干旱区生态环境知识资源中心(Arid): Spatial distribution of soil salinity and potential implications for soil management in the Manas River watershed, China

Arid

DOI	10.1111/sum.12539
	Spatial distribution of soil salinity and potential implications for soil management in the Manas River watershed, China
	Wang, Jianyong 1,2; Liu, Yingxia 1; Wang, Shaoming 3; Liu, Huiming 4; Fu, Guangqiang 1; Xiong, Youcai 1
通讯作者	Wang, Jianyong ; Xiong, Youcai
来源期刊	SOIL USE AND MANAGEMENT
ISSN	0266-0032
EISSN	1475-2743
出版年	2020
卷号	36 期号:1 页码:93-103
英文摘要	Understanding the watershed-scale spatial distribution of soil salinity and its compositions is important for soil management. Here, we present the first study on the Manas River watershed in northwest China. In this study, we took soil samples in upper 20 cm of soil from 186 locations across the watershed and measured total salt concentration (TSC), salt ion composition and soil particle size distribution (PSD). We found that on average topsoil TSC tended to increase, from 3.55 g kg(-1) in upstream regions to 19.40 g kg(-1) in downstream regions. The stoichiometric analysis showed that the equivalence ratio of soil Cl- to SO42- increased from 0.53 in upstream regions to 2.12 in midstream regions, and further to 3.76 in downstream regions; thus, the soil types were classified into chloride-sulfate, sulfate-chloride and chloride soils types, respectively. Additionally, proportions of small (<2 mu m in diameter) and large (>2,000 mu m) soil particles increased, while that of medium sizes (2-50 mu m) decreased from upstream to downstream, with an increasing coefficient of variance (CV) in PSD. Taken together, watershed-scale topsoil salinity may be horizontally characterized by increased TSC and Na+ & Cl- proportions, greater equivalence ratio of Cl- vs. SO42- and more balanced distribution of PSD along with surface water flow. Results demonstrated that soil salinity and its ions compositions showed a great variation across the watershed scale, suggesting that soil management may consider the spatial heterogeneity of saline-alkaline soil types, and our results provided scientific guidance for local soil management and restoration.
英文关键词	Cl- to SO42- ratio differentiated sequestration Manas River watershed particle size distribution saline soil soil types
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000485920800001
WOS关键词	PARTICLE-SIZE DISTRIBUTION ; SALT-AFFECTED SOILS ; LAND-USE CHANGE ; BASIN ; OASIS ; XINJIANG ; REGION ; VARIABILITY ; PATTERN ; FRACTIONS
WOS类目	Soil Science
WOS研究方向	Agriculture
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/2XILL650/218890
作者单位	1.Lanzhou Univ, Sch Life Sci, State Key Lab Grassland Agroecosyst, Lanzhou, Gansu, Peoples R China; 2.Northeast Normal Univ, Inst Grassland Sci, Key Lab Vegetat Ecol, Minist Educ, Changchun, Jilin, Peoples R China; 3.Shihezi Univ, Coll Life Sci, Shihezi, Peoples R China; 4.Minist Environm Protect China, Ecol Remote Sensing Dept, Satellite Environm Ctr, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Wang, Jianyong,Liu, Yingxia,Wang, Shaoming,et al. Spatial distribution of soil salinity and potential implications for soil management in the Manas River watershed, China[J]. 兰州大学,2020,36(1):93-103.
APA	Wang, Jianyong,Liu, Yingxia,Wang, Shaoming,Liu, Huiming,Fu, Guangqiang,&Xiong, Youcai.(2020).Spatial distribution of soil salinity and potential implications for soil management in the Manas River watershed, China.SOIL USE AND MANAGEMENT,36(1),93-103.
MLA	Wang, Jianyong,et al."Spatial distribution of soil salinity and potential implications for soil management in the Manas River watershed, China".SOIL USE AND MANAGEMENT 36.1(2020):93-103.