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<p>Organic rice cultivation relies on natural inputs for crop growth and protection. Natural silica offers a solution for managing the pest population and also enhances the plant growth, in addition to natural enemies’ attraction. Field experiments were conducted over two seasons with sole and combined application of natural silicon granules in soil (25&#xa0;kg/acre) and dust spraying (1%) at 15, 30 and 45&#xa0;days after transplanting (DAT) to manage yellow stem borer populations. Combined application of silicon granules along with dust at 15, 30 and 45 DAT (SA3/FA) significantly enhanced the total phenols (0.34&#xa0;g pyrocatechol equivalents/100&#xa0;g), peroxidase (0.54 ΔA/min/g), polyphenol oxidase (0.20 ΔA/min/g) and Phenylalanine ammonia lyase (0.87 ΔA/min/g). Silicon deposition in plant tissues also caused abrasions in the mandibles of YSB larvae and increased natural enemies (<i>Telenomus</i> sp., <i>Trichogramma sp</i>., dragonflies, damselflies and spiders) by 60–86.36% in winter and 40.21–81.57% in summer. These direct and indirect defense mechanisms worked together and resulted in 82.34% and 82.37% reduction in YSB damage for both the seasons. The study highlights that SA3/FA treatment effectively managed YSB and increased grain yield by 39.75% in winter and 42.50% in summer under organic rice production.</p>

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Exogenous Application of Natural Silicon in Organic Rice: Dual Role as a Plant Protector and Crop Booster

  • 期刊论文

  • 发表日期：

    2025年11月29日

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  • Sowmiya Arumugam,
  • Suganthy Mariappan,
  • G Guru Pirasanna Pandi,
  • Djanaguiraman Maduraimuthu,
  • Anchana Kandasamy,
  • Sheela Venugopal,
  • Manonmani S,
  • Senthil Kumar G,
  • Uma D

摘要

Organic rice cultivation relies on natural inputs for crop growth and protection. Natural silica offers a solution for managing the pest population and also enhances the plant growth, in addition to natural enemies’ attraction. Field experiments were conducted over two seasons with sole and combined application of natural silicon granules in soil (25 kg/acre) and dust spraying (1%) at 15, 30 and 45 days after transplanting (DAT) to manage yellow stem borer populations. Combined application of silicon granules along with dust at 15, 30 and 45 DAT (SA3/FA) significantly enhanced the total phenols (0.34 g pyrocatechol equivalents/100 g), peroxidase (0.54 ΔA/min/g), polyphenol oxidase (0.20 ΔA/min/g) and Phenylalanine ammonia lyase (0.87 ΔA/min/g). Silicon deposition in plant tissues also caused abrasions in the mandibles of YSB larvae and increased natural enemies (Telenomus sp., Trichogramma sp., dragonflies, damselflies and spiders) by 60–86.36% in winter and 40.21–81.57% in summer. These direct and indirect defense mechanisms worked together and resulted in 82.34% and 82.37% reduction in YSB damage for both the seasons. The study highlights that SA3/FA treatment effectively managed YSB and increased grain yield by 39.75% in winter and 42.50% in summer under organic rice production.