| Salinity characteristics of soil profiles in the western lakeside of Bosten Lake, Xinjiang |
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| DOI：10.7606/j.issn.1000-7601.2014.04.027 |
| Key Words: soil salinity soil profiles lakeside Bosten Lake |
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| Abstract: |
| Taking western lakeside of Bosten Lake as study area, soil samples from different soil profiles in three seasons was collected, combined with the samples experiment and analysis to search the soil salinity characteristics. The research results showed that: (1) At the soil depth of 0 to 10cm, the average soil salinity content was 3.919 g·kg-1, the phenomenon of salt accumulated in the soil surface was strong; (2) In the vertical direction among the salt ions, the variation coefficient of Mg2+ was 1.034 with a bigger change, HCO3- a little change and its variation coefficient was 0.080; (3) Through the correlation analysis, it showed that sulfate and chloride were accumulated strongly in the topsoil, the correlation coefficient between SO42- and Na++K+ was 0.96, while the coefficient between Cl- and Mg2+ was 0.79, Cl- and Na++K+ was 0.72; (4) By contrast soil salt content in tamarisk profiles, the soil salinity showed obvious aggregation in the surface layer during two seasons in summer and autumn, the salt content in 0 to 10 cm soil depth accounted 27.37% and 21.88% of the total. But in spring, the soil salinity showed strong aggregation at the bottom of profile, the salt content in 90 to 100 cm layer was 21.53% of the
total; (5) Comparing soil salinity characteristics under different land cover, in the four land surface types as bare land, grassland, forestry land and cultivated land, the (Na++K+)∶Mg2+∶Ca2+ content weight radio were i
n turn as 85∶2.5∶1, 16∶2.5∶1, 9∶0.9∶1 and 10∶1.3∶1. In bare land, the content of Ca2+ was 0.104 g·kg-1，obviously higher than other land types. The content of Na++K+ was no any difference, the average content was 1.181 g·kg-1. In the grassland, the average content of Mg2+ was 0.081 g·kg-1，it was 4.4 times of the content of Mg2+ in bare land. |
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