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<p>The red alga <i>Gelidium corneum</i>, which is widely used worldwide due to the growing demand for bacteriological and food agar, generates large quantities of solid waste that remain underutilized despite its economic potential. This study aimed to assess the potential of <i>G. corneum</i> residue as an eco-friendly organic fertilizer for tomatoes. A phytotoxicity test on lettuce was conducted in the laboratory, and the fertilizing effect of the residue was assessed in a greenhouse on tomato plants. Macroelements, microelements, organic matter, and some potentially toxic elements (PTEs) were assessed after the tomato harvest. The results showed that the residue had no phytotoxic effects on lettuce seeds. Soil fertilization with <i>G. corneum</i> residue significantly increased the fresh weight of tomato fruits, especially at a dose of 3.73 t/ha. Residue application also enhanced soil levels of organic matter, nitrogen, and calcium, while moderately increasing micronutrients such as iron, copper, and zinc. Potentially toxic elements (PTEs), including arsenic and lead, remained below detection limits (&lt; 1 ppb) following the tomato harvest. Consequently, soil fertility was improved without negative effects. This research suggests that <i>G. corneum</i> residue, rich in organic and inorganic elements and free of some analyzed PTEs, can be used as a sustainable fertilizer for tomatoes. These residues may enhance soil quality and mineral status and can be safely used in organic farming.</p>

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Eco-friendly fertilizer potential of Gelidium corneum residue for organic agriculture

  • 期刊论文

  • 发表日期：

    2025年5月29日

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  • Hajare Errati,
  • Salim Lebbar,
  • Lahoucine Hilali,
  • Lamyaa Zelmat,
  • Rachid Aboutayeb,
  • Rania Brital,
  • Bouchaib Bencharki,
  • Khadija Dari,
  • Sanae Krimi Bencheqroun

摘要

The red alga Gelidium corneum, which is widely used worldwide due to the growing demand for bacteriological and food agar, generates large quantities of solid waste that remain underutilized despite its economic potential. This study aimed to assess the potential of G. corneum residue as an eco-friendly organic fertilizer for tomatoes. A phytotoxicity test on lettuce was conducted in the laboratory, and the fertilizing effect of the residue was assessed in a greenhouse on tomato plants. Macroelements, microelements, organic matter, and some potentially toxic elements (PTEs) were assessed after the tomato harvest. The results showed that the residue had no phytotoxic effects on lettuce seeds. Soil fertilization with G. corneum residue significantly increased the fresh weight of tomato fruits, especially at a dose of 3.73 t/ha. Residue application also enhanced soil levels of organic matter, nitrogen, and calcium, while moderately increasing micronutrients such as iron, copper, and zinc. Potentially toxic elements (PTEs), including arsenic and lead, remained below detection limits (< 1 ppb) following the tomato harvest. Consequently, soil fertility was improved without negative effects. This research suggests that G. corneum residue, rich in organic and inorganic elements and free of some analyzed PTEs, can be used as a sustainable fertilizer for tomatoes. These residues may enhance soil quality and mineral status and can be safely used in organic farming.