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<p>The present investigation was undertaken to evaluate the effect of tree age on leaf nutrient status, flowering behaviour, physiological traits, yield and fruit quality of ‘Amrapali’ mango (<i>Mangifera indica</i>&#xa0;L.) under an intensive planting system (4.5 × 4.5 m). Three age groups of trees, viz., 10, 20 and 30&#xa0;years (control), were studied. Leaf nutrient analysis revealed that nitrogen content was higher in 10- and 20-year-old trees compared to 30-year-old trees. Phosphorus content was approximately 46% higher in 10-year-old trees than in control, while secondary nutrients such as calcium were recorded as maximum in 10- and 20-year-old trees. Micronutrients, including zinc and iron, followed a&#xa0;similar trend and were higher in younger trees, whereas copper content was highest in 30-year-old trees. Potassium and manganese content did not differ significantly among the age groups. Photosynthetic pigments such as chlorophyll&#xa0;‘a’ and&#xa0;‘b’ were significantly higher in 30-year-old trees, while the chlorophyll&#xa0;a:b ratio was highest in 20-year-old trees. Higher reducing sugars were recorded in 10-year-old trees, whereas non-reducing and total sugars were higher in 20-year-old trees on a&#xa0;fresh weight basis, while total sugars on a&#xa0;dry weight basis were highest in 10-year-old trees. Panicle fresh and dry weight and number of flowers per panicle were superior in younger trees, whereas total panicles and malformation percentage were higher in older trees. Fruit retention at advanced stages and at harvest was highest in 10-year-old trees. Although 30-year-old trees produced higher yield per tree, fruits from 10-year-old trees exhibited superior physico-chemical characteristics. The study indicates that ‘Amrapali’ trees above 20&#xa0;years of age require rejuvenation pruning to maintain fruit quality and productivity under high-density orchards.</p>

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Effect of Tree Age on Leaf Nutrient, Flowering, Physiological and Fruit-Related Traits in ‘Amrapali’ Mango (Mangifera indica L.) Under an Intensive Planting System

  • 期刊论文

  • 发表日期：

    2026年4月13日

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  • Harshit Kumar,
  • Manish Srivastav,
  • Gulshan Kumar,
  • Prabhanjan Rane,
  • Hansraj Meena,
  • Kanhaiya Singh,
  • A. Nagaraja,
  • Gopala Krishnan S.,
  • Rakesh Pandey,
  • Shruti Shethi,
  • V. K. Sharma

摘要

The present investigation was undertaken to evaluate the effect of tree age on leaf nutrient status, flowering behaviour, physiological traits, yield and fruit quality of ‘Amrapali’ mango (Mangifera indica L.) under an intensive planting system (4.5 × 4.5 m). Three age groups of trees, viz., 10, 20 and 30 years (control), were studied. Leaf nutrient analysis revealed that nitrogen content was higher in 10- and 20-year-old trees compared to 30-year-old trees. Phosphorus content was approximately 46% higher in 10-year-old trees than in control, while secondary nutrients such as calcium were recorded as maximum in 10- and 20-year-old trees. Micronutrients, including zinc and iron, followed a similar trend and were higher in younger trees, whereas copper content was highest in 30-year-old trees. Potassium and manganese content did not differ significantly among the age groups. Photosynthetic pigments such as chlorophyll ‘a’ and ‘b’ were significantly higher in 30-year-old trees, while the chlorophyll a:b ratio was highest in 20-year-old trees. Higher reducing sugars were recorded in 10-year-old trees, whereas non-reducing and total sugars were higher in 20-year-old trees on a fresh weight basis, while total sugars on a dry weight basis were highest in 10-year-old trees. Panicle fresh and dry weight and number of flowers per panicle were superior in younger trees, whereas total panicles and malformation percentage were higher in older trees. Fruit retention at advanced stages and at harvest was highest in 10-year-old trees. Although 30-year-old trees produced higher yield per tree, fruits from 10-year-old trees exhibited superior physico-chemical characteristics. The study indicates that ‘Amrapali’ trees above 20 years of age require rejuvenation pruning to maintain fruit quality and productivity under high-density orchards.