Changes of soil organic matter stock in meadow ecosystems in the south of Western Siberia

Abstract The study was conducted on the Baraba plain in southern part of Western Siberia. Soil samples meadow ecosystems that are at different stages succession after drying lake bottom were analyzed. research allowed us to establish content soil organic matter and microbial biomass (the active matter) successional formed floodplain salt gradually increases last development reaches values zonal chernozem soils. process accumulation carbon stocks humus slows down against background a high concentration salts individual horizons young profiles. This may be reason for revealed pattern, according which main stock concentrated upper (0-10 cm) layer emerging is especially noticeable very first initial stage next salicornia community (Salicornia perennans). In succession, solonetz chernozem-meadow soils under ecosystems. these significantly increase processes reducing amount profiles And only there significant 10-20 cm.