干旱区生态环境知识资源中心(Arid): Dynamic variations of inorganic N in precipitation and its influencing factors in the Hexi Corridor, northwestern China

Arid

DOI	10.1016/j.apgeochem.2020.104678
	Dynamic variations of inorganic N in precipitation and its influencing factors in the Hexi Corridor, northwestern China
	Qi, Shi; Zhao, Wei; Shu, Heping; Ma, Jinzhu
通讯作者	Qi, S
来源期刊	APPLIED GEOCHEMISTRY
ISSN	0883-2927
EISSN	1872-9134
出版年	2020
卷号	120
英文摘要	Atmospheric N deposition patterns play an important role in the nitrogen cycles of arid ecosystems. This study observed a significant spatiotemporal variation in inorganic N concentrations in precipitation from 2013 to 2016 at eight sampling sites in the Hexi Corridor, northwestern China. Mean mNO(3)(-)/Cl- and mNH(4)(+)/NO(3)(-)values were 1.62 and 0.98 from late autumn to early spring, respectively, indicating that inorganic N in precipitation is most likely principally controlled by NO3- in response to coal-fired heating and low wind speeds. However, mean mNO(3)(-)/Cl- and mNH(4)(+)/NO3- were 0.91 and 2.69 from late spring to early autumn, respectively, suggesting that the primary contributor is NH3+ from agricultural soils and fertilizers. Mean annual mNH(4)(+)/NO3- values in the eastern sectors of the Hexi Corridor ranged from 0.57 to 1.55, but those in the central and western sectors ranged from 1.53 to 3.59. The ratios of mNH(4)(+)-N deposition flux to total wet deposition of inorganic N flux were >50% in the Corridor's central and western sectors, but <36% in its eastern sectors. These results reflect the differences in wet N deposition patterns between the western and eastern sectors of the Hexi Corridor. The spatiotemporal variations in NO2 concentrations appear consistent with those of NO(3)(- )in precipitation, indicating that atmospheric NO2 is a main driver of the spatiotemporal changes in the NH4+-N and NO3--N components found in precipitation. This study summarized previously published data to describe a spatial distribution pattern of inorganic N in precipitation in the Hexi Corridor. It provides data support for the formulation of environmental policies and agricultural N management in arid regions.
英文关键词	N wet deposition Temporal variations NO2 concentrations Natural factors Socioeconomic factors
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000566439000004
WOS关键词	NITROGEN DEPOSITION ; ATMOSPHERIC DEPOSITION ; WET DEPOSITION ; NO2 ; DESERT ; FUTURE ; MODEL ; CHEMISTRY ; EVOLUTION ; ECOSYSTEM
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326065
作者单位	[Qi, Shi] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [Zhao, Wei] Shaanxi Inst Geol Survey, Xian 710000, Peoples R China; [Shu, Heping] Lanzhou Univ, Coll Civil Engn & Mech, Key Lab Mech Disaster & Environm Western China, Minist Educ China, Lanzhou 730000, Peoples R China; [Ma, Jinzhu] Lanzhou Univ, Coll Earth & Environm Sci, Key Lab Western Chinas Environm Syst, Minist Educ, 222 South Tianshui Rd, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Qi, Shi,Zhao, Wei,Shu, Heping,et al. Dynamic variations of inorganic N in precipitation and its influencing factors in the Hexi Corridor, northwestern China[J]. 兰州大学,2020,120.
APA	Qi, Shi,Zhao, Wei,Shu, Heping,&Ma, Jinzhu.(2020).Dynamic variations of inorganic N in precipitation and its influencing factors in the Hexi Corridor, northwestern China.APPLIED GEOCHEMISTRY,120.
MLA	Qi, Shi,et al."Dynamic variations of inorganic N in precipitation and its influencing factors in the Hexi Corridor, northwestern China".APPLIED GEOCHEMISTRY 120(2020).