气候变化领域集成服务门户(CCPortal): Soil salinity distribution and its relationship with soil particle size in the lower reaches of Heihe River, Northwestern China

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DOI	10.1007/s12665-016-5603-8
	Soil salinity distribution and its relationship with soil particle size in the lower reaches of Heihe River, Northwestern China
	Zhao, Yu; Feng, Qi; Yang, Huaide
发表日期	2016
ISSN	1866-6280
EISSN	1866-6299
卷号	75 期号:9
英文摘要	Recognition of the vertical and spatial distribution characteristics of soil salinity and its influencing factors have become a prerequisite for formulating strategies for the utilization and sustainable development of soil resources. The changes and characteristics of the particle size distribution (PSD) and its relationship with soil salinity were studied using the combined methods of laser diffraction analysis, the textural triangle and fractal analysis in the lower reaches of Heihe River, Northwestern China. The soil salinity showed clear surface accumulation characteristics. Soil salinity profiles in the area were classified into four types: Equably distribution profiles, bottom accumulation profiles, surface accumulation profiles, and oscillation profiles. In the study area, moderate salinized soil, heavy salinized soil and saline soil accounted for 5.71, 25.71, and 42.87 %, respectively. It was shown that soil salinization in the lower reaches of Heihe River is severe. Soil salinity and its spatial distribution is mainly controlled by SO42-, Cl-, Na+ + K+, Mg2+, and Ca2+. The soil texture of the topsoil can be classified as sand, sandy loam, silt loam, and silt. The silt and sand occupied the majority of the PDS at different soil depths. There was a decrease in soil salinity and soil particle size with increasing soil depth. The fractal dimension of PSD ranged from 2.503 to 2.555, the higher the sand content, the lower the fractal dimension. A considerable linear relationship also exists between the fractal dimension and the contents of soil clay, silt, sand and the soil salinity. Results show that the soil texture features dominated the soil salinity distribution.
关键词	Soil salinity Soil particle size distribution Fractal dimension Heihe River
学科领域	Environmental Sciences & Ecology; Geology; Water Resources
语种	英语
WOS研究方向	Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
来源期刊	ENVIRONMENTAL EARTH SCIENCES
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/111882
作者单位	Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Alashan Desert Ecohydrol Expt Res Stn, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Yu,Feng, Qi,Yang, Huaide. Soil salinity distribution and its relationship with soil particle size in the lower reaches of Heihe River, Northwestern China[J]. 中国科学院西北生态环境资源研究院,2016,75(9).
APA	Zhao, Yu,Feng, Qi,&Yang, Huaide.(2016).Soil salinity distribution and its relationship with soil particle size in the lower reaches of Heihe River, Northwestern China.ENVIRONMENTAL EARTH SCIENCES,75(9).
MLA	Zhao, Yu,et al."Soil salinity distribution and its relationship with soil particle size in the lower reaches of Heihe River, Northwestern China".ENVIRONMENTAL EARTH SCIENCES 75.9(2016).