气候变化领域集成服务门户(CCPortal): Hydrology is the key factor for nitrogen export from tile-drained catchments under consistent land-management

CCPortal

DOI	10.1088/1748-9326/aba580
	Hydrology is the key factor for nitrogen export from tile-drained catchments under consistent land-management
	Bauwe A.; Kahle P.; Tiemeyer B.; Lennartz B.
发表日期	2020
ISSN	17489318
卷号	15 期号:9
英文摘要	In this study, 14 years of climate, stream flow, land management, nitrate-nitrogen (NO3 -N) load and concentration data were analyzed to identify potential drivers for NO3 -N losses at two tile-drained catchments under cropland use in northeastern Germany. Mean ( standard deviation) annual NO3 -N concentrations were 9.7 2.9 (drainage plot) and 6.8 2.4 mg l-1 (ditch catchment), while mean annual NO3 -N loads amounted to 22 16 and 20 16 kg ha-1, respectively. Significant positive relationships between annual discharge and annual NO3 -N losses underlined the importance of hydrologic conditions on NO3 -N export mechanisms. No direct relationships were found between N soil surface surpluses and NO3 -N losses. Any possible impact of N soil surface surpluses on NO3 -N export rates was overridden by the hydro-meteorological conditions in the catchment. Positive correlations between the climatic water balance and NO3 -N losses suggest that agricultural catchments with similar characteristics as ours may face - without countermeasures - increased N losses in the future as regional climate projections predict wetter winters in the coming decades. Our analysis has further shown that effects of land management strategies aiming at reducing N losses into surface waters might only become visible with a delay of years or even decades. © 2020 The Author(s). Published by IOP Publishing Ltd.
语种	英语
scopus关键词	Agricultural robots; Data streams; Land use; Nitrogen; Runoff; Stream flow; Agricultural catchments; Climatic water balance; Hydrologic conditions; Meteorological condition; North-eastern germany; Positive correlations; Regional climate projections; Standard deviation; Catchments; catchment; climate modeling; concentration (composition); hydrology; land management; nitrate; nitrogen; regional climate; streamflow
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153804
作者单位	Faculty of Agricultural and Environmental Sciences, University of Rostock, Justus-von-Liebig-Weg 6, Rostock, 18059, Germany; Thunen Institute of Climate-Smart Agriculture, Bundesallee 65, Braunschweig, 38116, Germany
推荐引用方式 GB/T 7714	Bauwe A.,Kahle P.,Tiemeyer B.,et al. Hydrology is the key factor for nitrogen export from tile-drained catchments under consistent land-management[J],2020,15(9).
APA	Bauwe A.,Kahle P.,Tiemeyer B.,&Lennartz B..(2020).Hydrology is the key factor for nitrogen export from tile-drained catchments under consistent land-management.Environmental Research Letters,15(9).
MLA	Bauwe A.,et al."Hydrology is the key factor for nitrogen export from tile-drained catchments under consistent land-management".Environmental Research Letters 15.9(2020).