o:2451 Impact of plastic pollution on the quality of arable soils in the Sava and Danube river valleys (Serbia) en Abstract: Plastic pollution is fast becoming a serious global environmental problem with the increase in plastic waste over recent decades. Plastic pollutants in the soil environment have an impact on the cycling of organic matter, global СО2 production, crop production, and soil properties. Crop production in plastic greenhouses is one of the serious sources of plastic pollution in the environment all over the world and particularly in Serbia. One of the first investigations of plastic and microplastic materials in the soil on the territory of Serbia is currently underway and is being carried out within the project „Evaluation of the Microplastic in the Soils of Serbia – EMIPLAST – SoS“ funded by the Science Fund of the Republic of Serbia. The aim of the research was to reveal the impact of the presence of plastic materials on soil’s main chemical, physical and biological properties. Soil sampling was carried out in 2022 from two depths (0–15 cm and 15–30 cm), side by side from the plastic greenhouse and non-greenhouse agricultural production as a control in the first project year. The research sites are located on the alluvial plains of the two largest rivers in Serbia, the Danube and the Sava. The following chemical parameters were determined on all samples: electrical conductivity, pH, CEC, total C, as well as nutritional status of the soil (N, P2O5, K2O, Cu, Zn, Mn and CaCO3). Concentrations of some microelements were also analyzed. Physical parameters determined were: particle size distribution, volumetric mass, specific mass and porosity. Microbial respiration, which serves as an indicator of enzymatic microbial activity in the soil, was measured by the alkaline trap method from surface soil. microplastics, soil quality, river valleys, soil respiration, pollution 1552100 978-80-244-6318-6 2023-06-30T06:47:17.008Z 44 no 46 Elmira Saljnikov Institute of Soil Science 0000-0002-6497-2066 46 Tara Grujić Institute of Soil Science 0000-0002-0122-6402 46 Marina Jovković Institute of Soil Science 0000-0001-7224-8556 46 Slađan Stanković Institute for Science Application in Agriculture, Belgrade 46 Slobodan Krnjajić University of Belgrade-Institute for Multidisciplinary Research, Serbia 0000-0001-5278-4589 46 Žaklina Marjanović University of Belgrade-Institute for Multidisciplinary Research, Serbia 0000-0001-5254-178X application/pdf 1353443 https://unilib.phaidrabg.rs/o:2451 no yes 1 70 92000004 71A05 The 5th WASWAC World Conference “Adaptation Strategies for Soil and Water Conservation in a Changing World” 58 59 2023