Abstract
Some results of monitoring (for the period from 1992 to 2005) related to transformations of carbon in agroecosystems of Baikal Siberia (Russia) characterized by unpolluted grey forest soils as well as the soils technogenically polluted with heavy metals are discussed with use the unique approach to integrated assessment of the agroecosystem’s functioning regime. The peculiarities of accumulation of carbon in soil microbial biomass and CO2 emission during the years differing in climate conditions are demonstrated. Analysis of formation of net-mineralized and (re)immobilized carbon is conducted, their ratio being used for the purpose of assessment of the level of influence upon the agroecosystem. The agroecosystems having technogenically polluted soils are characterized by processes of the soil microbial biomass reduction and by an obvious increase of CO2 emission into the atmosphere. Negative changes, which are bound up with carbon transformation, are intensified under unfavorable climate conditions. Intensification of processes of carbon net mineralization and, vice versa, lowering the intensity of processes related to carbon (re)immobilization (especially under the effect of soil pollution and climate changes) provoke instability of the agroecosystem and cause formation of a new regime of its functioning.
Highlights
The negative anthropogenic impact on land ecosystems is known to be bound up with technogenic pol-How to cite this paper: Pomazkina, L.V., Sokolova, L.G. and Semenova, Y.V. (2014) Assessment of the Regime of Functioning Agroecosystems Depending on the Climate and Technogenic Pollution of the Soils
According to the norms approved in Russia, the summary pollution of the soil with heavy metals (HMs) was corresponding to the “admissible” level, which did not change even in 14 years of the monitoring
The present paper discussed the results of authors’ investigations of carbon transformations in agroecosystems on account of natural-climate factors. These investigations were bound up with the conjugate assessment of the microbial biomass in soils and CO2 emission into the atmosphere. These were conducted on the agroecosystems having grey forest soils, which belonged to the territory of Baikal Siberia
Summary
The negative anthropogenic impact on land ecosystems is known to be bound up with technogenic pol-How to cite this paper: Pomazkina, L.V., Sokolova, L.G. and Semenova, Y.V. (2014) Assessment of the Regime of Functioning Agroecosystems Depending on the Climate and Technogenic Pollution of the Soils. (2014) Assessment of the Regime of Functioning Agroecosystems Depending on the Climate and Technogenic Pollution of the Soils. Dynamic variations of greenhouse gas concentration in the atmosphere are considered to be the main factor, which influence the climate [1]-[4]. In this connection, one of the objectives presumed by the Kioto Protocol (1992) was to lower the CO2 emission into the atmosphere. The problem of greenhouse gases is acute and still not solved for the territory of Russia, what is conditioned by substantial diversity of the natural and climate conditions
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