INFLUENCE OF HEAVY METALS POLLUTION IN SOIL AND CLIMATIC FACTORS ON THE FUNCTIONING OF AGROECOSYSTEMS IN THE FOREST-STEPPE OF THE BAIKAL REGION

Every year (1992-2005), the influence of climatic factors on the content of Cmic and the emission of CO2 from the soils were investigated in the agroecosystems on the technogenically polluted with heavy metals alluvial soils of the forest-steppe of the Baikal region. The dependence of СО2 emission on air temperature was revealed, especially in anomalous years. Changes in the eco-physiological indicators (Cmic / Corg, % and C-CO2 / Cmic, mg/(g h)) and carbon transformation in humus-rich soils showed differences in the stability of the microbial community. Analysis and synthesis of results based on the methodology of comparative and system analysis revealed changes in the mode of functioning of agroecosystems, depending on environmental factors.