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EDTA Cu(NH4)2

General Properties and Industrial Significance:

EDTA-Cu(NH₄)₂ is a copper chelate, where copper (Cu²⁺) is bound to EDTA (ethylenediaminetetraacetic acid), and the complex is neutralized with two ammonium (NH₄⁺) ions. It is a water-soluble, stable form of copper, used in agricultural applications to provide copper to plants in a bioavailable form.

EDTA-Cu(NH₄)₂ is a copper fertilizer in which copper is chelated (or bound) by EDTA to maintain its solubility and bioavailability.

The ammonium ions (NH₄⁺) are used to balance the charge of the chelate and contribute a small nitrogen source for plant nutrition.

 

Applications:

  • Agriculture:

  1. Copper deficiency correction: Used to treat or prevent copper deficiencies in plants, especially in crops like citrus, tomatoes, corn, soybeans, and ornamentals.
  2. Copper is essential for:
    • Enzyme activation: Important in various metabolic processes.
    • Chlorophyll production: Supports photosynthesis.
    • Lignin synthesis: Important for strengthening plant cell walls.
    • Reproductive development: Aids in flower and seed formation.

  • Application Methods:

  1. Soil application: Directly applied to soil to provide copper in a plant-available form.
  2. Foliar sprays: Applied to leaves for quick uptake by plants.
  3. Fertigation: Delivered through irrigation systems to ensure even nutrient distribution.
  4. Hydroponics: Used in water-based growing systems where copper must remain soluble and available.
 

Key Benefits:

  • Bioavailability:

The EDTA chelation keeps copper in a form that is easily absorbed by plants, even in slightly alkaline or neutral soils.

  • Prevents copper lock-up:

In high pH or alkaline soils, where copper tends to become insoluble, EDTA helps maintain the copper in solution.

  • Ammonium ions (NH₄⁺):

Besides balancing the charge, the ammonium also provides a small nitrogen source for plants, which can be beneficial for their overall growth.

  • Effective in a variety of pH levels:

Especially useful in slightly acidic to neutral soils where copper may otherwise become unavailable to plants.

Summary:

EDTA-Cu(NH₄)₂ is a copper chelate fertilizer used to correct copper deficiencies in plants. The EDTA chelation ensures that copper remains soluble and available for plant uptake, and the ammonium ions (NH₄⁺) contribute to nitrogen nutrition. This form of copper is particularly effective in neutral to slightly alkaline soils where copper might become immobilized.