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<p>This study aimed to assess the potential of the growing media biochar, green-compost, and mushroom-compost as peat-alternative for the sustainable clonal cultivation of inerm caper. The research focused on evaluating their effects on plant establishment, growth performance, leaf mineral composition, and secondary metabolites accumulation. Different proportions (from 25% to 100%) of biochar, green-compost, and mushroom-compost with peat were tested as rooting substrates. Regeneration rates, growth parameters, survival rates, and leaf nutrient contents were measured. Total polyphenols, flavonoids, and flavonols were quantified spectrophotometrically. Biochar-based substrates exhibited high porosity (up to 89.87%) and were rich in essential macronutrients, while mushroom-compost provided higher water retention (3.61&#xa0;g/g) and nitrogen content (22.60&#xa0;g/kg DW). Survival rates reached 100% in substrates containing biochar at 25%, 75%, or 100%; mushroom compost at 75% or 100%; and green compost at 100%. Fresh plant biomass, and fresh weight of leaves and stems, were significantly enhanced in mushroom-compost-75%, whereas green-compost-50% promoted root elongation. Mushroom-compost substrates enhanced potassium and phosphorus leaf content, while green-compost-25% yielded the highest nitrogen levels (27.88&#xa0;g/kg). The highest calcium contents were detected with biochar-25%, green-compost-25% and mushroom-compost-25% substrates. Secondary metabolite accumulation was enhanced compared to peat, with the most used combinations leading to increased contents of total polyphenols, flavonoids, and flavonols. Our findings highlight the potential of the sustainable substrate combinations to enhance growth, nutrient uptake, and bioactive compound accumulation in inerm caper, compared to peat. These results underscore their potential as viable alternatives, reducing reliance on peat and promoting environmentally sustainable cultivation practices.</p>

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Potential of Biochar, Green-Compost, and Mushroom-Compost as Peat Alternatives Substrates for the Sustainable Clonal-Propagation of Inerm Caper

  • 期刊论文

  • 发表日期：

    2025年10月27日

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  • Awatef Rhimi,
  • Leila Riahi,
  • Neila Jellouli,
  • Sonia Hjaoujia,
  • Saloua Ouerghemmi,
  • Mohsen Trabelsi,
  • Mohamed Boussaid,
  • Chokri Messaoud,
  • Giancarlo Fascella

摘要

This study aimed to assess the potential of the growing media biochar, green-compost, and mushroom-compost as peat-alternative for the sustainable clonal cultivation of inerm caper. The research focused on evaluating their effects on plant establishment, growth performance, leaf mineral composition, and secondary metabolites accumulation. Different proportions (from 25% to 100%) of biochar, green-compost, and mushroom-compost with peat were tested as rooting substrates. Regeneration rates, growth parameters, survival rates, and leaf nutrient contents were measured. Total polyphenols, flavonoids, and flavonols were quantified spectrophotometrically. Biochar-based substrates exhibited high porosity (up to 89.87%) and were rich in essential macronutrients, while mushroom-compost provided higher water retention (3.61 g/g) and nitrogen content (22.60 g/kg DW). Survival rates reached 100% in substrates containing biochar at 25%, 75%, or 100%; mushroom compost at 75% or 100%; and green compost at 100%. Fresh plant biomass, and fresh weight of leaves and stems, were significantly enhanced in mushroom-compost-75%, whereas green-compost-50% promoted root elongation. Mushroom-compost substrates enhanced potassium and phosphorus leaf content, while green-compost-25% yielded the highest nitrogen levels (27.88 g/kg). The highest calcium contents were detected with biochar-25%, green-compost-25% and mushroom-compost-25% substrates. Secondary metabolite accumulation was enhanced compared to peat, with the most used combinations leading to increased contents of total polyphenols, flavonoids, and flavonols. Our findings highlight the potential of the sustainable substrate combinations to enhance growth, nutrient uptake, and bioactive compound accumulation in inerm caper, compared to peat. These results underscore their potential as viable alternatives, reducing reliance on peat and promoting environmentally sustainable cultivation practices.