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<p>This study compared the growth of <i>Limnospira platensis</i> in a conventional fertilizer-based system and an integrated aquaponics system over 30&#xa0;days. The conventional system produced more biomass (2.12&#xa0;g L⁻<sup>1</sup>) but showed nutrient instability and salt buildup. The aquaponics system yielded slightly less biomass (1.62&#xa0;g L⁻<sup>1</sup>) but maintained more stable conditions, with near-neutral pH, steady conductivity, and higher dissolved oxygen (7.6–8.7&#xa0;mg L⁻<sup>1</sup>). It also removed nutrients more effectively, reducing ammonium by 54–61% and nitrate by 32–55%. Biochemically, aquaponic biomass had slightly less protein (53.6% vs. 60.3%) and similar lipid content (9.85% vs. 10.0%), but was richer in antioxidants, with 33% more total phenolics and a 19-fold increase in auxin. These results show that aquaponics can sustainably produce <i>L. platensis</i> with improved functional and antioxidant properties, even if the overall biomass yield is lower.</p>

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Aquaponics promotes sustainable Limnospira platensis cultivation via enhanced nutrient stability, antioxidant enrichment, and phytohormonal adaptation

  • 期刊论文

  • 发表日期：

    2026年4月14日

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  • Ichrak Essid,
  • Martina Ciardi,
  • Francisco Gabriel Acien Fernandez,
  • Cintia Gomez,
  • Wided Ben Ammar,
  • Chiraz Chaffei-Haouari

摘要

This study compared the growth of Limnospira platensis in a conventional fertilizer-based system and an integrated aquaponics system over 30 days. The conventional system produced more biomass (2.12 g L⁻1) but showed nutrient instability and salt buildup. The aquaponics system yielded slightly less biomass (1.62 g L⁻1) but maintained more stable conditions, with near-neutral pH, steady conductivity, and higher dissolved oxygen (7.6–8.7 mg L⁻1). It also removed nutrients more effectively, reducing ammonium by 54–61% and nitrate by 32–55%. Biochemically, aquaponic biomass had slightly less protein (53.6% vs. 60.3%) and similar lipid content (9.85% vs. 10.0%), but was richer in antioxidants, with 33% more total phenolics and a 19-fold increase in auxin. These results show that aquaponics can sustainably produce L. platensis with improved functional and antioxidant properties, even if the overall biomass yield is lower.