气候变化领域集成服务门户(CCPortal): Long-Term Simulated Direct N2O Emissions from German Oilseed Rape Cultivation below the IPCC Emission Factor

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DOI	10.3390/agriculture14010070
	Long-Term Simulated Direct N2O Emissions from German Oilseed Rape Cultivation below the IPCC Emission Factor
	Raebiger, Thomas; Neukam, Dorothee; Kniess, Astrid; Boettcher, Ulf; Kage, Henning; Kuehling, Insa; Pokovai, Klara; Molnar, Sandor
发表日期	2024
EISSN	2077-0472
起始页码	14
结束页码	1
卷号	14 期号:1
英文摘要	The low nitrogen (N)-use efficiency of intensive winter oilseed rape (WOSR) cropping systems may cause negative environmental impacts, especially due to N leaching and gaseous losses. The aim of this study was to use data from field experiments (five sites across Germany representing typical WOSR regions) for parametrization of a nitrous oxide (N2O) emission component for implementation into a process-based dynamic plant-soil-atmosphere model (PSAM). After calibration and evaluation with three years of field data from five different N fertilizer treatments, a long-term simulation with 25-year historical weather data was conducted to derive functional relations and emission factors (EFs). The model performed best at higher aggregation levels (cumulative emissions over the entire cropping period, R-2 of 0.48/0.77 for calibration/evaluation), but also reasonably simulated short-term dynamics (e.g., fertilizer applications, extreme weather events). Site-specific and year-specific N2O emissions varied within the range of medians from 0.56-4.93 kg N2O-N ha(-1). Mineral fertilizer-induced EFs at economic optimal N inputs ranged from 0.16-0.65%, which was markedly below the aggregated IPCC standard value of 1% for direct N2O emissions. Generally, the simulated emissions were consistently higher with finer soil textures and increasing N inputs. The process-based approach, moreover, allowed the identification of the major source of N2O, which mainly originated from nitrification processes.
英文关键词	nitrous oxide; GHG emissions; winter canola; simulation; N efficiency; climate change
语种	英语
WOS研究方向	Agriculture
WOS类目	Agronomy
WOS记录号	WOS:001151764800001
来源期刊	AGRICULTURE-BASEL
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/298702
作者单位	University of Kiel
推荐引用方式 GB/T 7714	Raebiger, Thomas,Neukam, Dorothee,Kniess, Astrid,et al. Long-Term Simulated Direct N2O Emissions from German Oilseed Rape Cultivation below the IPCC Emission Factor[J],2024,14(1).
APA	Raebiger, Thomas.,Neukam, Dorothee.,Kniess, Astrid.,Boettcher, Ulf.,Kage, Henning.,...&Molnar, Sandor.(2024).Long-Term Simulated Direct N2O Emissions from German Oilseed Rape Cultivation below the IPCC Emission Factor.AGRICULTURE-BASEL,14(1).
MLA	Raebiger, Thomas,et al."Long-Term Simulated Direct N2O Emissions from German Oilseed Rape Cultivation below the IPCC Emission Factor".AGRICULTURE-BASEL 14.1(2024).