APPLICATION OF THE DNDC MODEL FOR ESTIMATION OF CARBON AND NITROGEN EXCHANGE PARAMETERS IN ARABLE SOILS IN NON-CHERNOZEM ZONE
https://doi.org/10.7868/S2587556618020073
Abstract
The approbation of the DNDC (DeNitrification-DeComposition) model was done with the aim to estimate an opportunity of model using for analysis of carbon and nitrogen exchange and greenhouse gases dynamics in agroecosystems of arable soils in the Central Non-Chernozem Zone of Russia. The research can be divided into two blocks: estimation of model sensitivity and its verification on the base of field experiments data and statistical calculations. This article presents the results of analysis of model sensitivity to input parameters change. It is shown that in the Russian Non-Chernozem Zone the amount of fertilizers is the most important factor influencing on regional carbon and nitrogen biogeochemical cycles and the greenhouse gases emission. Annual increase of soil organic carbon content depends on weather conditions and soil texture (clay fraction). Carbon dioxide emission isensitive to crops biological characteristics and tillage intensity. According to modeling data, in the Non-Chernozem Zone’s agrocenoses methane is primarily absorbed by soil. The concentration of nitrous oxide is more sensitive to tillage and fertilizing than to amount of precipitation, and its annual values fluctuate in a small range.
About the Author
Olga E. Sukhoveeva
Institute of Geography, Russian Academy of Sciences
Russian Federation
Russian Federation
Olga E. Sukhoveeva
Moscow
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- Sensitivity of the DNDC (DeNitrification-DeComposition) model to the changes in input parameters was estimated for Non-Chernozem zone.
- In this region greenhouse gases emission mainly depends on the amount of fertilizers applied.
- Weather conditions, soil texture, crops features, tillage intensity mostly affect the carbon cycle.
- Tillage and fertilizing are more important factors for nitrous oxide emission than precipitations.
Review
For citations:
Sukhoveeva O.E. APPLICATION OF THE DNDC MODEL FOR ESTIMATION OF CARBON AND NITROGEN EXCHANGE PARAMETERS IN ARABLE SOILS IN NON-CHERNOZEM ZONE. Izvestiya Rossiiskoi Akademii Nauk. Seriya Geograficheskaya. 2018;(2):74-85. (In Russ.) https://doi.org/10.7868/S2587556618020073
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