1、Optimizing Citrus Production: Practical Guidelines for Effective Foliar

For example, pre-bloom foliar applications, carried out in early spring before full flowering, are particularly effective because they support the initiation of flowering, the development of reproductive organs, and the early stages of leaf and shoot expansion.

2、Foliar nutrition: Potential and challenges under multifaceted

The potential of foliar fertilization in improving crop yield and quality under environmental stresses has been evaluated based on a meta-analysis. Foliar-applied fertilizers showed higher crop plants yield and quality traits by 15–19% and 9–29%, respectively, under different environmental stresses.

3、Properly Timing Foliar

The goal has been to time the application of foliar fertilizers to key stages of citrus (Citrus sp.) and avocado (Persea americana) tree phenology when demand for the nutrient is likely to be high and especially when soil conditions are likely to compromise nutrient uptake by roots.

4、ALL FOLIAR FERTILIZATION CAN AND SHOULD RESULT IN A YIELD BENEFIT AND

Soil-applied fertilizers should be replaced in part with foliar-applied fertilizers. Foliar fertilizers can meet the crop's nutrient demand when soil temperature, moisture, pH, or salinity renders soil-applied fertilizers ineffective.

5、Orange Tree Fertilizer Requirements

Fertilizers should not be applied during dormancy. For optimal results, most of the total nitrogen (2/3) needed is usually applied during spring (or late winter) from the start of vegetation growth to the fruit set. The rest can be applied in early fall. Late applications should be avoided.

Effects of Foliar Fertilization: a Review of Current Status and Future

Comprehensive studies have shown that spraying chelated fertilizer on leaves can reduce the total amounts of fertilizer applied and achieve high fertilizer efficiency.

Fertilizer Types for Durian Trees and How I Use It (With Photos)

It is good practice and recommended by the Agricultural Department that foliar sprays be applied during early morning when the leaves are wet with morning dew. In Peninsular Malaysia this would mean ideal spraying time would be between 7.00 am until 9.00 am.

Properly Timed Foliar

Field research with navel orange, Valencia and mandarin cultivars documented the efficacy of foliar applications of low-biuret urea or potassium phosphite made between the last week of June and mid-July.

Citrus Fertilizer Management: Nutrient Requirements and Application

Citrus fertilizers can be applied in various forms and methods, such as granular, liquid, and foliar. The timing and frequency of fertilizer application depend on the nutrient demand of the citrus trees, with the highest demand during spring and summer and the lowest during winter.

Tree Fruit News: Nutrient Management in Apple Orchards for the 2026

During this period, rapid shoot growth and fruit cell division require substantial amounts of nitrogen. Nutrition studies have shown maintaining leaf N levels between 2.0 to 2.2% balances adequate tree growth with high fruit quality.

The early shoot stage is a critical phase in the growth cycle of orange trees, marking the emergence of new leaves and increased nutrient demands. Proper fertilization management during this period is essential for promoting healthy plant growth. This article explores whether foliar fertilization is advisable during the early shoot stage and provides practical recommendations.

I. Importance of the Early Shoot Stage

1. Nutrient Accumulation

The early shoot stage is crucial for nutrient accumulation in orange trees. As new leaves develop, the tree requires additional nutrients to support its growth. Applying appropriate fertilizers during this period helps the tree store essential nutrients, laying a solid foundation for subsequent stages.

2. Growth Promotion

Foliar fertilizers are directly absorbed by leaves, rapidly replenishing nutrients. This boosts overall growth rates and yields, particularly when soil fertilization is insufficient.

3. Enhanced Stress Resistance

Proper foliar fertilization strengthens the tree’s disease resistance. By supplying key nutrients, plants can better fend off pests and diseases, reducing reliance on pesticides and supporting eco-friendly practices.

II. Selection and Application of Foliar Fertilizers

1. Fertilizer Types

Choose fertilizers based on their composition and purpose. Foliar fertilizers typically include macronutrients (e.g., nitrogen, phosphorus, potassium) and microelements. Selecting the right type depends on the specific needs of orange trees during the early shoot stage.

2. Application Methods

• Apply foliar sprays in calm or mild wind conditions to ensure even absorption.
• Follow dosage guidelines on product labels to avoid over-fertilization and potential damage.

3. Precautions

• Use high-quality fertilizers to prevent adverse effects.
• Monitor the tree for abnormalities (e.g., leaf yellowing, stunted growth). Discontinue use and consult experts if issues arise.
• Adjust strategies flexibly to match different growth stages.

III. Comprehensive Management Practices

1. Soil Management

Soil health is equally important. Maintain optimal pH, practice crop rotation, and improve soil structure through deep tillage to enhance fertility and plant performance.

2. Irrigation Management

Ensure adequate water supply based on weather and soil moisture. Avoid water stress or root damage from excessive flooding.

3. Pest and Disease Control

Regularly inspect plants for signs of pests or diseases. Employ integrated pest management (IPM) strategies, combining biological and chemical controls as needed.

Foliar fertilization is viable during the early shoot stage of orange trees, but careful selection of fertilizer types and adherence to application guidelines is essential. Additionally, integrating soil management, irrigation, and pest control ensures holistic tree health. Scientific fertilization and management during this stage optimize nutrient uptake, paving the way for robust growth and higher yields.

Key Terms: Foliar fertilization, early shoot stage, nutrient management, citrus cultivation, integrated pest management (IPM).