Using Different Models to Estimate N2O Fluxes from Maize Cultivation in Poland
Alina Syp, Antoni Faber
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Department of Bioeconomy and Systems Analysis, Institute of Soil Science
and Plant Cultivation − State Research Institute,
8 Czartoryskich Str., 24-100 Puławy, Poland
Online publish date: 2017-09-28
Publish date: 2017-11-07
Submission date: 2017-03-27
Final revision date: 2017-05-04
Acceptance date: 2017-05-04
Pol. J. Environ. Stud. 2017;26(6):2759–2766
This paper presents a comparison of N2O fluxes calculated using empirical and biogeochemical models at the country level applying different climatic conditions. The empirical tools follow Tier 1 and 2 IPCC methods, whereas the process-based model follows Tier 3. In our study the following tools were applied: for Tier 1 – BioGrace calculator, Tier 2 − Lesschen emission factors (Lesschen-EF), and Tier 3 − denitrificationdecomposition (DNDC) model. The N2O fluxes were calculated for maize grown in four-yr crop rotation in Poland. The same input data were applied in all methods, and the sequence of N2O fluxes from largest to lowest was: BioGrace calculator > Lesschen-EF > DNDC. The average N2O emission from maize cultivation applying IPCC default value was 3.17 kg N ha-1 yr-1. Almost two-fold lower fluxes were calculated based on the Lesschen-EF and DNDC model. At a regional level, the Lesschen-EF as well as DNDC model were performed. Therefore, the Lesschen-EF could be recommended for countries to calculate N2O emissions. The advantage of this approach is simplicity of obtaining the necessary data compared to the processbased model requirements. Additionally, the Tier 2 method offers mitigation measures comparable to the DNDC model, related to crop type, weather conditions, and management practices.