Biochemical Analysis and Toxicity Assessment of Utilization of Argon Oxygen Decarbonization Slag as a Mineral Fertilizer for Tall Fescue (Festuca arundinacea Schreb) Planting

Argon oxygen decarbonization (AOD) slag refers to a byproduct of stainless steel (SS) production, which has caused considerable environmental stress. Finding an effective approach for recycling AOD is essential safety. In this work, batch leaching tests were carried out explore the behavior and soil. Pot experiments was conducted analyze fertilization effect tall fescue (Festuca arundinacea Schreb) planting. The plant height, biomass, total root length (TRL), surface area (RSA), tips (RT), hairs (RH)), chlorophyll content, malondialdehyde (MDA) antioxidant enzyme activities seedlings measured. As indicated from results, adding into soil increased pH. concentration Ca, Si, Al, Cr higher than original soil, while that Mg, Mn, Fe lower. Low addition rate (≤1%) good growth, synthesis, whereas high (≥2%) exerted opposite effect. Elevating accumulation in seedling aggravated damage reactive species (ROS). When at low (≤1%), ROS scavenging attributed synergistic effects superoxide dismutase (SOD), peroxidase (POD), catalase (CAT) defense systems, fertilization, excessive could be mainly due CAT system.