1、Effects of foliar fertilizer additives on grape fruit quality and

The effects of different foliar fertilizer adjuvants on grape fruit quality and endogenous hormones in leaves were explored through a solar greenhouse experiment.

2、Foliar spraying of potassium sulfate during fruit development

In this study, three different potassium fertilizers and one water (F1: 0.65% KNO 3, F2: 0.88% KH 2 PO 4, F3: 0.56% K 2 SO 4, and F4: water) were sprayed on Citrus reticulata cv. Nanfeng at cell division, cell expansion, fruit ripening, and throughout fruit developmental stages, respectively.

3、(PDF) Properly Timing Foliar

Foliar fertilization efficiently meets the nutrient demand of tree fruit crops during periods when soil conditions (low or high temperatures, low or excess soil moisture, pH, salinity)...

Calcium and Boron Foliar Fertilizer to Relieve Cracking of

The aim of this study was to illustrate the effect of foliar sprays of calcium (Ca) and boron (B) and their combined treatments on the fruit cracking and quality of ‘Liuyuezao’ pummelos during the fruit expansion period (40–55 days after flowering).

Effects of foliar fertilizer application on the growth and fruit

Melons treated with foliar fertilizers had better measures of fruit quality including: fruit weight, fruit height, fruit perimeter, pulp thickness, rind thickness, firmness, TSS, EC, TA, and pulp colors.

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With less water of good quality available to leach accumulating nutrient (fertilizer) salts from orchard soils, cost-effective foliar fertilization strategies that replace a portion of the fertilizer applied to the soil will contribute to the sustainability of the tree-fruit industries.

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

Chelated foliar fertilizers are effective for improving element utilization efficiency, crop yield, and quality. The physicochemical properties, molecular structure, chelating strength, and chelating rate of chelating agents modulate the effects of application of nutrients.

Foliar Fertilizer Application Technology: Precision Application Guide

Nutrient requirements can be precisely matched according to the crop growth stage: focusing on nitrogen fertilizer for growth during the seedling stage, boron fertilizer for pollination during the flowering period, and potassium fertilizer for ripening during the fruit expansion period.

Properly Timing Foliar

Low-biuret urea and potassium phosphite are effective foliar treatments, enhancing yields and fruit quality. Replacing soil fertilizers with foliar applications can mitigate environmental issues related to nutrient runoff.

Effects of Foliar Fertilization on Nutrient Uptake, Yield, and Fruit

The results indicated that the P, K, and Mg concentrations in leaves and fruits were significantly enhanced after the spraying of solutions FF1 and FF2 compared with the control and FF3. The application of FF1 and FF2 greatly improved the fruit quality, and the fruit yield response was as high as 4.0-5.0 t ha −1.

The fruit expansion period is a critical stage in fruit tree growth, characterized by rapid fruit enlargement and increased nutrient demands. Applying foliar fertilizers properly during this phase can significantly enhance fruit quality and yield. Below is a detailed guide to selecting, applying, and managing foliar fertilizers during this key period.

I. Types of Foliar Fertilizers

1. Nitrogen Fertilizers Nitrogen is essential for plant growth, particularly for leaf development. During the fruit expansion period, moderate nitrogen application promotes lush foliage, which supports photosynthesis and provides energy for fruit enlargement. excessive nitrogen may lead to excessive vegetative growth, negatively impacting fruit quality.

2. Phosphate Fertilizers Phosphorus strengthens root systems, enhances disease resistance, and improves fruit color, texture, and sugar content. Proper phosphate application during this stage boosts the nutritional value and sweetness of fruits.

3. Potassium Fertilizers Potassium regulates water balance, improves drought and cold resistance, and enhances fruit flavor and sweetness. Deficiencies may reduce fruit quality and taste.

4. Micronutrient Fertilizers Elements like calcium (Ca) and magnesium (Mg) are vital for metabolic processes, influencing fruit firmness, color, and storage life. Supplementing micronutrients during expansion improves texture and shelf stability.

5. Compound Fertilizers Commercial compound fertilizers formulated for fruit trees often contain balanced ratios of essential nutrients, ensuring comprehensive nutrition without over- or under-supply of single elements.

II. Application Methods

1. Dilution Ratio Follow product instructions for dilution. Lower dilution ratios (higher concentration) improve efficacy, but excessive concentrations may damage plants.

2. Timing Apply in the morning or evening under sunny, calm conditions. Avoid midday heat to prevent leaf scorching.

3. Spraying Technique Use a sprayer to evenly coat leaves, avoiding fruit and stems. Ensure full coverage for optimal absorption.

4. Frequency Apply every 7–10 days during expansion, repeating 2–3 times. Adjust based on tree species and growth stage.

5. Dosage Tailor volume to tree size, age, and growth stage. Overapplication risks toxicity, while insufficient doses may be ineffective.

III. Key Considerations

1. Avoid Mixing with Pesticides Do not combine foliar fertilizers with pesticides or chemicals, as interactions may harm plants.

2. Monitor Crop Response Observe plants post-application. Discontinue use if abnormalities occur (e.g., leaf burn, stunted growth).

3. Follow Label Instructions Adhere to recommended dosages and guidelines. Avoid arbitrary adjustments.

4. Soil and Climate Adaptation Select fertilizers based on local conditions. For example, prioritize potassium in dry regions to boost drought resistance, or nitrogen in rainy areas to stimulate growth.

5. Integrated Management Combine foliar fertilization with irrigation, pest control, and other practices to ensure healthy trees and maximize yield/quality.

The fruit expansion period demands careful nutrient management. By choosing appropriate foliar fertilizers, following proper application techniques, and addressing environmental factors, growers can optimize fruit quality and productivity. Prioritizing balanced nutrition and avoiding mismanagement ensures healthy trees and superior harvest outcomes.