Akademik Veri Yönetim Sistemi
Journal of Material Cycles and Waste Management, 2026 (SCI-Expanded, Scopus)
Large amounts of marine biomass remain on coasts as waste despite high organic carbon content. The seagrass Posidonia oceanica (PO) accumulates along shorelines and is commonly landfilled or burned, generating disposal costs and emissions. Valorizing this marine residue as an agricultural amendment could reduce coastal waste pressures and recycle carbon and nutrients. Salinity increasingly constrains wheat establishment in salt-affected irrigated areas. Raw Posidonia oceanica residue (RPO) and its biochars produced at 350 °C (POB1) and 550 °C (POB2) were evaluated as waste-derived amendments to improve wheat germination under saline and non-saline conditions. The materials were tested on three wheat (Triticum aestivum L.) cultivars (Gönen 98, Kaşifbey 95, Ziyabey 98) under 0 and 200 mM NaCl in Petri-dish bioassays. Germination capacity (GC), germination rate index (GRI), seedling vigor index (SVI), shoot and root growth, biomass, and water content were recorded after 12 days. Under salinity, Kaşifbey 95 remained relatively stable, whereas Gönen 98 showed the strongest overall response. RPO, including at 250 mg dish⁻¹, generally enhanced germination, vigor, root development, and water status, whereas PO-derived biochars were neutral or inhibitory at higher rates. Overall, early-stage performance under salinity was cultivar-dependent, and biochar conversion did not necessarily improve germination-stage outcomes without dose optimization; RPO shows potential for reuse linking coastal clean-up with saline agriculture.