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<p>Phytolith-occluded carbon (PhytOC) represents a major pathway for carbon sequestration of vegetation, while <i>Suaeda salsa</i> is widely distributed in salt marshes, which are components of the blue carbon ecosystem. Silicon fertilizer (SiF) promotes phytolith formation and improves the bioavailability of nitrogen, phosphorus, and potassium in plant ash (PA); PA improves soil properties and increases the bioavailability of silicon. Thus, it is speculated that a rational coapplication of SiF and PA enhances the PhytOC production of <i>S. salsa</i>. To test this hypothesis, pot experiments were conducted. The highest <i>S. salsa</i> biomass increased by 184.86% occurred as the contents of SiF and PA were 22.5 and 5.0&#xa0;g/kg, respectively. The phytolith contents were affected by SiF and PA; the percentage content of carbon in phytoliths was influenced by SiF, PA, and their interaction; the maximum PhytOC production achieved with the coapplication of SiF and PA (15.0 and 10.0&#xa0;g/kg, respectively), which was promoted by 521.41%. Thus, the rational SiF–PA coapplication enhances not only the carbon sequestration potential via phytoliths but also the <i>S. salsa</i> restoration.</p>

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Effects of the Coapplication of Silicon Fertilizer and Plant Ash on the Phytolith-occluded Carbon Sequestration Potential of Suaeda salsa

  • 期刊论文

  • 发表日期：

    2025年5月30日

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  • Zhang Li,
  • Liu Lele,
  • Zhang Jing,
  • Guo Cuilian,
  • Wang Fang,
  • Ge Changzi

摘要

Phytolith-occluded carbon (PhytOC) represents a major pathway for carbon sequestration of vegetation, while Suaeda salsa is widely distributed in salt marshes, which are components of the blue carbon ecosystem. Silicon fertilizer (SiF) promotes phytolith formation and improves the bioavailability of nitrogen, phosphorus, and potassium in plant ash (PA); PA improves soil properties and increases the bioavailability of silicon. Thus, it is speculated that a rational coapplication of SiF and PA enhances the PhytOC production of S. salsa. To test this hypothesis, pot experiments were conducted. The highest S. salsa biomass increased by 184.86% occurred as the contents of SiF and PA were 22.5 and 5.0 g/kg, respectively. The phytolith contents were affected by SiF and PA; the percentage content of carbon in phytoliths was influenced by SiF, PA, and their interaction; the maximum PhytOC production achieved with the coapplication of SiF and PA (15.0 and 10.0 g/kg, respectively), which was promoted by 521.41%. Thus, the rational SiF–PA coapplication enhances not only the carbon sequestration potential via phytoliths but also the S. salsa restoration.