Home – Home – Jornals – Siberian Journal of Forest Science 2025 number 3

Based on the results of studies in 2022-2023, an assessment was made of carbon reserves in the pools of phytomass of the stand, forest litter, and soil organic matter in birch stands in different areas of the southern forest-steppe of Omsk Oblast - on the territory of the carbon polygon site of the Omsk State Agrarian University and in the vicinity of the village of Kordon (Isilkulsky District of Omsk Oblast). Birch forests in the studied areas differ in forest survey indicators - average height, density of growth and the sum of cross-sectional areas. The stem wood stock (155.3-159.6 m³/ha) and the carbon stock in phytomass (57.05-61.07 t/ha) in birch stands on meadow-black soil of the carbon testing site are significantly lower than the corresponding indicators (233.1-259.3 m³/ha; 87.35-94.81 t/ha) on gray forest soil in the vicinity of the village of Kordon. On the contrary, the total reserves of soil carbon in the 0-50 cm layer on the meadow-black soil of the carbon polygon are higher (170.35 t/ha) than on the dark gray forest soil in the vicinity of the village of Kordon (115.72 t/ha).The total carbon stocks in the forest litter in the study areas differ insignificantly - 3.65 t/ha in the vicinity of the village of Kordon and 4.23 t/ha in the carbon testing site. The total carbon stock in birch stands according to 2023 data differs slightly in different areas, amounting to 292.7 t/ha in the carbon polygon and 301.53 t/ha in the vicinity of the village of Kordon. It has been established that the productivity and carbon deposition function of birch tree stands in the southern forest-steppe of Omsk Oblast depends on the density of their growth and the type of soil cover.