Integral assessment of the effect of technogenic pollution and climatic factors on agroecosystems of Baikal natural territory

Abstract

The results of long-term (1992–2005) monitoring of carbon transformation in agroecosystems on grey forest soils, both unpolluted and polluted by heavy metals, in the Baikal natural territory are presented. The specific features of carbon accumulation in humus, soil microbe biomass, wheat phytomass, as well as CO2 emission in years with different climatic conditions, are demonstrated. Special attention is paid to the investigation of net-mineralization and (re)immobilization of carbon. The ratio between net-mineralized and (re)immobilized carbon flow is used for integral assessment of the impact on the agroecosystem. Unfavorable hydrothermal conditions enhanced the negative impact of pollution on carbon transformation. The effect of environmental conditions on the formation of new regimes of agroecosystem functioning is discussed in terms of synergetics.