湿润季风气候条件下芒硝矿区土壤盐分空间分布特征  

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

作　　者：张俊思[1] 徐薇涵 袁大刚[1] 张潇[1] 王昌全[1] 

机构地区：[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

出　　处：《山地学报》2016年第2期157-164,共8页Mountain Research

基　　金：国家自然科学基金资助项目(41371230;40801079)~~

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 m S/cm,其平均值为0.41 m S/cm。TWSS在0.48~5.93 g/kg,阴离子以SO_4^(2-)和HCO_3^-为主,阳离子以Ca^(2+)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_4^(2-)、Ca^(2+)和Na^+的影响。2.土壤EC、TWSS和HCO_3^-、SO_4^(2-)、NO_3^-、Ca^(2+)、K^+、Na^+具有强烈空间相关性;Cl^-和Mg^(2+)具有中等空间相关性,说明EC、TWSS、HCO_3^-、SO_4^(2-)、NO_3^-、Ca^(2+)、K^+和Na^+受结构性因素的影响大,Cl^-和Mg^(2+)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_4^(2-)、Mg^(2+)和Ca^(2+)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。The feature-spatial distribution of the total water-soluble salt （TWSS） , anion and cation in certain mi- rabilite area of D were as follows： content of TWSS anling County,Sichuan, China was studied by ArcGIS and geostatistics in this paper. The results The mean value of EC was 0.41 mS/cm, which ranged from 0.06 mS/cm to 2.38 mS/cm. ranged from 0. 48 g/kg to 5.93 g/kg; Predominant salts of anion in the soil were SO] The and HCO3-, 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 SO2- , Ca2＋ and Na ＋. What＇ s more, EC, HCO3- , SOl-, NO3- , Ca2＋ , K＋ , Na＋ and TWSS had strong spatial correlations, C1- and Mg2＋ had moderate spatial correlations, which revealed that EC, TWSS, HCO3- , SOl- , NO3- , Ca2＋ , K＋和 Na＋ were influenced by structural factors, and the spatial distributions of C1- and Mg2＋ were the result of cooperation among structural fac- tors 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 HCO3- , SO2- , 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 mi- rabilite area but also appeared in the northern region. The contents of C1- and NO3- 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.

关 键 词：芒硝矿区 土壤盐分 空间分布 

分 类 号：S156.4[农业科学—土壤学]