ИЗМЕНЕНИЕ ЭМИССИИ ДИОКСИДА УГЛЕРОДА НА АНТРОПОГЕННО-НАРУШЕННЫХ УГОДЬЯХ ЗАПАДНО-КАЗАХСТАНСКОЙ ОБЛАСТИ

Abstract

The respiration rate and CO2 content in the soil air depends on the temperature and humidity of the soil, the groundwater level, the growth of the aerial and root mass, as well as the features of the transformation of organic material. The need to estimate the emission of greenhouse gases from agricultural soils is associated with a quantitative assessment of carbon stocks in the studied
soils and carbon emissions from them. Unfortunately, studies on the spatial variability of greenhouse gas emissions and organic carbon content in the soils of the steppe zone of the Ural region are rare. The work was performed in the spring of 2018 in the territory of the West Kazakhstan region. Dark chestnut soils of various types of land use (pasture, arable land) were chosen as objects of research. The degree of salinization varies from non-saline in the upper horizons to slightly and moderately saline in the lower horizons, which is associated with the influence of saline soil-forming rock and water discharge regime. The data obtained are
characterized by a higher rate of mineralization of organic matter in arable soils, and as a result, a higher emission of carbon dioxide, which is comparable to the emission of carbon dioxide on grazing soils. Based on our research, the following conclusions can be made: carbon dioxide emissions during the spring period vary by months, reaching a maximum in April and a minimum in May, which is explained by soil moisture and temperature indicators. The average carbon dioxide emission for the season is slightly higher on arable land, which is explained by the pasture grazing.