An ever-increasing amount of microplastics enters the environment and affects soil properties and plant growth. Investigating how the interactions between microplastics and soil properties vary across different soil types is crucial. In sandy soil, the subcritical SWR induced by microplastics may affect other soil properties. The objective of this study was to assess the impact of adding three types of microplastics (high-density polyethylene, polyvinyl chloride, and polystyrene) at a concentration of 5% (w/w) to sandy soil on the persistence and severity of SWR, as well as on various soil properties (bulk density, water sorptivity, and hydraulic conductivity) and plant characteristics (fresh and dry weight, maximum photochemical efficiency of PSII, and nutrient content) of radish (Raphanus sativus L.). It was found that microplastic contamination increased the persistence and severity of SWR and decreased soil bulk density, water sorptivity, and hydraulic conductivity. The total biomass measurements did not reveal a significant difference between the microplastic treatments and the control group. This study did not confirm any significant influence of microplastic contamination on the maximum photochemical efficiency of PSII, a measure of crop photosynthesis. Even though the value of photosynthetic efficiency changed with time, the values for all treatments stabilised at the end of the experiment. Microplastic contamination did not significantly alter crops’ nitrogen, phosphorus, potassium, or zinc contents. However, the copper content was reduced in all treatments, and magnesium and iron were reduced in the PVC and PS treatments compared to the control. The microplastic-induced changes in biomass or photosynthetic efficiency do not correspond to the changes in crop element concentrations.

In recent years, there has been a growing recognition of microplastics (MPs) as significant emerging pollutants. Soil contamination by MPs, comprising plastic particles smaller than 5 mm, originates from diverse sources. The introduction of foreign substances such as MPs can instantly modify the physical properties of soil or influence soil processes, depending upon the characteristics of the plastic. The limited available studies provide evidence that insufficient attention is being paid to the impact of plastic input on soil evaporation processes. The objective of this study was to assess the impact of contamination of three types of soil (Chernozem, Umbrisol, and Luvisol) with different MPs (high-density polyethylene, polyvinyl chloride, and polystyrene) at a concentration of 5% (w/w) on the evaporative mass loss. The presence of polyvinyl chloride (PVC), high-density polyethylene (HDPE), and polystyrene (PS) significantly altered evaporative soil loss, dry bulk density, and saturated water content in different soil types. Evaporative mass loss significantly increased in Luvisol and Umbrisol soils contaminated with HDPE and in Umbrisol contaminated with PVC. In Chernozem, contamination with all examined MPs significantly reduced dry bulk density. A similar decrease in dry bulk density was observed in Luvisol and Umbrisol with PVC and HDPE. Significant reductions in saturated water content were recorded in Chernozem contaminated with HDPE, Luvisol with PS, and Umbrisol with both HDPE and PS.