Scholarlink

<p>The excessive use of synthetic agrochemicals poses serious risks to human health and soil ecology, necessitating sustainable alternatives. Seaweed extracts can function as natural biostimulants with proven benefits for plant growth and productivity. However, the use of aqueous homogenates of seaweeds remains underexplored. This study evaluated, for the first time, the impact of <i>Solieria chordalis</i> (C. Agardh) J. Agardh extract on <i>Tagetes minuta</i> L. (aromatic marigold) in the Western Himalayas using a factorial randomized block design with two application methods (foliar spray and drenching) and five concentrations (0.0–6.0 mL L⁻<sup>1</sup>) over two years (2023–2024). Foliar application significantly outperformed drenching in enhancing plant height (up to 175.73 cm), branch number, photosynthetic rate (32.38 µmol m⁻<sup>2</sup> s⁻<sup>1</sup>), and biomass yield (up to 15.5 t ha⁻<sup>1</sup>). The highest essential oil yield (99.90 kg ha⁻<sup>1</sup>) and content (0.70%) were achieved with 4.5 mL L⁻<sup>1</sup> foliar application over the control. GC-MS profiling revealed seven major oil constituents, with <i>(Z)-β-</i>ocimene (28.98–38.08%) and dihydro tagetone (19.55–24.77%) as dominant. Treatment significantly influenced composition; foliar application favored <i>(Z)-β-</i>ocimene and (<i>Z</i>)-tagetone, while drenching enhanced (<i>E</i>)-tagetone and (<i>E</i>)-ocimenone. Hierarchical clustering and correlation analysis showed strong associations between growth traits, essential oil yield, and constituent profiles. PCA identified foliar spray at 4.5 mL L⁻<sup>1</sup> (A1C4) as the most effective treatment. The finding of current study confirms the efficacy of <i>S. chordalis</i> extract as a sustainable biostimulant, enhancing both yield and quality in aromatic marigold cultivation, and support its broader adoption in environmentally responsible agriculture.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Harnessing the power of red algae: Optimized application of Solieria chordalis-derived biostimulants boosting Tagetes minuta L. growth and essential oil in acidic soils

  • 期刊论文

  • 发表日期：

    2026年6月15日

查看全文
  • Nidhi Negi,
  • Sumedha Thakur,
  • Swati Dhiman,
  • Swati Walia,
  • Arup Ghosh,
  • Rakesh Kumar

摘要

The excessive use of synthetic agrochemicals poses serious risks to human health and soil ecology, necessitating sustainable alternatives. Seaweed extracts can function as natural biostimulants with proven benefits for plant growth and productivity. However, the use of aqueous homogenates of seaweeds remains underexplored. This study evaluated, for the first time, the impact of Solieria chordalis (C. Agardh) J. Agardh extract on Tagetes minuta L. (aromatic marigold) in the Western Himalayas using a factorial randomized block design with two application methods (foliar spray and drenching) and five concentrations (0.0–6.0 mL L⁻1) over two years (2023–2024). Foliar application significantly outperformed drenching in enhancing plant height (up to 175.73 cm), branch number, photosynthetic rate (32.38 µmol m⁻2 s⁻1), and biomass yield (up to 15.5 t ha⁻1). The highest essential oil yield (99.90 kg ha⁻1) and content (0.70%) were achieved with 4.5 mL L⁻1 foliar application over the control. GC-MS profiling revealed seven major oil constituents, with (Z)-β-ocimene (28.98–38.08%) and dihydro tagetone (19.55–24.77%) as dominant. Treatment significantly influenced composition; foliar application favored (Z)-β-ocimene and (Z)-tagetone, while drenching enhanced (E)-tagetone and (E)-ocimenone. Hierarchical clustering and correlation analysis showed strong associations between growth traits, essential oil yield, and constituent profiles. PCA identified foliar spray at 4.5 mL L⁻1 (A1C4) as the most effective treatment. The finding of current study confirms the efficacy of S. chordalis extract as a sustainable biostimulant, enhancing both yield and quality in aromatic marigold cultivation, and support its broader adoption in environmentally responsible agriculture.