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<p>This study evaluated the effects of foliar application of an <i>Ascophyllum nodosum</i>-based organomineral biostimulant on soybean (<i>Glycine max</i>) physiology and yield under both greenhouse and field conditions. The research aimed to examine physiological and biochemical responses associated with biostimulant use, particularly under water-limited conditions. In greenhouse trials, photosynthetic pigments and antioxidant enzyme activities (CAT, POX, SOD) were measured at two time points, including a period of water-limited conditions. In the field, the biostimulant was applied at the V4 stage, and redox enzyme activities and grain yield were monitored. Leaf nutrient content (P, K, Ca, Mg, Mn, Zn, Cu, and Ni) was analyzed <i>via</i> ICP-OES. Biostimulant application was associated with higher photosynthetic pigment concentrations (total chlorophyll + 60% at 7 days) and increased antioxidant enzyme activities (CAT + 17.3%, POX + 47.4%, SOD + 33.9% during water-limited conditions), suggesting enhanced oxidative stress tolerance. Foliar nutrient analysis revealed selective modulation, with increases in Ca, Mn, Ni, and Zn. Field trials showed an associated 10.2% increase in grain yield (3387.0&#xa0;kg ha<sup>−1</sup> vs. 3073.6&#xa0;kg ha<sup>−1</sup> in control plants). Overall, these findings indicate that the <i>A. nodosum</i>-based biostimulant is linked to improved soybean resilience and productivity through functional associations with redox activity and nutrient status, highlighting its potential as a sustainable tool for enhancing crop performance.</p>

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Enhancing soybean yield with an Ascophyllum-based foliar biostimulant: combined greenhouse and field insights into nutrient and antioxidant response

  • 期刊论文

  • 发表日期：

    2026年5月9日

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  • Carolina Fedrigo Coneglian,
  • Maria Eduarda de Souza Rocha,
  • Gabriela Bissoli Silva,
  • Patricia Viero,
  • Luana Thais Varize Marcusso,
  • Natieli Jenifer Mateus Corniani,
  • Carlos Augusto Corniani da Silva,
  • Willian Martire Marcusso,
  • João Arthur dos Santos Oliveira

摘要

This study evaluated the effects of foliar application of an Ascophyllum nodosum-based organomineral biostimulant on soybean (Glycine max) physiology and yield under both greenhouse and field conditions. The research aimed to examine physiological and biochemical responses associated with biostimulant use, particularly under water-limited conditions. In greenhouse trials, photosynthetic pigments and antioxidant enzyme activities (CAT, POX, SOD) were measured at two time points, including a period of water-limited conditions. In the field, the biostimulant was applied at the V4 stage, and redox enzyme activities and grain yield were monitored. Leaf nutrient content (P, K, Ca, Mg, Mn, Zn, Cu, and Ni) was analyzed via ICP-OES. Biostimulant application was associated with higher photosynthetic pigment concentrations (total chlorophyll + 60% at 7 days) and increased antioxidant enzyme activities (CAT + 17.3%, POX + 47.4%, SOD + 33.9% during water-limited conditions), suggesting enhanced oxidative stress tolerance. Foliar nutrient analysis revealed selective modulation, with increases in Ca, Mn, Ni, and Zn. Field trials showed an associated 10.2% increase in grain yield (3387.0 kg ha−1 vs. 3073.6 kg ha−1 in control plants). Overall, these findings indicate that the A. nodosum-based biostimulant is linked to improved soybean resilience and productivity through functional associations with redox activity and nutrient status, highlighting its potential as a sustainable tool for enhancing crop performance.