干旱区生态环境知识资源中心(Arid): Nitrogen and phosphorus retention budgets of a semiarid plain basin under different human activity intensity

Arid

DOI	10.1016/j.scitotenv.2019.134813
	Nitrogen and phosphorus retention budgets of a semiarid plain basin under different human activity intensity
	Zhang, Xiaoxin 1; Yi, Yujun 1; Yang, Zhifeng 1,2
通讯作者	Yi, Yujun
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2020
卷号	703
英文摘要	Excessive nitrogen (N) and phosphorus (P) runoff from human activities results in degraded water quality. It is, therefore, crucial to quantitatively assess nutrient inputs over time and their impact on riverine nutrient exports. In this study, we estimated the long-term (1995-2015) nutrient inputs at the county scale by integrating Net Anthropogenic Nitrogen Input (NANI) and Net Anthropogenic Phosphorus Input (NAPI) methods, and nutrient exports into rivers by the Export Coefficient Model (ECM) for a semi-arid plain basin, the Baiyangdian (BYD) Basin, China. The results showed that N and P input intensities in the year 2015 reached 18852 kg N km(2) yr(-1) and 2073 kg P km(-2) yr(-1), showing a 35% and 11% increase in comparison with 1995, respectively. About 60% of these nutrients were derived from fertilizer application. The multi-year averaged N and P exported to rivers was 548 kg N km(-2) yr(-1) and 79 kg P km(-2) yr(-1), respectively. Hotspots for nutrient budgets were found in the southeastern counties. Hotspots covered about 12% of the total land, but contributed by 38-52% of total nutrient budgets. The nutrient export ratios showed no significantly temporal variations, and only about 2.15-2.89% of NANI and NAPI were exported into rivers. The low nutrient export ratio was due to the low water discharge that limited the nutrient transportation in the semi-arid plain basin. As most of anthropogenic nutrient inputs were retained in the basin, their impacts on the pollution of soils and aquifers need to be considered and adequately addressed in the future. This study constructs the spatial quantitative nutrient budgets, which can provide effective information for region policy formulation. (C) 2019 Elsevier B.V. All rights reserved.
英文关键词	NANI NAPI Export Coefficient Model Baiyangdian Semiarid
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000505924300119
WOS关键词	ANTHROPOGENIC NITROGEN ; WATER-QUALITY ; INPUTS NANI ; LAKE ; EXPORT ; IMPACTS ; FLUXES
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
EI主题词	2020-02-10
来源机构	北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/312855
作者单位	1.Beijing Normal Univ, State Key Lab Water Environm Simulat, Sch Environm, Beijing 100875, Peoples R China; 2.Guangdong Univ Technol, Inst Environm & Ecol Engn, Guangzhou 510006, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Xiaoxin,Yi, Yujun,Yang, Zhifeng. Nitrogen and phosphorus retention budgets of a semiarid plain basin under different human activity intensity[J]. 北京师范大学,2020,703.
APA	Zhang, Xiaoxin,Yi, Yujun,&Yang, Zhifeng.(2020).Nitrogen and phosphorus retention budgets of a semiarid plain basin under different human activity intensity.SCIENCE OF THE TOTAL ENVIRONMENT,703.
MLA	Zhang, Xiaoxin,et al."Nitrogen and phosphorus retention budgets of a semiarid plain basin under different human activity intensity".SCIENCE OF THE TOTAL ENVIRONMENT 703(2020).