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August 27, 2026Chilean journal of agricultural researchOpen Access

Silicon-induced leaf structural reinforcement modulates growth, foliar disease and yield performance of rice under nutrient-limited conditions

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Authors

APArlyna Budi PustikaLBLesty Ayu BidhariMSMochammad Arif Subechan

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Overview

Randomized block experiment demonstrates that silicon supplementation reinforces leaf anatomy and reduces foliar disease in rice, highlighting its ability to offset nutrient limitations.

Key Points

  • To assess whether silicon supplementation reinforces leaf anatomical structure, improves nutrient uptake, enhances foliar disease resistance, and sustains grain yield in rice under nutrient-limited conditions.
  • Evaluated four fertilization treatments (conventional NPK with and without supplementary silicon) in rice (Oryza sativa L.) using a randomized complete block design.
  • Assessed leaf anatomical traits (cuticle and mesophyll thickness, stomatal density), chlorophyll levels, nutrient accumulation, foliar disease progression (AUDPC), and grain yield across phenological stages.
  • Silicon supplementation altered Mg (194.8 mg kg⁻¹ DW) and Zn (82.9 mg kg⁻¹) accumulation without reducing P and K uptake, while increasing cuticle thickness (18.3 μm), mesophyll thickness (256.2 μm), stomatal density (473.9 stomata mm⁻²), and chlorophyll content (15.4 SPAD index).
  • Silicon accumulation reduced AUDPC values for bacterial red stripe from 771.1 to 159.1 %-days, leaf blight from 119.9 to 9.9 %-days, and narrow brown spot from 786.1 to 452.1 %-days, while maintaining grain yield across treatments at 6.15–6.24 t ha⁻¹.

Cite This Study

Pustika et al. (2026) studied this question.

synapsesocial.com/papers/6a8fe9ad10c91c1e9262177fhttps://doi.org/10.4067/s0718-58392026000500708
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