Citrus salinity stress treatment using foliar nutrients has proven to be a sustainable solution for improving citrus growth and yield under harsh soil conditions. In Egypt’s El-Bustan region, where soil salinity levels reach 3.40 dS/m, Valencia orange trees showed marked improvements with foliar applications of salicylic acid, potassium silicate, and Agri Weet, an organic silicone surfactant.
Why Use Foliar Nutrients for Salinity Stress?
Salicylic Acid
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A natural phenolic compound that regulates stress responses
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Enhances stomatal conductance, ion uptake, and photosynthesis
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Application of 400 ppm salicylic acid increased yield by 32.74%
Potassium Silicate
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Boosts chlorophyll levels and fruit firmness
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Reduces sodium uptake and improves K/Na balance
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Application of 2000 ppm potassium silicate raised yield by 42.36%
The Role of Agri Weet Silicone Adjuvant
Agri Weet is an organic silicone surfactant that improves foliar spray effectiveness under salinity stress. It reduces surface tension, allowing nutrients like salicylic acid and potassium silicate to spread and adhere better to leaves.
Agri Weet Key Benefits:
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Ensures even nutrient coverage on plant surfaces
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Prevents spray wash-off due to irrigation or rain
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Enhances nutrient and pesticide absorption
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Safe pH range: 5–9 for maximum effect
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Dosage: 10–25 ml per 100L water depending on application
Agri Weet improves spray adhesion and absorption on citrus leaves
How to Apply Foliar Nutrients Effectively
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Timing: Spray twice — once at full bloom and again two weeks later
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Dosage: Use 400 ppm salicylic acid or 2000 ppm potassium silicate
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Adjuvant: Add Agri Weet to enhance absorption and retention
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Water Quality: Ensure pH remains between 5 and 9 for stability
Research Results: Citrus Salinity Stress Treatment Success
With regular application of these treatments:
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Leaf chlorophyll content improved
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Fruit peel firmness and color enhanced
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Total soluble solids/acidity ratio increased
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K/Na ratio balanced
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Proline accumulation (a stress marker) reduced
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Soil pH and EC showed minor reductions
