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Authors Chi, CM; Wang, ZC
Author Full Name Chi, Chun-Ming; Wang, Zhi-Chun
Title Characterizing Salt-Affected Soils of Songnen Plain Using Saturated Paste and 1:5 Soil-to-Water Extraction Methods
Source ARID LAND RESEARCH AND MANAGEMENT
Language English
Document Type Article
Author Keywords electrical conductivity (EC); Na plus concentration; sodium adsorption ratio (SAR); total cation concentration (TCC)
Abstract In the Songnen Plain, Northeast China, chemical parameters of salt-affected soils were previously obtained from 1:5 soil-to-water (1:5) extracts so that there is no information available for soil salinity and sodicity from the saturated paste (SP) extracts. The work reported here characterized soil salinity and sodicity of SP extracts and compared salinity and sodicity measurements using SP and 1:5 extraction methods from 121 soil samples from various sites of salt-affected soil areas in the Songnen Plain. Electrical conductivity (EC), major cations (Na+, K+, Mg2+, Ca2+), sodium adsorption ratio (SAR), and pH were determined and analyzed using SP extracts and 1:5 extracts. The sodium ion was the predominant cation so that Na+ concentration was close to total cation concentration (TCC). The SAR in the 121 samples was remarkably high; 22 soils had a SAR1000 (mmolcL-1)1/2 with a maximum SAR value of 4042.57 (mmolcL-1)1/2 for SP extract. The SAR was highly correlated with EC (r20.86, P0.0001). The salt-affected soils are predominantly saline-sodic based on the classification of the USDA (1954). Through a regression analysis, total cation concentration was strongly related to EC with slopes of 10.3 and 9.8 without y intercept in SP and 1:5 extracts, respectively. Significant relationships (r20.81, P0.0001) existed between EC, Na+, and SAR in SP and 1:5 extracts. However, K+, Ca2+, and Mg2+ of SP extracts was not related to those of 1:5 extracts.
Author Address [Chi, Chun-Ming; Wang, Zhi-Chun] Chinese Acad Sci, NE Inst Geog & Agroecol, Changchun 130012, Jilin Province, Peoples R China; [Chi, Chun-Ming] Chinese Acad Sci, Grad Univ, Beijing, Peoples R China
Reprint Address Wang, ZC (corresponding author), Chinese Acad Sci, NE Inst Geog & Agroecol, 3195 Weishan Rd, Changchun 130012, Jilin Province, Peoples R China.
E-mail Address wangzhichun@neigae.ac.cn
Funding Agency and Grant Number Ministry of Science & Technology of China Fund; Chinese Academy of Sciences FundChinese Academy of Sciences; Northeast Institute Geography and Agroecology, CAS Fund
Funding Text This research was supported by the Ministry of Science & Technology of China Fund, Chinese Academy of Sciences Fund, and the Northeast Institute Geography and Agroecology, CAS Fund.
Times Cited 58
Total Times Cited Count (WoS, BCI, and CSCD) 62
Publisher TAYLOR & FRANCIS INC
Publisher City PHILADELPHIA
Publisher Address 530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USA
ISSN 1532-4982
29-Character Source Abbreviation ARID LAND RES MANAG
ISO Source Abbreviation Arid Land Res. Manag.
Year Published 2010
Volume 24
Issue 1
Beginning Page 1
Ending Page 11
Article Number PII 918159563
Digital Object Identifier (DOI) 10.1080/15324980903439362
Page Count 11
Web of Science Category Environmental Sciences; Soil Science
Subject Category Environmental Sciences & Ecology; Agriculture
Document Delivery Number 539GD
Unique Article Identifier WOS:000273240900001
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