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首页> 外文期刊>Acta horticulturae et regiotecturae >MEASURED AND MODELED (DNDC) NITROUS OXIDE EMISSIONS (N_2O) UNDER DIFFERENT CROP MANAGEMENT PRACTICES IN THE NITRA REGION, SLOVAKIA
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MEASURED AND MODELED (DNDC) NITROUS OXIDE EMISSIONS (N_2O) UNDER DIFFERENT CROP MANAGEMENT PRACTICES IN THE NITRA REGION, SLOVAKIA

机译：斯洛伐克NITRA地区不同作物管理措施下的可测量和模拟（DNDC）一氧化二氮排放量（N_2O）

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摘要

An important method of investigating N_2O emissions from cropland is model simulation.The measured data of N_2O emissions under conventional tillage (CO and reduced tillage (RT) with (N1) and without (NO) N fertilizer application were used to test theDNDC model during the year 2012 (April-December) in Slovakia. There was found a good agreement with seasonal N_2O emissions only for CTNO treatment, but in case of other treatments DNDC overestimated the emissions. The relative deviation between observed and simulated total seasonal N_2O emissions (kg N ha') from four treatments were 46%, 164%, 346% and 321% for CTNO, CTN1, RTNO and RTN1, respectively. Also, some discrepancies were found between observed and simulated emissions when evaluating the daily N_2O emissions, especially when looking at the magnitude of N_2O emissions peaks. The correlation between observed and simulated daily N_2O 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 CTNO 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 RTNO, RTN1, respectively.
机译：模型模拟是研究农田N_2O排放的重要方法。在传统耕作（CO和减少耕作（RT）有（N1）和没有（NO）氮肥的情况下，N_2O排放的实测数据被用来测试DNDC模型。斯洛伐克2012年（4月至12月），发现仅季节性CTNO处理与季节性N_2O排放有很好的一致性，但在其他处理的情况下，DNDC则高估了排放。 ha'）的四种排放分别为CTNO，CTN1，RTNO和RTN1的46％，164％，346％和321％，此外，在评估每日N_2O排放时，特别是在观察每日N_2O排放时，发现与模拟排放之间存在一些差异。在常规耕作的情况下，观察到的模拟N_2O每日排放量与模拟的每日N_2O排放量（N = 38）之间的相关性非常高，且具有显着性，r = 0.48（P < 0.01），CTNO和CTN1处理的r分别为0.45（P <0.01）。另一方面，对于RTNO，RTN1，减耕处理的相关性差，r = 0.22（P> 0.01）和r = 0.39（P> 0.01）。

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