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	Background concentrations of elements in surface soils and their changes as affected by agriculture use in the desert-oasis ecotone in the middle of Heihe River Basin, North-west China
	Su, Yong-zhong; Yang, Rong
刊名	JOURNAL OF GEOCHEMICAL EXPLORATION
	2008-09-01
卷号	98期号:3页码:57-64
关键词	Background concentrations Desert soil Land cultivation Agricultural use Desert-oasis ecotone
ISSN号	0375-6742
DOI	10.1016/j.gexplo.2007.12.001
通讯作者	Su, Yong-zhong(suyzh@lzb.ac.cn)
英文摘要	The concentrations of twenty four chemical elements in the surface layer of natural desert soils and the cultivated farmland soils were measured at a desert-oasis ecotone in the middle of Heihe river basin, north-west China. Background values were estimated for (a) major elements (Si 335.3 g kg(-1), Al 49.4 g kg(-1), Fe 19.1 g kg(-1), Ca 29.4 g kg(-1), Mg 8.9 g kg(-1), K 20.1 g kg(-1), Na 17.5 g kg(-1) and P 0.338 g kg(-1)), (b) heavy metals and non-metals (Cr 55.8 mg kg(-1), Mn 404.8 mg kg(-1), Ni 17.7 mg kg(-1), Cu 5.1 mg kg(-1), Zn 33.7 mg kg(-1), Ph 15.5 mg kg(-1) and As 5.2 mg kg(-1)) and (c) other trace elements (Ti 2.0 mg kg(-1), V 55.3 mg kg(-1), Co 5.7 mg kg(-1), Rb 82.4 mg kg(-1), Sr 232.9 mg kg(-1), Y 14.7 mg kg(-1), Zr 194.9 mg kg(-1), Nb 7.8 mg kg(-1) and Ba 720.6 mg kg(-1)). After natural desert soil was cultivated for agricultural use, significant changes in element concentrations occurred under tillage, irrigation and fertilisation management. Compared to natural soil, the for the levels of Si, K, Na, Sr, Zr and Ba decreased, and no changes were observed for Rb, while the values of the other 17 elements increase in agricultural soil from 1.2 to 3.5 times. However, their absolute concentrations are still low, suggesting that the arable soil in this region remains comparatively a clean soil. The increased silt, clay and organic carbon content, under long-term irrigation, enriched the fine-grained materials, and application of fertilisers and manure contributed to the accumulation of most elements in arable soil. The accumulation of elements in agricultural soil increased with increasing cultivation years and extent of soil development. (c) 2008 Elsevier B.V. All rights reserved.
收录类别	SCI
WOS关键词	TRACE-ELEMENTS ; METALS ; CATALONIA ; BELGIUM ; SPAIN
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000262058000001
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2556119
专题	寒区旱区环境与工程研究所
通讯作者	Su, Yong-zhong
作者单位	Chinese Acad Sci, Lab Watershed Hydrol & Appl Ecol, Cold & Arid Reg Environm & Engn Res Inst, Linze Inland River Basin Res Stn,Chinese Ecosyst, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Su, Yong-zhong,Yang, Rong. Background concentrations of elements in surface soils and their changes as affected by agriculture use in the desert-oasis ecotone in the middle of Heihe River Basin, North-west China[J]. JOURNAL OF GEOCHEMICAL EXPLORATION,2008,98(3):57-64.
APA	Su, Yong-zhong,&Yang, Rong.(2008).Background concentrations of elements in surface soils and their changes as affected by agriculture use in the desert-oasis ecotone in the middle of Heihe River Basin, North-west China.JOURNAL OF GEOCHEMICAL EXPLORATION,98(3),57-64.
MLA	Su, Yong-zhong,et al."Background concentrations of elements in surface soils and their changes as affected by agriculture use in the desert-oasis ecotone in the middle of Heihe River Basin, North-west China".JOURNAL OF GEOCHEMICAL EXPLORATION 98.3(2008):57-64.

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