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Field-Scale Spatial Variation of Saline-Sodic Soil and Its Relation with Environmental Factors in Western Songnen Plain of China

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  • Fan Yang

    (Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, 3195 Weishan Road, Changchun 130012, China)

  • Guangxin Zhang

    (Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, 3195 Weishan Road, Changchun 130012, China)

  • Xiongrui Yin

    (Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, 3195 Weishan Road, Changchun 130012, China
    Songliao Water Resources Commission, Ministry of Water Resources, Changchun 130021, China)

  • Zhijun Liu

    (Dynamic Solutions, LLC, Knoxville, TN 37919, USA)

Abstract

The objectives of this study were to investigate the degree of spatial variability and variance structure of salinization parameters using classical and geostatistical method in Songnen Plain of China, which is one of largest saline-sodic areas in the World, and to analyze the relationship between salinization parameters, including soil salinity content (SC), electrical conductivity (EC), sodium adsorption ratio (SAR), and pH, and seven environmental factors by Pearson and stepwise regression analysis. The environmental factors were ground elevation, surface ponding time, surface ponding depth, and soil moistures at four layers (0–10 cm, 10–30 cm, 30–60 cm, and 60–100 cm). The results indicated that SC, EC, and SAR showed great variations, whereas pH exhibited low variations. Four salinization parameters showed strongly spatial autocorrelation resulting from the compound impact of structural factors. The empirical semivariograms in the four parameters could be simulated by spherical and exponential models. The spatial distributions of SC, EC, SAR and pH showed similar patterns, with the coexistence of high salinity and sodicity in the areas with high ground elevation. By Pearson analysis, the soil salinization parameters showed a significant positive relationship with ground elevation, but a negative correlation with surface ponding time, surface ponding depth, and soil moistures. Both correlation and stepwise regression analysis showed that ground elevation is the most important environmental factor for spatial variation of soil sanilization. The results from this research can provide some useful information for explaining mechanism of salinization process and utilization of saline-sodic soils in the Western Songnen Plain.

Suggested Citation

  • Fan Yang & Guangxin Zhang & Xiongrui Yin & Zhijun Liu, 2011. "Field-Scale Spatial Variation of Saline-Sodic Soil and Its Relation with Environmental Factors in Western Songnen Plain of China," IJERPH, MDPI, vol. 8(2), pages 1-14, January.
    • Handle: RePEc:gam:jijerp:v:8:y:2011:i:2:p:374-387:d:11207
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    References listed on IDEAS

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    1. Zhou, H.H. & Chen, Y.N. & Li, W.H., 2010. "Soil properties and their spatial pattern in an oasis on the lower reaches of the Tarim River, northwest China," Agricultural Water Management, Elsevier, vol. 97(11), pages 1915-1922, November.
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