气候变化领域集成服务门户(CCPortal): Hydro-climatic controls explain variations in catchment-scale nitrogen use efficiency

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DOI	10.1088/1748-9326/ab9691
	Hydro-climatic controls explain variations in catchment-scale nitrogen use efficiency
	Scaini A.; Zamora D.; Livsey J.; Lyon S.W.; Bommarco R.; Weih M.; Jaramillo F.; Manzoni S.
发表日期	2020
ISSN	17489318
卷号	15 期号:9
英文摘要	The efficiency of fertilizer conversion to harvestable products is often low in annual crops such that large amounts of nutrients are lost from fields with negative consequences for the environment. Focusing on nitrogen (N) use efficiency (NUE: the ratio of N in harvested products over the sum of all N inputs), we propose that hydrological controls can explain variations in NUE, because water mediates both the uptake of N by plants and N leaching. We assess these controls at the catchment scale, at which the water balance can be constrained by precipitation and runoff data and NUE can be quantified with census data. With this approach we test the hypotheses that a higher evaporative ratio (ET/P: the ratio of evapotranspiration over precipitation) increases N retention, thereby increasing NUE both across catchments at a given time and through time. With data from 73 catchments in the United States, encompassing a wide range of pedoclimatic conditions for the period 1988-2007, we apply a linear mixed effect model to test the effect of ET/P on NUE. Supporting our hypotheses, ET/P was positively related to NUE, and NUE increased through time. Moreover, we found an interaction between ET/P and time, such that the ET/P effect on NUE decreased in the period 1998-2007. We conclude that climatic changes that increase ET/P without negatively affecting yields, will increase N retention in the examined catchments. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	agriculture; catchment scale; evaporative ratio; evapotranspiration; fertilization; nitrogen use efficiency; precipitation
语种	英语
scopus关键词	Catchments; Efficiency; Evapotranspiration; Nitrogen; Population statistics; Catchment scale; Climatic changes; Climatic controls; Hydrological controls; Mixed-effect models; Nitrogen-use efficiency; Precipitation and runoff; Use efficiency; Runoff; catchment; climate variation; evapotranspiration; fertilizer application; leaching; nitrogen; nutrient use efficiency; precipitation (climatology); runoff; water budget
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/153746
作者单位	Department of Physical Geography, Stockholm University, Stockholm, 10691, Sweden; Bolin Centre for Climate Research, Stockholm University, Stockholm, 10691, Sweden; Civil and Agricultural Department, Universidad Nacional de Colombia, Bogotá, Colombia; Instituto de Estudios Ambientales, Universidad Nacional de Colombia, Bogotá, Colombia; School of Environment and Natural Resources, OARDC Wooster, Ohio State UniversityOH 44691, United States; Department of Ecology, Swedish University of Agricultural Sciences, Uppsala, 75007, Sweden; Department of Crop Production Ecology, Swedish University of Agricultural Sciences, Uppsala, 75007, Sweden; Baltic Sea Centre, Stockholm University, Stockholm, 10691, Sweden
推荐引用方式 GB/T 7714	Scaini A.,Zamora D.,Livsey J.,et al. Hydro-climatic controls explain variations in catchment-scale nitrogen use efficiency[J],2020,15(9).
APA	Scaini A..,Zamora D..,Livsey J..,Lyon S.W..,Bommarco R..,...&Manzoni S..(2020).Hydro-climatic controls explain variations in catchment-scale nitrogen use efficiency.Environmental Research Letters,15(9).
MLA	Scaini A.,et al."Hydro-climatic controls explain variations in catchment-scale nitrogen use efficiency".Environmental Research Letters 15.9(2020).