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<p>Silicon has been utilized to reduce the detrimental impacts of biotic and abiotic stressors in various fruit crops. This experiment was conducted over the two consecutive seasons of 2022 and 2023 in order to study the effect of foliar spraying with different forms of silicon such as potassium silicate at 0.3&#xa0;and 0.6% or aluminum silicate at 2&#xa0;and 4% plus control treatment (tap water) to mitigate heat stress on <b>‘</b>Hass<b>’</b> and <b>‘</b>Red<b>’</b> avocado varieties. Changes in leaf area (cm<sup>2</sup>), total leaf chlorophyll, mineral content, fruit set (%), fruit retention (%), fruit number, yield (kg)/tree and fruit sunburn (%) were determined. In addition, the quality attributes of avocado fruits such as fruit weight (gm), fruit dimensions (cm), firmness (Ib/in<sup>2</sup>), total soluble solids (%), total acidity (%), ascorbic acid content (vitamin&#xa0;C, mg\100 g), chlorophyll&#xa0;(a), chlorophyll&#xa0;(b), total carotenoids content (mg/g F.W.) and fruit oil content (%) were measured. The obtained results showed that all parameters under investigation were positively affected by the different silicate treatments used. High concentrations of both silicon forms (potassium and aluminum) achieved the highest values compared to low concentrations and control treatment. In conclusion, foliar spraying of aluminum silicate at 4% and potassium silicate at 0.6% were the most effective treatments to enhance leaf area, total leaf chlorophyll and nutritional value. It also reduced fruit sunburn and fruit retention (%), and improved yield, fruit quality as well as physical and chemical properties.</p>

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Potassium and Aluminum Silicate Application to Alleviate the Adverse Effects of Heat Stress on ‘Hass’ and ‘Red’ Avocado Trees

  • 期刊论文

  • 发表日期：

    2026年1月26日

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  • Eman A. A. Abd El-Moniem,
  • Aml R. M. Yousef,
  • Thanaa Sh. M. Mahmoud,
  • Ola A. Emam,
  • F. M. Rohim,
  • Safaa R. El-lethy

摘要

Silicon has been utilized to reduce the detrimental impacts of biotic and abiotic stressors in various fruit crops. This experiment was conducted over the two consecutive seasons of 2022 and 2023 in order to study the effect of foliar spraying with different forms of silicon such as potassium silicate at 0.3 and 0.6% or aluminum silicate at 2 and 4% plus control treatment (tap water) to mitigate heat stress on ‘Hass’ and ‘Red’ avocado varieties. Changes in leaf area (cm2), total leaf chlorophyll, mineral content, fruit set (%), fruit retention (%), fruit number, yield (kg)/tree and fruit sunburn (%) were determined. In addition, the quality attributes of avocado fruits such as fruit weight (gm), fruit dimensions (cm), firmness (Ib/in2), total soluble solids (%), total acidity (%), ascorbic acid content (vitamin C, mg\100 g), chlorophyll (a), chlorophyll (b), total carotenoids content (mg/g F.W.) and fruit oil content (%) were measured. The obtained results showed that all parameters under investigation were positively affected by the different silicate treatments used. High concentrations of both silicon forms (potassium and aluminum) achieved the highest values compared to low concentrations and control treatment. In conclusion, foliar spraying of aluminum silicate at 4% and potassium silicate at 0.6% were the most effective treatments to enhance leaf area, total leaf chlorophyll and nutritional value. It also reduced fruit sunburn and fruit retention (%), and improved yield, fruit quality as well as physical and chemical properties.