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<p>Drought is a significant contributor to diminished agricultural output, largely due to its detrimental effects on plant growth and physiology. The utilization of silicon (Si) has been identified as an efficacious strategy for the mitigation of the adverse effects associated with water stress in plants. The objective of this study was to evaluate the impact of a fertilizer derived from amorphous silica (ASF) applied to the soil during the first cycle, in ratoon sugarcane on growth variables, leaf water potential, and osmotic adjustment. Ratoon sugarcane plants were cultivated under two soil moisture levels (40% and 80% of the maximum water retention capacity (MWRC) and four ASF rates, corresponding to 0.0, 78.0, 117.0, and 156.0&#xa0;kg&#xa0;ha⁻<sup>1</sup> of Si, over a period of 150&#xa0;days after cutting. The growth variables, fresh mass production, water and osmotic potential, electrolyte leakage, relative water content, and leaf succulence were evaluated. The combination of an 80% MWRC of water regime with 156&#xa0;kg&#xa0;ha⁻<sup>1</sup> of Si resulted in increases in stalk height (+ 28%), stalk diameter (+ 6%), and leaf area (+ 126%) compared to the 40% MWRC. The application of 156&#xa0;kg&#xa0;ha⁻<sup>1</sup> of Si resulted in a 15% increase in water potential, 11% increase in osmotic potential, 15% increase in relative water content, and 14% increase in leaf succulence, and reduction of 54% in electrolyte leakage. The results demonstrated that the residual effect of Si increased growth, yield, relative water content, and water potential, in addition to reducing electrolyte leakage in ratoon sugarcane. These findings highlight the potential of Si as a tool for improving the yield in water-limited environments.</p>

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Silicon Mitigates the Effects of Water Deficit in Ratoon Sugarcane and Enhances Leaf Water Potential, Osmotic Adjustment, and Biomass Production

  • 期刊论文

  • 发表日期：

    2025年6月14日

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  • Steffany Daiana da Costa Berto,
  • Fabiano Simplicio Bezerra,
  • José Edson Florentino de Morais,
  • Lucas Yago de Carvalho Leal,
  • Martha Katharinne Silva Souza Paulino,
  • Cicero Aparecido Ferreira Araújo,
  • Wellinton Julio Ferreira Gonçalves,
  • Clístenes Williams Araújo do Nascimento,
  • Edivan Rodrigues de Souza

摘要

Drought is a significant contributor to diminished agricultural output, largely due to its detrimental effects on plant growth and physiology. The utilization of silicon (Si) has been identified as an efficacious strategy for the mitigation of the adverse effects associated with water stress in plants. The objective of this study was to evaluate the impact of a fertilizer derived from amorphous silica (ASF) applied to the soil during the first cycle, in ratoon sugarcane on growth variables, leaf water potential, and osmotic adjustment. Ratoon sugarcane plants were cultivated under two soil moisture levels (40% and 80% of the maximum water retention capacity (MWRC) and four ASF rates, corresponding to 0.0, 78.0, 117.0, and 156.0 kg ha⁻1 of Si, over a period of 150 days after cutting. The growth variables, fresh mass production, water and osmotic potential, electrolyte leakage, relative water content, and leaf succulence were evaluated. The combination of an 80% MWRC of water regime with 156 kg ha⁻1 of Si resulted in increases in stalk height (+ 28%), stalk diameter (+ 6%), and leaf area (+ 126%) compared to the 40% MWRC. The application of 156 kg ha⁻1 of Si resulted in a 15% increase in water potential, 11% increase in osmotic potential, 15% increase in relative water content, and 14% increase in leaf succulence, and reduction of 54% in electrolyte leakage. The results demonstrated that the residual effect of Si increased growth, yield, relative water content, and water potential, in addition to reducing electrolyte leakage in ratoon sugarcane. These findings highlight the potential of Si as a tool for improving the yield in water-limited environments.