1、Zinc fertilizers for Citrus production: assessing nutrient

In the present work, we studied the effects of different application methods of fertilizer containing Zn on the fruit yield and quality of young citrus trees in the field, assessing plant nutritional status and biochemical parameters related to ROS scavenging.

2、nutrient supply via fertigation or foliar application Zinc fertilizers

Citrus trees are severely affected by zinc (Zn) de ciency, which impairs plant growth and fruit yield. Zn fertilization is usually recommended in eld o.

3、Foliar application of zinc

Zinc (Zn) is an essential nutrient that impacts fruit quality, improves human health, and can help plants biochemically adapt to the adverse effects of climate change.

Uptake and Distribution of Soil Applied Zinc by Citrus Trees—Addressing

Leaf sprays containing micronutrients are commonly applied to orchards, even though the nutrient supply via soil could be of practical value. This study aimed to evaluate the effect of Zn fertilizers that are applied to the soil surface on absorption and partitioning of the nutrient by citrus trees.

ZINC NUTRITION OF FRUIT TREES BY FOLIAR SPRAYS

Abstract Effective methods of supplying Zn to fruit trees are needed to combat widespread deficiency of this element all over the world. Soil applications are not very effective because the roots of fruit crops occupy deep soil layers and zinc does not easily move in the soil.

ZINC NUTRITION OF FRUIT TREES BY FOLIAR SPRAYS

Effective methods of supplying Zn to fruit trees are needed to combat widespread deficiency of this element all over the world. Soil applications are not very effective because the roots of fruit crops occupy deep soil layers and zinc does not easily move in the soil.

Zinc fertilizers for Citrus production: assessing nutrient supply via

Zn fertilization is usually recommended in field orchards, and application strategies toward nutrient use efficiency are key for successful crop management.

How and When to Use Zinc for Healthy, Productive Fruit Plants

Learn when and how to apply zinc to fruit plants to fix deficiencies, boost growth, and increase yields. Simple tips for home gardeners and farmers!

Zinc fertilizers for Citrus production: assessing nutrient supply via

Therefore, this study evaluated the effects of Zn fertilizer sources and application methods, either via fertigation or foliar application, on the nutritional status, fruit yield, and quality of young-bearing sweet orange trees under field conditions.

Zinc

Since that time, numerous methods of applying Zn to fruit trees have been evaluated, including soil applications, trunk injection, and foliar sprays. Soil applications are usually ineffective unless very high rates are used, causing risks of tree injury or death and permanently contaminating the soil with phytotoxic levels of Zn.

Zinc fertilizer is one of the essential micronutrient fertilizers in fruit tree cultivation. It significantly impacts plant growth, development, and fruit quality. Below is a detailed guide on applying zinc fertilizer to fruit trees.

I. Functions of Zinc Fertilizer

1. Promotes Growth: Zinc plays a critical role in regulating enzyme activity within plants, aiding cell division and elongation, thereby accelerating growth.
2. Enhances Resistance: Zinc fertilization strengthens a plant’s defense against pests and diseases, reducing infection risks and improving overall stress resistance.
3. Improves Quality: Zinc promotes sugar accumulation in fruits, enhances taste and nutritional value, and improves color, making fruits more visually appealing.
4. Supports Flower Bud Differentiation: Proper zinc application stimulates flower bud formation, increases fruit-setting rates, and boosts yield.
5. Boosts Root Development: Zinc encourages root growth, strengthens nutrient and water absorption efficiency, and optimizes resource utilization.

II. Methods for Applying Zinc Fertilizer

1. Soil Testing

Before application, conduct soil tests to determine zinc levels and pH. This ensures precise dosing—avoiding both deficiencies and excesses—for optimal results.

2. Base Fertilization

Apply zinc as a base fertilizer during planting or in the first year of establishment. Use slow-release or water-soluble zinc formulations to prevent rapid leaching from the soil.

3. Foliar Spraying

For soils lacking zinc or when deficiency symptoms (e.g., stunted growth, leaf chlorosis) appear, apply zinc via foliar spraying. Ensure proper dilution to avoid phytotoxicity.

4. Root-Side Dressing

For mature trees, top-dress with zinc fertilizer after fruit harvest or before spring budding. Apply near the root zone to replenish zinc reserves and support recovery and future yields.

5. Synergistic Fertilization

Combine zinc with other nutrients:

• Nitrogen: Enhances zinc uptake efficiency.
• Phosphorus: Stimulates root growth.
• Potassium: Strengthens disease resistance.

III. Key Considerations

1. Avoid Overapplication: Excessive zinc accumulates in soil, disrupting microbial balance and harming plant health. Stick to recommended doses.
2. Observe Safety Intervals: Separate zinc applications from pesticides to prevent chemical interactions that reduce efficacy. Follow labeled waiting periods.
3. Avoid Acid Mixing: Zinc reacts poorly with acidic substances (e.g., certain pesticides or fertilizers). Apply separately to maintain effectiveness.
4. Soil pH Matters: Zinc absorption peaks in neutral to slightly acidic soils (pH 6–7). For acidic soils, adjust pH (e.g., with lime) before applying zinc.

Effective use of zinc fertilizer depends on soil conditions, tree growth stages, and market goals. By adopting scientific methods and precautions, growers can maximize fruit quality and yield while maintaining sustainable orchard practices.