VERIFICATION OF THE DNDC MODEL FOR ESTIMATION OF CARBON AND NITROGEN EXCHANGE PARAMETERS IN ARABLE SOILS IN CENTRAL NON-CHERNOZEM ZONE
https://doi.org/10.1134/S2587556618040155
Abstract
The approbation of the DNDC (DeNitrification-DeComposition) model was done. The aim of research was to evaluate 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 in Russia. The verification of the model on the base of literature data detected that, as a rule, in arable Non-Chernozem soils modeled values of carbon biogeochemical cycle components and carbon dioxide emission are no higher than real ones. For nitrogen uptake by crops and nitrogen, leaching under fertilizing conditions, there was not conformity between modeled results and field experiments data. The method of verification on the base of carbon content in crop biomass calculation was presented. DNDC is good for spring grain crops modeling, but often the values of plant biomass are decreased by model plant biomass.
About the Author
O. E. Sukhoveeva
Institute of Geography, Russian Academy of Sciences.
Russian Federation
Moscow.
Russian Federation
Moscow.
References
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Graphical Abstract
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1. Сопоставление данных моделирования с результатами полевых измерений (верификация модели DNDC по литературным источникам) и Верификация модели DNDC по содержанию углерода в биомассе сельскохозяйственных культур: озимой пшеницы, ячменя и картофеля | |
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2. Comparison of modelled values and measured in field conditions ones (the model DNDC verification on the base of literature sources) and Verification of the model DNDC on the base of carbon content in crops biomass (for winter wheat, barley, and potato) | |
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| Type | Исследовательские инструменты | |
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- The DNDC (DeNitrification-DeComposition) model represents correctly values of CO2 emission and other components of carbon biogeochemical cycle.
- The modeled values of nitrogen cycle components in the Non-Chernozem zone differ from the measured ones.
- The DNDC model properly predicts patterns of crops biomass formation and its input into soil.
- A method for the DNDC model verification on the base of carbon content in crop biomass is presented.
- In Russia the best model’s results were obtained for the grain crops.
Review
For citations:
Sukhoveeva O.E. VERIFICATION OF THE DNDC MODEL FOR ESTIMATION OF CARBON AND NITROGEN EXCHANGE PARAMETERS IN ARABLE SOILS IN CENTRAL NON-CHERNOZEM ZONE. Izvestiya Rossiiskoi Akademii Nauk. Seriya Geograficheskaya. 2018;(4):88-95. (In Russ.) https://doi.org/10.1134/S2587556618040155
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