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- Publisher
- de Gruyter
- Copyright
- Copyright © 2016 by the
- ISSN
- 1338-5259
- eISSN
- 1338-5259
- DOI
- 10.1515/ahr-2016-0012
- Publisher site
- See Article on Publisher Site
Abstract
Abstract An important method of investigating N 2 O emissions from cropland is model simulation. The measured data of N 2 O emissions under conventional tillage (CT) and reduced tillage (RT) with (N1) and without (N0) N fertilizer application were used to test the DNDC model during the year 2012 (April-December) in Slovakia. There was found a good agreement with seasonal N 2 O emissions only for CTN0 treatment, but in case of other treatments DNDC overestimated the emissions. The relative deviation between observed and simulated total seasonal N 2 O emissions (kg N ha −1 ) from four treatments were 46%, 164%, 346% and 321% for CTN0, CTN1, RTN0 and RTN1, respectively. Also, some discrepancies were found between observed and simulated emissions when evaluating the daily N 2 O emissions, especially when looking at the magnitude of N 2 O emissions peaks. The correlation between observed and simulated daily N 2 O emissions (N = 38) in case of conventional tillage was quite high and significant with r = 0.48 ( P <0.01), r = 0.45 ( P <0.01) for CTN0 and CTN1 treatment, respectively. On the other hand, there was found poor correlation in reduced tillage treatment with r = 0.22 ( P >0.01) and r = 0.39 ( P >0.01), for RTN0, RTN1, respectively.
Journal
Acta Horticulturae et Regiotecturae – de Gruyter
Published: Nov 1, 2016