
Using liquid Cu-EDTA fertilizer provides several advantages:
- Rapid deficiency correction through foliar application
- Improved nutrient availability in soil and hydroponic systems
- Enhanced plant metabolism and enzyme activity
- Increased disease resistance in crops
- Better crop yield and quality
- Uniform nutrient distribution in fertigation systems
APPLICATION METHODS
Liquid EDTA chelated copper can be applied in multiple ways:
- Foliar spraying for quick results
- Fertigation systems for continuous feeding
- Hydroponic nutrient solutions
- Soil application in micronutrient-deficient areas
SUMMARY
Liquid EDTA chelated copper fertilizer is produced through a controlled reaction between EDTA and copper sulfate under optimized pH and temperature conditions. The resulting product is highly soluble, stable, and efficient in delivering copper to plants. Its fast absorption and strong performance make it an essential component of modern agricultural fertilization programs.
