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<p>The expediency of inorganic fertilizer supplementation attributed to the need for synchrony between nutrient requirement of plants and fish is a customary practice, while the utilization of organic fertilizers as a sustainable approach to amend aquaponics production remained largely unexplored. A 90-day trial investigated the feasibility of employing organic fertilizer extract as a supplement to aquaculture wastewater of <i>Channa striata</i>-lettuce aquaponics. Extracts of different organic fertilizers, viz., vermicompost (28.8&#xa0;mg/L), cow manure (50&#xa0;mg/L), chicken manure (50&#xa0;mg/L) and black soldier fly larvae frass (3.3&#xa0;mg/L) were applied weekly in T1, T2, T3 and T4, respectively and compared to control (C). The water quality varied within tolerable limits for cultured species for most parameters. The supplementation did not induce significant (<i>p</i> &gt; 0.05) changes in the growth performance of fish, while an alteration in normal physiological response was observed in T3 and T4. The antioxidant stress enzymes in the liver exhibited a significant difference in T3, while variation was insignificant in gill. Total lettuce yield (of all three harvests at 30-day interval) followed the order: T1 (1111.88 ± 4.90&#xa0;g) &gt; T2 (865.87 ± 4.95&#xa0;g) &gt; T4 (778.63 ± 5.34&#xa0;g) &gt; T3 (768.67 ± 3.30&#xa0;g) &gt; C(729.83 ± 7.18&#xa0;g). Proximate analysis revealed a significant increase in crude protein in T1 (1.59 ± 0.12%), and enrichment of nutrient content of lettuce leaves was perceived in treatments than control. The results indicated that all organic fertilizer extract supplementation performed optimally rendering improved production than control during the study, while vermicompost outperformed significantly in lettuce yield, proximate and mineral composition, and fish physiology, and hence recommended as best feasible for aquaponics.</p>

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Transforming waste to value: exploring potential of different organic fertilizer extracts as supplement mineral nutrients in aquaculture wastewater towards sustainable production of Channa striata (Bloch, 1793) and Lactuca sativa L. aquaponics

  • 期刊论文

  • 发表日期：

    2025年3月31日

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  • Venisza Cathy John,
  • Ajit Kumar Verma,
  • Kishore Kumar Krishnani,
  • Sukham Munilkumar,
  • Tincy Varghese,
  • Chandrakant Mallikarjun Hittinahalli,
  • Akhila S.

摘要

The expediency of inorganic fertilizer supplementation attributed to the need for synchrony between nutrient requirement of plants and fish is a customary practice, while the utilization of organic fertilizers as a sustainable approach to amend aquaponics production remained largely unexplored. A 90-day trial investigated the feasibility of employing organic fertilizer extract as a supplement to aquaculture wastewater of Channa striata-lettuce aquaponics. Extracts of different organic fertilizers, viz., vermicompost (28.8 mg/L), cow manure (50 mg/L), chicken manure (50 mg/L) and black soldier fly larvae frass (3.3 mg/L) were applied weekly in T1, T2, T3 and T4, respectively and compared to control (C). The water quality varied within tolerable limits for cultured species for most parameters. The supplementation did not induce significant (p > 0.05) changes in the growth performance of fish, while an alteration in normal physiological response was observed in T3 and T4. The antioxidant stress enzymes in the liver exhibited a significant difference in T3, while variation was insignificant in gill. Total lettuce yield (of all three harvests at 30-day interval) followed the order: T1 (1111.88 ± 4.90 g) > T2 (865.87 ± 4.95 g) > T4 (778.63 ± 5.34 g) > T3 (768.67 ± 3.30 g) > C(729.83 ± 7.18 g). Proximate analysis revealed a significant increase in crude protein in T1 (1.59 ± 0.12%), and enrichment of nutrient content of lettuce leaves was perceived in treatments than control. The results indicated that all organic fertilizer extract supplementation performed optimally rendering improved production than control during the study, while vermicompost outperformed significantly in lettuce yield, proximate and mineral composition, and fish physiology, and hence recommended as best feasible for aquaponics.