Fulvic acid improves morphophysiological traits and vase life in Alstroemeria ‘Orange Queen’ in soilless conditions
2025
Fereshteh Sahraie | Zohreh Jabbarzadeh | Jafar Amiri
The application of fulvic acid as a biostimulant was investigated for its effects on flowering indices, biochemical traits, and vase life of Alstroemeria ‘Orange Queen’. Conducted in a controlled greenhouse setting, the study employed fulvic acid concentrations of 50, 100, and 200 mg l⁻¹ as drench. Results demonstrated significant improvements in various flowering parameters. Notably, the 100 mg l⁻¹ concentration increased bud diameter and length, and enhanced floret fresh and dry weight compared to the control. Additionally, this concentration significantly elevated chlorophyll a, b, and total chlorophyll contents, as well as carotenoid and anthocyanin levels, thus improving photosynthetic efficiency and flower pigmentation. Soluble sugars in leaves and petals also increased with fulvic acid application, particularly at 100 mg L⁻¹, indicating enhanced carbohydrate accumulation. Furthermore, fulvic acid treatment prolonged the vase life of cut flowers, with the 100 mg l⁻¹ concentration achieving the most substantial extension. The observed improvements in growth, pigment content, and flower longevity suggest that fulvic acid acts as a potent biostimulant, optimizing both aesthetic and physiological traits in Alstroemeria. This study highlights the potential of fulvic acid in enhancing ornamental plant quality and proposes further research to explore its long-term effects on other species and horticultural practices.
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