新疆乌鲁木齐市城郊典型农田土壤镉污染及空间变异特征分析  

Analysis of Cd Pollution & Spatial Variability Characteristics of Typical Agricultural Soils in Suburbs of Urumqi City,Xinjiang

作　　者：郑春霞[1] 武红旗[1] 朱新萍[1] 贾宏涛[1] 

机构地区：[1]新疆农业大学草业与环境科学学院,新疆乌鲁木齐830052

出　　处：《光谱学与光谱分析》2012年第2期537-540,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(40901155);新疆自治区高校科学研究计划项目(XJEDU2009I17);土壤学新疆自治区重点学科;草业科学国家重点学科项目;自治区<土壤学>精品课程和校级<环境监测>精品课程项目资助

摘　　要：采用石墨炉(GF-990)原子吸收法对乌鲁木齐市北郊4个乡、南郊2个乡的农田土壤镉含量进行了检测,并利用地统计学法分析了镉含量的空间变异性。结果显示:北郊农田土壤取样点的镉含量超标,均属于中等空间变异或强变异,块金系数>75%,说明变量空间的自相关性比较弱,主要受到当地施肥、灌溉、耕作等外源污染的随机因素影响。南郊农田土壤取样点镉含量未超标,接近临界的警示值,块金系数50.2%,属于中等的空间自相关性。结果揭示了新疆乌鲁木齐市城郊农田土壤镉含量分布的空间变异特征,为该地区农田土壤镉污染源解析和治理提供科学的基础资料。Cd content in agricultural soils from 4 townships in north suburb and 2 townships in south suburb of Urumqi City was determined with graphite furnace（GF-990） atomic absorption spectrometry,and the spatial variability of Cd content there was analyzed with geo-statistics method.The result indicates that Cd content from the sampling points in north suburb exceeds the stipulated standard and falls into medium or strong spatial variability with nugget value 75%,which explains a weak self-correlation among those variable spaces under mainly the impact of random factors of external pollution such as local fertilization level,irrigation and cultivation etc.Cd content from the sampling points in north suburb does not exceed the stipulated standard but approaches to the critical warning value with nugget value at 50.2%,which falls into medium self-correlation among those variable spaces.Spatial variability characteristics of Cd distribution in suburban agricultural soils of Urumqi City,Xinjiang were studied in this paper for providing scientific basic data to source analysis and control of Cd pollution in the far mLands there.

关 键 词：土壤 镉污染 空间变异 

分 类 号：O657.3[理学—分析化学]