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<p>Guava (<i>Psidium guajava</i>&#xa0;L.) is an economically important fruit crop, yet its productivity and fruit quality are often constrained by low nutrient-use efficiency. Nanoparticle-based fertilizers have attracted attention as a&#xa0;strategy to improve nutrient uptake and crop performance; however, information on their use in guava remains limited. Therefore, this study evaluated the effects of foliar applications of nanoparticle-based urea, calcium, and magnesium on the growth, flowering, yield, and fruit quality of Allahabad Safeda guava. The experiment was conducted in a&#xa0;randomized block design with six treatments and four replications. The results revealed that foliar application of NP urea (0.4%) + NP magnesium (0.3%) significantly enhanced vegetative growth, flowering, fruit set, and yield, resulting in the highest fruit yield (26.13 kg of tree⁻<sup>1</sup>). In contrast, NP urea (0.4%) + NP calcium (0.5%) produced superior fruit quality attributes, including greater fruit weight, firmness, and total soluble solids, with lower acidity. These findings indicate that the combined foliar application of nanoparticle-based nutrients can effectively improve guava productivity and fruit quality, suggesting a&#xa0;promising approach for sustainable nutrient management in guava cultivation.</p>

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Smart Foliar Nano-Inputs Improve the Growth, Yield and Physicochemical Traits of Guava cv. Allahabad Safeda

  • 期刊论文

  • 发表日期：

    2026年7月1日

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  • Kondle Ravi,
  • Prashant Kumar

摘要

Guava (Psidium guajava L.) is an economically important fruit crop, yet its productivity and fruit quality are often constrained by low nutrient-use efficiency. Nanoparticle-based fertilizers have attracted attention as a strategy to improve nutrient uptake and crop performance; however, information on their use in guava remains limited. Therefore, this study evaluated the effects of foliar applications of nanoparticle-based urea, calcium, and magnesium on the growth, flowering, yield, and fruit quality of Allahabad Safeda guava. The experiment was conducted in a randomized block design with six treatments and four replications. The results revealed that foliar application of NP urea (0.4%) + NP magnesium (0.3%) significantly enhanced vegetative growth, flowering, fruit set, and yield, resulting in the highest fruit yield (26.13 kg of tree⁻1). In contrast, NP urea (0.4%) + NP calcium (0.5%) produced superior fruit quality attributes, including greater fruit weight, firmness, and total soluble solids, with lower acidity. These findings indicate that the combined foliar application of nanoparticle-based nutrients can effectively improve guava productivity and fruit quality, suggesting a promising approach for sustainable nutrient management in guava cultivation.