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<p>Peach is a&#xa0;highly nutrient-demanding fruit crop and its quality attributes are directly influenced by nutrient availability, particularly nitrogen. However, while conventional urea is effective in delivering only 25–30% nitrogen to plants, nano-urea liquid fertilizer is known to provide over 80%. Therefore, the present study was undertaken to evaluate the extent to which soil-applied nitrogen can be replaced with foliar nano-urea application without compromising fruit quality. The experiment was conducted using a&#xa0;factorial randomized block design comprising four levels of the recommended dose of nitrogen (RDN: 100%, 75%, 50%, and 25%) applied to the soil and five levels of foliar-applied nano-urea (0.01 g&#xa0;N/L, 0.1 g&#xa0;N/L, 1.0 g&#xa0;N/L, 0 g&#xa0;N/L, and 10 g&#xa0;N/L as granular urea) sprayed at the shucks-off stage of fruit development. The results indicated that both soil nitrogen and foliar nano-urea had significant effects on fruit physicochemical characteristics. The highest total soluble solids, ascorbic acid content, fruit firmness, total sugars, reducing sugars, and non-reducing sugars along with the lowest titratable acidity were recorded under the treatment combination of 100% RDN + 0.1 g/L nano-urea (N<sub>1</sub>U<sub>2</sub>), which was statistically similar to 75% RDN + 0.1 g/L nano-urea (N<sub>2</sub>U<sub>2</sub>). Therefore, the combined application of 75% RDN through soil and 0.1 g/L nano-urea as a&#xa0;foliar spray at the shucks-off stage is recommended for improving the fruit quality characteristics of ‘Early Grande’ peach.</p>

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Effect of Foliar Nano-Urea Application on Physicochemical Characteristics of Peach at Reduced Levels of Soil-Applied Nitrogen

  • 期刊论文

  • 发表日期：

    2025年6月24日

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  • Ritik Chawla,
  • Shashi Kumar Sharma

摘要

Peach is a highly nutrient-demanding fruit crop and its quality attributes are directly influenced by nutrient availability, particularly nitrogen. However, while conventional urea is effective in delivering only 25–30% nitrogen to plants, nano-urea liquid fertilizer is known to provide over 80%. Therefore, the present study was undertaken to evaluate the extent to which soil-applied nitrogen can be replaced with foliar nano-urea application without compromising fruit quality. The experiment was conducted using a factorial randomized block design comprising four levels of the recommended dose of nitrogen (RDN: 100%, 75%, 50%, and 25%) applied to the soil and five levels of foliar-applied nano-urea (0.01 g N/L, 0.1 g N/L, 1.0 g N/L, 0 g N/L, and 10 g N/L as granular urea) sprayed at the shucks-off stage of fruit development. The results indicated that both soil nitrogen and foliar nano-urea had significant effects on fruit physicochemical characteristics. The highest total soluble solids, ascorbic acid content, fruit firmness, total sugars, reducing sugars, and non-reducing sugars along with the lowest titratable acidity were recorded under the treatment combination of 100% RDN + 0.1 g/L nano-urea (N1U2), which was statistically similar to 75% RDN + 0.1 g/L nano-urea (N2U2). Therefore, the combined application of 75% RDN through soil and 0.1 g/L nano-urea as a foliar spray at the shucks-off stage is recommended for improving the fruit quality characteristics of ‘Early Grande’ peach.