organic-growing

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Optimisation of seaweed-based biostimulant application to improve bell pepper yield and quality using Topsis-Shannon entropy.

PubMed · 2026-06-04

Applying a seaweed extract at the right concentration and timing more than doubled bell pepper yields and boosted fruit nutrition — without any synthetic fertilizers.

Yield more than doubled from 2.01 to 4.43 kg per square meter using 0.4% seaweed extract applied at three growth stages.

Fruit sweetness-to-acidity ratio improved by 47% (1.85 vs. 1.26), and total phenolic (antioxidant) content rose from 173 to 238.9 mg per 100g fresh weight.

Timing mattered as much as concentration — combining applications at 14 days after transplanting, fruit set, and 14 days before harvest outperformed any single application or other combination.

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