Validation of the CANDY model with Russian long-term experiments |
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Authors: | U Franko K Kuka I A Romanenko V A Romanenkov |
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Institution: | (1) Department of Soil Physics, Helmholtz Centre for Environmental Research, UFZ, Theodor-Lieser-Strasse 4, 06120 Halle, Germany;(2) All-Russian Institute of Agricultural Problems and Informatics, Kharitonievsky per., 21/6 Bld.1, 103064 Moscow, Russia;(3) Pryanishnikov All-Russian Institute of Agrochemistry (VNIIA), Pryanishnikova st., 31a, 127550 Moscow, Russia |
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Abstract: | The CANDY model has been qualitatively assessed for simulating long-term dynamics of soil organic carbon and tested against
different long-term experiments representing various land uses and geographical sites, but never before against conditions
of the Former Soviet Union (FSU). Our goal was to simulate long-term trends in soil organic carbon for the long-term experiments
of Barybino (Moscow region, Russia), Grakov (Kharkow region, Ukraine) and Yachenka (Minsk region, Belarus) representing the
predominant arable soil types, climate conditions and typical management strategies for the investigated arable areas. The
fit of modelled results to the observed data was evaluated to assess the suitability of the model for further applications
in the FSU. The crop parameters of the CANDY model had to be adapted to the low yields observed under the Russian site conditions
resulting in a higher sensitivity to crop-derived carbon input as a function of yield. The results show that the approach
of treating the organic carbon situated in micro pores as inert, is an applicable solution for simulating soil carbon dynamics
under Russian conditions. This evaluation of CANDY, against long-term experiments from Russia, gives confidence for its wider
application in this region. |
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Keywords: | CANDY Carbon dynamic Arable soils Long term experiments |
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