December 4, 2025ForestsOpen Access

Biostimulation Effect of the Seaweed Extract (Ecklonia maxima Osbeck) and Plant Growth Promoting Bacteria (Bacillus subtilis Ehrenberg) on the Growth of the European Beech (Fagus sylvatica L.) Seedlings

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Experiments showed enhanced growth in beech seedlings with bioactive compounds, indicating efficient plant growth promoting strategies.

Growth of beech seedlings improved through biostimulation with seaweed extract and Bacillus subtilis, leading to better root system development.
Application of Bacillus subtilis increased the Dickson Quality Index (22.9 ± 3.4 cm, 6.00 ± 0.4 mm) relative to control conditions for seedlings.
Observational research evaluated multiple doses of seaweed extract and bacteria on European beech seedlings' root and health indices.
Findings highlight the potential for sustainable production practices in forestry by utilizing biological growth promoters.

Krupa et al. (2025) studied this question.

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