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<p>Conventional fertilizers suffer from significant nutrient loss, resulting in low nutrient use efficiency, soil and water pollution, and greenhouse gas (GHG) emissions. Nano-fertilizers (NFs) have the potential to reduce crop production costs, improve nutrient release mechanisms, and reduce GHG emissions. In the present work, hybrid NFs, a hydroxyapatite (HA) template decorated with nano-urea (NU), were synthesized via a cost-effective, green wet-chemistry approach using oyster shells. SEM, FTIR, water absorption capacity&#xa0;(WAC), and swelling ratios (SRs) were used to analyze the effect of different calcination times and NU:HA ratios on the morphology of hybrid NFs. A comparative analysis was conducted through column-leaching experiments to evaluate the nutrient leaching from the NFs, conventional fertilizers, and the control. A reduction in nutrient leaching was observed from the hybrid NFs compared to the conventional fertilizers, indicating that the hybrid NFs could enhance nutrient retention in the soil, improve plant nutrient uptake, and reduce environmental pollution.</p> Graphical abstract <p></p>

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Marine waste-assisted hybrid nano-fertilizers for controlled nutrient release

  • 期刊论文

  • 发表日期：

    2025年8月19日

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  • Muhammad Jahandad Khan,
  • Manmeet Kaur Chhina,
  • Subhiksha Jayakumar,
  • Khalil I. Al-Murghrabi,
  • Kuljeet Singh Grewal,
  • Gurpreet Singh Selopal

摘要

Conventional fertilizers suffer from significant nutrient loss, resulting in low nutrient use efficiency, soil and water pollution, and greenhouse gas (GHG) emissions. Nano-fertilizers (NFs) have the potential to reduce crop production costs, improve nutrient release mechanisms, and reduce GHG emissions. In the present work, hybrid NFs, a hydroxyapatite (HA) template decorated with nano-urea (NU), were synthesized via a cost-effective, green wet-chemistry approach using oyster shells. SEM, FTIR, water absorption capacity (WAC), and swelling ratios (SRs) were used to analyze the effect of different calcination times and NU:HA ratios on the morphology of hybrid NFs. A comparative analysis was conducted through column-leaching experiments to evaluate the nutrient leaching from the NFs, conventional fertilizers, and the control. A reduction in nutrient leaching was observed from the hybrid NFs compared to the conventional fertilizers, indicating that the hybrid NFs could enhance nutrient retention in the soil, improve plant nutrient uptake, and reduce environmental pollution.

Graphical abstract