BIOSTIMULANT OBTAINED FROM SEAWATER IN THE CULTIVATION OF CHINESE VEGETABLE PLANTS

This study evaluated FertilTomix, a product derived from an innovative seawater extraction process, for its effects on the germination and growth of Pak choi, Tatsoi, and Mizuna. Additionally, its potential to enhance resistance against the fungal pathogens Pythium sp. and Fusarium sp. was assessed. Starting November 2024, experiments were conducted in Research Centre for Vegetable and Ornamental Crops greenhouses in Pescia (PT) with three treatment groups: (i) control without biofertilizer, (ii) biofertilizer, and (iii) FertilTomix. Plants were irrigated every six days and cultivated for six months. On 26 May 2025, data were collected on germination percentage, average germination time, plant height, leaf number, leaf area, vegetative and root biomass, root length, and total bacterial count in the substrate. Disease incidence caused by Pythium sp. and Fusarium sp. was also evaluated. FertilTomix significantly improved all agronomic parameters assessed. Seed germination rates increased, while average germination time decreased across Pak choi, Tatsoi, and Mizuna. Additionally, the incidence of seedling diseases caused by Pythium sp. and Fusarium sp. was reduced. Extracts obtained through an innovative mineral extraction process from seawater significantly enhanced plant growth and disease resistance. This approach offers a sustainable option for repurposing recycled seawater for irrigation, particularly in regions with limited freshwater resources. The mineral and organic components in seawater appear to promote plant development and strengthen defense mechanisms, potentially through both direct and indirect effects on soil microfauna. Keywords: Seawater minerals; Microorganisms; Sustainable agriculture; Biofertilizers; Rhizosphere