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<p>An investigation was conducted in a mango (cv. Langra) orchard under subtropical humid condition of eastern India to assess the effects of integrated nutrient management (INM) on litter dynamics, nutrient recycling, and greenhouse gas emissions. Ten treatments involving varying combinations of inorganic fertilizers, organics, biofertilizers, and foliar nutrients were applied. Leaf litter was monitored for biomass and nutrient content. Soil samples were collected for carbon stock estimation, while fruit yield and quality were analysed after harvesting. Potential CO<sub>2</sub> and N<sub>2</sub>O emissions were calculated from litter-derived nutrients using established models. The findings on annual leaf litter suggest an enhanced leaf litter fall of 10.28&#xa0;Mg&#xa0;ha⁻<sup>1</sup> under treatments applied with 50% recommended dose of fertilizer (RDF) with farm yard manure and vermicompost. This integrated strategy not only outperformed the standard RDF by over 41% but also surpassed the foliar micronutrient application, reinforcing the synergistic effect of combining organics with chemical inputs. Long-term integrated nutrient management modules significantly influenced leaf litter nutrient composition and recycling efficiency. Treatments integrating organics enhanced carbon, nitrogen, phosphorus, and potassium return, and also increased carbon dioxide and nitrous oxide emissions, revealing a trade-off between nutrient cycling and greenhouse gas fluxes. INM significantly improved soil carbon stock, strongly correlating with surface total organic carbon (R<sup>2</sup> = 0.9519), suggesting its potential to support “4 per mille” goals in mango orchards. In addition, INM significantly improved fruit number (4.63–28.09% increase over 100% RDF), weight, and total yield (12.03–55.42% increase over 100% RDF); and also enhancing fruit quality traits including TSS, sugar, ascorbic acid, carotenoids, phenols, and reducing titratable acidity of mango fruits.</p>

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Integrated nutrient management enhances leaf litter, mango yield, quality and carbon stock

  • 期刊论文

  • 发表日期：

    2025年8月5日

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  • Kumar Harsh,
  • Manoj Kundu,
  • Anupam Das,
  • Sanjay Sahay,
  • Samik Sengupta,
  • Rajiv Rakshit

摘要

An investigation was conducted in a mango (cv. Langra) orchard under subtropical humid condition of eastern India to assess the effects of integrated nutrient management (INM) on litter dynamics, nutrient recycling, and greenhouse gas emissions. Ten treatments involving varying combinations of inorganic fertilizers, organics, biofertilizers, and foliar nutrients were applied. Leaf litter was monitored for biomass and nutrient content. Soil samples were collected for carbon stock estimation, while fruit yield and quality were analysed after harvesting. Potential CO2 and N2O emissions were calculated from litter-derived nutrients using established models. The findings on annual leaf litter suggest an enhanced leaf litter fall of 10.28 Mg ha⁻1 under treatments applied with 50% recommended dose of fertilizer (RDF) with farm yard manure and vermicompost. This integrated strategy not only outperformed the standard RDF by over 41% but also surpassed the foliar micronutrient application, reinforcing the synergistic effect of combining organics with chemical inputs. Long-term integrated nutrient management modules significantly influenced leaf litter nutrient composition and recycling efficiency. Treatments integrating organics enhanced carbon, nitrogen, phosphorus, and potassium return, and also increased carbon dioxide and nitrous oxide emissions, revealing a trade-off between nutrient cycling and greenhouse gas fluxes. INM significantly improved soil carbon stock, strongly correlating with surface total organic carbon (R2 = 0.9519), suggesting its potential to support “4 per mille” goals in mango orchards. In addition, INM significantly improved fruit number (4.63–28.09% increase over 100% RDF), weight, and total yield (12.03–55.42% increase over 100% RDF); and also enhancing fruit quality traits including TSS, sugar, ascorbic acid, carotenoids, phenols, and reducing titratable acidity of mango fruits.