1、Copper

These results clearly indicate that the application of copper-based foliar fertilizer with added zinc and controlled release urea is favorable for tomato.

2、Potential foliar fertilizers with copper and zinc dual micronutrients

Considering the similarity between copper and zinc elements, it would be feasible to develop copper hydroxide nitrate (CHN) nanocrystals as the long-term foliar fertilizer of copper.

3、Potential foliar fertilizers with copper and zinc dual micronutrients

Control preparation, aqueous stability, and ion release of several Cu–Zn-containing crystals in suspensions have been investigated as potential dual micronutrient foliar fertilizers.

Metabolomic Response of Early

Metabolomic Response of Early-Stage Wheat (Triticum aestivum) to Surfactant-Aided Foliar Application of Copper Hydroxide and Molybdenum Trioxide Nanoparticles - PMC

Frontiers

In this study, using lettuce as a test crop, we conducted experiments over two growing seasons to evaluate an improved iodinated copper-based foliar fertilizer derived from traditional Bordeaux mixture (BDM), with treatments differing in iodine form and concentration.

Potential foliar fertilizers with copper and zinc dual micronutrients

These crystals were prepared by quick co-precipitation through simultaneously adding potassium hydroxide and copper salt solutions into zinc salt solution, and characterized in structure and composition with XRD, FTIR, SEM, TEM, and ICP in detail.

Effects of copper

Conclusions Spraying copper-based, iron-copper-based and zinc-boron-copper-based nutritional foliar fertilizers could significantly increase the chlorophyll contents, photosynthetic rates in leaf and lint yields of cotton.

Efficacy of Bacillus subtilis QST 713 formulations, copper hydroxide

Foliar sprays of the aqueous suspension of biofungicide were more effective than foliar sprays of wettable powder formulation of biofungicide and comparable to foliar sprays of copper hydroxide in reducing disease severity on tomato foliage.

(PDF) Efficacy of copper

This study aimed to evaluate, under field conditions, the control of the causal agent of downy mildew using copper-based foliar fertilization, as well as to assess the vegetative development...

Study of the antifungal effect of a copper

In this work, we studied the antifungal effect of this particular foliar fertilizer in an in vitro trial, wherein the fungicide effect on growth and reproduction of specific plant pathogens, i.e., Fusarium graminearum and Drechslera sorokiniana, was evaluated with the agar well diffusion method.

Copper hydroxide is an inorganic compound widely used in agriculture, particularly in foliar fertilization. It provides essential micronutrients such as copper and oxygen, which support plant growth and development. Below is an analysis of the effectiveness of copper hydroxide in different types of foliar fertilizers:

I. Analysis of Copper Hydroxide’s Effects on Foliar Fertilizers

1. Role of Copper

   • Copper is a critical micronutrient for plant growth, involved in photosynthesis, protein synthesis, and cell division. Copper deficiency leads to leaf chlorosis or necrosis.
   • Copper promotes root development, enhances disease resistance, and improves stress tolerance in plants.

2. Role of Oxygen

   • Oxygen participates in key biochemical processes, such as the light reactions of photosynthesis and respiration.
   • Foliar application of copper hydroxide enables rapid absorption of oxygen, accelerating metabolic rates and growth.

3. Synergistic Effects with Other Nutrients

   • Combining copper hydroxide with macronutrients (e.g., nitrogen, phosphorus, potassium) improves fertilizer efficiency and reduces environmental pollution.
   • It forms complexes with other micronutrients (e.g., zinc, manganese, iron), enhancing their bioavailability and uptake.

4. Application Methods and Precautions

   • Apply on sunny, windless days, avoiding extreme temperatures.
   • Adjust concentration and frequency based on plant needs and soil conditions to prevent overgrowth or phytotoxicity.
   • Monitor plant responses and discontinue use if adverse effects occur.

II. Effectiveness of Copper Hydroxide in Different Foliar Fertilizer Types

1. Water-Soluble Foliar Fertilizers

   • Copper hydroxide boosts nutrient absorption and utilization in water-soluble fertilizers.
   • It promotes root development and improves water/nutrient uptake efficiency.

2. Suspension-Type Foliar Fertilizers

   • Copper hydroxide acts as a stabilizer, preventing sedimentation and ensuring even distribution.
   • It enhances shelf life and ease of use for farmers.

3. Solid Foliar Fertilizers

   • Copper hydroxide serves as a carrier or filler, improving bulk density and reducing nutrient loss.
   • It increases stability during storage and transportation.

III. Recommendations and Prospects

1. Innovate Foliar Fertilizer Formulations

   • Develop cost-effective, eco-friendly fertilizers combining copper hydroxide with macronutrients (N-P-K) and micronutrients (Zn, Mn, Fe).
   • Research stable complexes of copper hydroxide with other trace elements to expand agricultural options.

2. Promote Practical Applications

   • Train farmers on copper hydroxide’s benefits through workshops and educational materials.
   • Establish demonstration projects to showcase its efficacy and encourage adoption.

copper hydroxide is a valuable additive in foliar fertilizers, offering significant agricultural potential. By understanding its mechanisms and optimal use, future innovations can advance sustainable farming practices.

Final Note: This translation maintains the original structure while adapting technical terms and expressions for clarity in English. Key agricultural concepts (e.g., "leaf yellowing," "phytotoxicity") are rendered accurately, and practical guidance is preserved for reader accessibility.