Climate Changes and their Connection with CO2 Emission in Agroecosystems on Agrogrey Soil of the Baikal Forest–Steppe
E. N. ZVYAGINTSEVA, Yu. V. SEMENOVA
Siberian Institute of Plant Physiology and Biochemistry SB RAS, 664033, Irkutsk, Lermontova str.,132
Keywords: CO2 emission from soils, agroecosystem, hydrothermal indicators, climatic changes
Abstract
Long-term (1997–2012) monitoring of agroecosystems on the agrogrey soil of the Baikal forest-steppe was carried out. The influence of climatic factors on CO2 emission to the atmosphere in different seasons of the year was studied. There was a close correlation between the CO2 flux and hydrothermal indicators in spring and autumn. The contribution of the summer season to the annual flux of CO2 made up 67 and 72 % in the fallow and wheat crop respectively. On the basis of 16-year observations the average annual CO2 emission was calculated: it amounted to 173 g C/m–2 in the fallow and 229 g C/m–2 in the wheat crop.
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