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<p>Maximizing the yield and quality of pea plants through environmentally friendly ways is highly valued in sustainable agriculture. This study aimed to evaluate the potential of the cyanobacterial strain <i>Trichormus variabilis</i> FMG (OP730954) as a biofertilizer, both alone and in combination with mineral soil amendments (Feldspar and Zeolite), to enhance the growth, yield, and nutritional quality of pea plants (<i>Pisum sativum</i>) in sandy and clay soils across two consecutive winter seasons. <i>T</i>. <i>variabilis</i> was characterized morphologically, confirming the presence of N₂-fixing heterocysts, and physiologically, showing significant chlorophyll a (24.75&#xa0;µg mL⁻¹), indole-3-acetic acid (IAA) production (22.30&#xa0;µg mL⁻¹), and phosphate solubilization activity. A field experiment was conducted to test the synergy between the bio-inoculant and mineral amendments (F and Z). The results indicated that the combined treatment (<i>T</i>. <i>variabilis</i> + F) consistently yielded the highest growth parameters, reaching a maximum plant height of 77.30&#xa0;cm and a dry weight of 51.60&#xa0;g in clay soil. In sandy soil, the same treatment achieved a 2-fold increase in biomass compared to the control. Yield components, including pod number, seed weight, and nutritional quality (protein up to 30.8%), were significantly enhanced. Furthermore, soil biological activity was improved, as evidenced by a marked increase in dehydrogenase (DHA) activity (up to 1.56 and 2.90&#xa0;mg TPF g⁻¹ day⁻¹in sandy and clay soil, respectively) and improved NPK availability in the rhizosphere. The integration of <i>T</i>. <i>variabilis</i> with mineral amendments, particularly Feldspar, serves as a highly effective and sustainable strategy for improving legume productivity and soil fertility. This synergistic approach offers a viable bio-technological alternative to synthetic fertilizers in both clay and sandy soils.</p>

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Integrating bio-mineral fertilizers (Trichormus variabilis, Feldspar, and Zeolite) for enhancing sustainable pea cultivation in sandy and clay soils

  • 期刊论文

  • 发表日期：

    2026年6月17日

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  • Mona F. Ghazal,
  • Naeem M.E. Doha,
  • Walaa H. Ismael,
  • Ahmed M. El-Sawah,
  • Aya Ahmed Nader,
  • Gehan M. Salem

摘要

Maximizing the yield and quality of pea plants through environmentally friendly ways is highly valued in sustainable agriculture. This study aimed to evaluate the potential of the cyanobacterial strain Trichormus variabilis FMG (OP730954) as a biofertilizer, both alone and in combination with mineral soil amendments (Feldspar and Zeolite), to enhance the growth, yield, and nutritional quality of pea plants (Pisum sativum) in sandy and clay soils across two consecutive winter seasons. T. variabilis was characterized morphologically, confirming the presence of N₂-fixing heterocysts, and physiologically, showing significant chlorophyll a (24.75 µg mL⁻¹), indole-3-acetic acid (IAA) production (22.30 µg mL⁻¹), and phosphate solubilization activity. A field experiment was conducted to test the synergy between the bio-inoculant and mineral amendments (F and Z). The results indicated that the combined treatment (T. variabilis + F) consistently yielded the highest growth parameters, reaching a maximum plant height of 77.30 cm and a dry weight of 51.60 g in clay soil. In sandy soil, the same treatment achieved a 2-fold increase in biomass compared to the control. Yield components, including pod number, seed weight, and nutritional quality (protein up to 30.8%), were significantly enhanced. Furthermore, soil biological activity was improved, as evidenced by a marked increase in dehydrogenase (DHA) activity (up to 1.56 and 2.90 mg TPF g⁻¹ day⁻¹in sandy and clay soil, respectively) and improved NPK availability in the rhizosphere. The integration of T. variabilis with mineral amendments, particularly Feldspar, serves as a highly effective and sustainable strategy for improving legume productivity and soil fertility. This synergistic approach offers a viable bio-technological alternative to synthetic fertilizers in both clay and sandy soils.