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湿润季风气候条件下芒硝矿区土壤盐分空间分布特征()

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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:: 2016年02期

页码:: 157-164

栏目:: 山地生态与环境

出版日期:: 2016-04-01

文章信息/Info

Title:: Spatial Distribution of Soil Salinity in the Mirabilite Area under the Humid Monsoon Climate Condition

作者:: 张俊思¹; 徐薇涵¹; 2; 袁大刚^1*; 张潇¹; 王昌全¹; 1.四川农业大学资源环境学院,四川成都 611130; 2.兴文县国土资源局,四川兴文 644400

Author(s):: ZHANG Junsi¹; XU Weihan¹; 2; YUAN Dagang¹; ZHANG Xiao¹; WANG Changquan¹; 1.College of Resource and Environment, Sichuan Agricultural University, Chengdu 611130, China; 2. Xinwen Bureau of Land and Resources,Sichuan Xinwen 644400, China

关键词:: 芒硝矿区; 土壤盐分; 空间分布

Keywords:: Mirabilite area; soil salinity; spatial distribution

分类号:: S156.4

DOI:: 10.16089/j.cnki.1008-2786.000113

文献标志码:: A

摘要:: 以ArcGIS和地统计学为平台,研究四川盆地西南边缘丹棱县某芒硝矿区土壤EC、水溶性盐总量(TWSS)及其阴阳离子的空间分布特征。结果表明:1.研究区土壤EC在0.06～2.38 mS/cm,其平均值为0.41 mS/cm。TWSS在0.48～5.93 g/kg,阴离子以SO^2-₄和HCO^-₃为主,阳离子以Ca²⁺和Na⁺为主,为硫酸盐-苏打型; EC与TWSS呈极显著正相关关系,它们均受到钙芒硝矿主要成分SO^2-₄、Ca²⁺和Na⁺ 的影响。2.土壤EC、TWSS和HCO^-₃、SO^2-₄、NO^-₃、Ca²⁺、K⁺、Na⁺具有强烈空间相关性; Cl^-和Mg²⁺具有中等空间相关性,说明EC、TWSS、HCO^-₃、SO^2-₄、NO^-₃、Ca²⁺、K⁺和Na⁺受结构性因素的影响大,Cl^-和Mg²⁺的空间分布是结构性因素和随机因素共同作用的结果。3.土壤TWSS的空间分布呈从矿区向周围递减的特征,HCO^-₃、SO^2-₄、Mg²⁺和Ca²⁺含量的高值区均出现在矿区附近,EC和Na⁺含量的高值区不仅出现在矿区附近还出现在北部区域; Cl^-和NO^-₃的含量呈从南到北递增的趋势。根据盐渍化分级标准,研究区土壤盐渍化样点数占总样点数的44.23%,而面积占总面积的53.25%,应采取相应措施进行修复与治理。

Abstract:: The feature-spatial distribution of the total water-soluble salt(TWSS), anion and cation in certain mirabilite area of Danling County,Sichuan,China was studied by ArcGIS and geostatistics in this paper. The results were as follows: The mean value of EC was 0.41 mS/cm, which ranged from 0.06 mS/cm to 2.38 mS/cm. The content of TWSS ranged from 0.48 g/kg to 5.93 g/kg; Predominant salts of anion in the soil were SO^2-₄ and HCO^-₃, and predominant salts of cation were Ca²⁺ and Na⁺, which could be considered as a sulfate-soda-type. EC and TWSS had a significantly positive correlation, and they were affected by SO^2-₄, Ca²⁺ and Na⁺. What's more, EC, HCO^-₃, SO^2-₄, NO^-₃, Ca²⁺, K⁺, Na⁺ and TWSS had strong spatial correlations, Cl^- and Mg²⁺ had moderate spatial correlations, which revealed that EC, TWSS, HCO^-₃, SO^2-₄, NO^-₃, Ca²⁺, K⁺和Na⁺ were influenced by structural factors, and the spatial distributions of Cl^- and Mg²⁺ were the result of cooperation among structural factors and random factors. Spatial distribution of the TWSS had the trend that the value near the mirabilite area was higher than that of farther away from the mirabilite area. The high content areas of HCO^-₃, SO^2-₄, Mg²⁺ and Ca²⁺ were in the vicinity of the mirabilite area. The high content areas of EC and Na⁺ not only in the vicinity of the mirabilite area but also appeared in the northern region. The contents of Cl^- and NO^-₃ increased from south to north. According to the grading standards of salinization, sampling points which had salinized accounted for 44.23% of the total sampling points in the study area, and salinized soil areas accounted for 53.25% of the total areas, and appropriate measures should be taken to restore and control.

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备注/Memo

备注/Memo:: 收稿日期(Received date):2014-06-12; 修回日期(Accepted):2014-09-03。基金项目(Foundation item):国家自然科学基金资助项目(41371230; 40801079)。[Supported by National Nature Science Foundation of China(41371230; 40801079)] 作者简介(Biography):张俊思(1990-),女,四川成都人,硕士研究生,主要从事土壤资源可持续利用研究。[Zhang Junsi(1990-), female, was born in Chengdu, Sichuan Province, graduate student, mainly engaged in the study of sustainable use of soil resources. ] E-mail: 1158016014@qq.com *通信作者(Corresponding author):袁大刚(1975-),男,博士,副教授,主要从事土壤资源可持续利用研究。[Yuan Dagang(1975-), male, Dr & Associate professor, mainly engaged in the study of sustainable use of soil resources.] E-mail: gangday@sohu.com

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