ИСТИНА

Geographical Network of Field Experiments in Russia includes several long-term experiments (LTEs) with equivalent NPK rates of mineral, organic and organic-mineral fertilization systems. RothC dynamic model was used to monitor SOC changes in 7 such LTEs having been maintained for more than three decades with high quality monitoring of vegetation and soils and potential for access to data. These LTEs represent a diverse range of climatic factors and management practices in order to make an assessment of the potential of conventional management practices to store >4‰ per annum in European Russia.The model outputs show preference of organic fertilization for obtaining the indicator value for SOC fixation in arable soil. The results also demonstrate that conventional land management practices with only mineral fertilization may hardly be recommended for C sequestration in arable soils. FYM application in a combined organic and mineral fertilizers application as well as possible change in management practices is required to reach the 4‰ limit for such areas.