ASSESSMENT OF THE IMPACT OF CHEMICAL POLLUTION ON CO2 EMISSIONS FROM LIGHT AND DARK CHESTNUT SOILS IN A LONG-TERM LABORATORY EXPERIMENT

In a long-term laboratory experiment, an assessment was made of the direction of the influence of chemical pollution on CO₂ emissions from light and dark chestnut soils. Chemical contamination of soil samples was carried out with solutions of salts of potassium nitrate (KNO₃) and copper (II) sulfate crystallohydrate (CuSO₄×5H₂O) at doses of 1 and 5 MPC. CO₂ emissions were measured using a closed dynamic chamber method. It was found that artificial contamination with potassium nitrate and copper (II) sulfate increased the CO₂ flux from the surface of the samples of LC and DC soils in the range from 6 to 12%. depending on the contamination dose, exposure time, and soil type. It was found that the light chestnut soil is more sensitive to nitrate contamination, and dark chestnut soil is more sensitive to copper contamination. In general, the study of CO₂ emissions by regional soil types under conditions of chemical pollution requires a more detailed study to predict soil respiration in territories subject to anthropogenic pollution.

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