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| Variations in soil salt ions along a water and salinity gradient in the Yellow River Delta, China |
| Received:December 06, 2018 |
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| KeyWord:soil salinity;salt ions;water and salinity gradient;the Yellow River Delta;coastal wetlands |
| Author Name | Affiliation | E-mail | | ZHAO Qing-qing | Ecology Institute, Qilu University of Technology(Shandong Academy of Sciences), Shandong Provincial Key Laboratory of Applied Microbiology, Ji'nan 250103, China
State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China | | | BAI Jun-hong | State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China | junhongbai@163.com | | GAO Yong-chao | Ecology Institute, Qilu University of Technology(Shandong Academy of Sciences), Shandong Provincial Key Laboratory of Applied Microbiology, Ji'nan 250103, China | | | WANG Lei-lei | Ecology Institute, Qilu University of Technology(Shandong Academy of Sciences), Shandong Provincial Key Laboratory of Applied Microbiology, Ji'nan 250103, China | | | ZHENG Li-wen | Ecology Institute, Qilu University of Technology(Shandong Academy of Sciences), Shandong Provincial Key Laboratory of Applied Microbiology, Ji'nan 250103, China | | | WANG Jia-ning | Ecology Institute, Qilu University of Technology(Shandong Academy of Sciences), Shandong Provincial Key Laboratory of Applied Microbiology, Ji'nan 250103, China | | | ZHANG Shu-yan | Management Station of the Yellow River Mouth, National Nature Reserve of the Yellow River Delta, Dongying 257500, China | |
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| Abstract: |
| Soil samples were collected to a depth of 50 cm in the Yellow River Delta Nature Reserve, including Calamagrostis pseudophragmites wetlands (S1), Typha orientalis wetlands (S2), Phragmites australis wetlands (S3), Tamarix chinensis and Suaeda salsa wetlands (S4) and Suaeda salsa wetlands (S5), along a gradient of water and salinity in four seasons of 2014. Soil electrical conductivity (EC) and the concentrations of six salt ions (Na+, K+, Ca2+, Mg2+, Cl- and SO42-) were analyzed to investigate the effects of water and salinity gradient on soil salinity. The results showed that soil EC, Na+, K+, and Cl- in Suaeda salsa wetlands were significantly higher than those in the other wetlands (P<0.05), while the highest value of Mg2+, Ca2+, and SO42- occurred in Tamarix chinensis and Suaeda salsa wetland soils. Along the 0~50 cm soil profile, soil EC and salt ions showed different trends. Soil EC was linearly and significantly positively correlated with six salt ions (P<0.05). Furthermore, strong variability was observed in soil EC and salt ions in five wetlands. Our results indicated that soil EC and six salt ions increased along the water and salinity gradient from the Yellow River to the sea, and soil EC was mainly affected by the changes of Na+ and Cl-. |
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