Zinc fulvate is an organic micronutrient fertilizer formed by the chelation reaction of mineral-derived fulvic acid and zinc. It is a highly active and easily absorbed plant nutrient regulator.
Zinc fulvate is widely used as an additive in foliar fertilizers, fertigation fertilizers, and drip irrigation fertilizers. It is suitable for various crops such as corn, rice, fruit trees, and vegetables, and is often used in combination with nitrogen, phosphorus, and potassium fertilizers to achieve synergistic effects.
Characteristics of Zinc Fulvate:
1. Chemical nature: A stable chelate formed by small-molecule fulvic acid encapsulating zinc ions, solving the problem of inorganic zinc fertilizers being easily fixed and difficult to absorb.
2. Physical properties: Usually a dark brown or yellow powder/liquid, fully water-soluble, and remains soluble and non-flocculating in a wide pH range (3-12) and in hard water.
3. Absorption advantages: Small molecular weight and high activity allow it to quickly enter the plant through roots or leaves, promoting the transport of zinc from the roots to the above-ground parts.
Applications of Zinc Fulvate:
Zinc fulvate primarily provides crops with rapid zinc supplementation. It utilizes fulvic acid to enhance zinc absorption, while also strengthening crop resistance, increasing yield, and improving quality. Common applications include foliar spraying, fertigation, or basal application; the specific dosage needs to be adjusted according to the crop type.
Functions of Zinc Fulvate:
1. Quickly resolves zinc deficiency: Prevents zinc deficiency symptoms such as little leaf disease and albino seedlings, promotes auxin synthesis, and makes plants stronger.
2. Higher absorption efficiency: After zinc is “encapsulated” (chelated) by fulvic acid, its solubility improves, making it less likely to be fixed by the soil, and easier for crop roots and leaves to absorb.
3. Enhances resistance: Fulvic acid itself can improve soil, enhance crop resistance to drought, cold, and disease, and reduce the occurrence of plant death and root rot.
4. Increases yield and improves quality: Improves fertilizer utilization, promotes photosynthesis, increases crop yield, and improves fruit quality.
Symptoms of Zinc Fulvate Deficiency:
1. When zinc deficiency symptoms are obvious: such as yellowing leaves, spots, stunted growth, or small leaf disease.
2. When soil conditions are poor: for soils with compaction, unbalanced pH, or micronutrient deficiencies, zinc humate can both supplement zinc and improve the soil.
3. When pursuing high yield and quality: suitable for various crops such as vegetables, corn, and rice, especially when used during critical growth stages, it helps to improve yield and quality.
Zinc Fulvate Application Methods:
1. Foliar spray: Dilute the fertilizer 1500-3000 times and spray evenly on the leaves, repeating every 7-15 days.
2. Fertigation or basal application: approximately 1-1.5 kg per acre, which can be applied with irrigation or as a basal application before planting.
3. Mixed Use: It can be mixed with nitrogen, phosphorus, and potassium fertilizers for better results. It is also commonly used as an additive in organic or compound fertilizers.
4. Dosage Adjustment: Different crops have different zinc requirements. It is recommended to adjust the dosage appropriately according to the crop’s growth condition.
Specifically as follows:
1. Foliar Spray (Most Commonly Used)
– Dilution Ratio: Dilute with water 1500-3000 times and spray evenly.
– Frequency of Use: Spray once every 7-15 days. Better results are achieved during key growth stages (such as seedling stage and pre-flowering period).
– Operation Points: Choose sunny mornings or evenings for application, avoiding high temperatures, strong winds, and rainy weather; focus on spraying the undersides of leaves to improve absorption.
2. Root Fertilization or Drip Irrigation
– Dosage per acre: 1-1.5 kg.
– Frequency of Use: Apply via fertigation or drip irrigation once every 7-15 days. Better results are achieved when applied with irrigation water.
– Applicable Scenarios: Suitable for topdressing fruit trees, vegetables, and field crops, quickly replenishing zinc and promoting root growth.
3. Base Fertilizer Mixing
– Dosage per acre: 1-1.5 kg.
– Application Method: Mix with organic fertilizer and NPK compound fertilizer, then spread evenly or apply in furrows, and till into the soil.
– Precautions: Zinc has poor mobility in soil; ensure even application and contact with the root zone.
Precautions for Zinc Fulvate:
1. Mixing Contraindications: Strictly prohibit mixing with alkaline pesticides or fertilizers (such as Bordeaux mixture, lime sulfur), as this may cause reactions and reduce fertilizer efficiency; it can be mixed with acidic or neutral pesticides and NPK fertilizers.
2. Crop Differences: Fruit trees and vegetables are sensitive to zinc; it is recommended to start with a low concentration (high dilution ratio); for field crops, the frequency of application can be appropriately increased.
3. Storage Requirements: Store in a sealed container in a cool, ventilated place, protected from moisture and sunlight.
Key Points for Purchasing Zinc Fulvate:
When purchasing zinc fulvate, focus on the accuracy of zinc content, chelation stability, and compliance with regulations to avoid buying inferior products with false labeling or those prone to precipitation.
1. Zinc Content Compliance: Pay attention to the labeling of active ingredients. Liquid fertilizers typically require Zn ≥ 210g/L (approximately 21%), while solid powders/granules must clearly state the zinc content (commonly ≥ 5%-10%). Be wary of products that only label “fulvic acid content” while obscuring the zinc content.
2. Differentiate Chelation Types: Prefer mineral-derived fulvic acid chelated zinc. Mineral-derived sources (weathered coal/lignite) have high activity and small molecules, resulting in a much higher absorption rate than biochemical sources. Confirm that the label indicates “chelated” or “complexed” to ensure that the zinc element is not easily fixed by the soil.
3. Solubility and Precipitation: Requires complete water solubility and no residue. For drip irrigation systems, special attention must be paid to ensuring that water-insoluble matter is ≤0.5% and that no flocculation or sediment forms after settling, to prevent nozzle clogging.
Shandong Winners manufactures and supplies various humic acid and fulvic acid products. Global customers are welcome to inquire and purchase; we will provide you with the best prices and service.
