焉耆盆地土壤盐分剖面特征及其与土壤颗粒组成的关系

杜金龙; 靳孟贵; 欧阳正平; 刘延锋

Volume 33 Issue 1

Jan. 2008

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Article Navigation > Earth Science > 2008 > 33(1): 131-136

DU Jin-long, JIN Meng-gui, OUYANG Zheng-ping, LIU Yan-feng, 2008. Characteristics of Soil Salinity Profiles and Relationship between Salinity and Soil Particle Composition in Yanqi Basin of Xinjiang, China. Earth Science, 33(1): 131-136.

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Characteristics of Soil Salinity Profiles and Relationship between Salinity and Soil Particle Composition in Yanqi Basin of Xinjiang, China

Faculty of Environmental Studies, China University of Geosciences, Wuhan 430074, China

Received Date: 2007-06-25
Publish Date: 2008-02-25

Abstract

Abstract

To understand the distribution pattern of salinity in soil profiles and factors influenced, soil samples were collected from irrigated areas of Yanqi basin and tested for total salinity and soil particle composition, and then the relationship between salinity and particle composition was studied using the Spearman rank correlation analysis. Based on the analysis, soil salinity profiles in the area are classified into three types: equably distribution profiles (EDP), surface accumulation profiles (SAP) and oscillation profiles (OP). EDP are featured with the lowest and equal distribution of salinity; SAP are characterized by the most obvious soil surface salinity accumulation (accumulation coefficient is 4.20), OP by the highest salinity and the largest coefficient of variation (82.4%). Silty loam is the most common textural class (70.8% in all soil samples) and silt is the highest particle-size fraction of soil samples (mean content is 57.1%). In EDP the correlation coefficient of salinity with clay content (0.560) is the highest, and the positive correlation of them is extremely significant. In OP the correlation coefficient of salinity with sand content (-0.639) is the highest, and the negative correlation of them is extremely significant. In SAP the salinity is not obviously correlated with soil particle composition. Considering the existing areas of EDP and OP, it is found that soil salinity is mainly affected by the clay content in the non-salinization area with relatively lower salinity and sand content, and whereas it is mainly affected by the sand content in the salinization area with relatively higher salinity and sand content.
- soil salinity profile,
- soil particle composition,
- Spearman rank correlation,
- Yanqi basin.

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References

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Characteristics of Soil Salinity Profiles and Relationship between Salinity and Soil Particle Composition in Yanqi Basin of Xinjiang, China

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