The Effect of De-Icing Salt Based on Sodium Chloride on the Relative Resistance of Hemerocallis Hybrida

Climate change increases frequency of heavy rainfalls in temperate regions. For big cities and metropolitan areas, alongside extreme heat, this has become a significant factor influencing the quality of life in cities. Therefore, modern urban greening focuses not only on creating aesthetically attractive landscapes but also on adapting the urban environment to new climatic conditions. Rain gardens are considered an efficient solution to reducing the burden on urban drainage systems by intercepting and treating stormwater via soil constructions and plants. Functionality and efficiency of rain gardens depend on their resistance to anthropogenic stressors, among which an impact of aggressive de-icing salts in wintertime is one of the most essential. The study aimed to investigate the impact of sodium chloride de-icing salts on the physiological parameters of one of the most common plants used in urban greening in Europe and the European part of Russia Hemerocallis hybrida. A vegetation experiment where Hemerocallis hybrida plants were irrigated with reagent solutions was carried out under controlled conditions. During the experiment, the transpiration rates of the plants and the chlorophyll levels in the leaves were measured using a SPAD 502 Plus device. The results of the study demonstrated that irrigation with de-icing salts resulted in a significant decrease of biomass, reduction of chlorophyll level, and an increase in plant transpiration. © 2025 Elsevier B.V., All rights reserved.