乌鲁木齐市蔬菜基地土壤有效态镉的空间变异特征  

Spatial Variation of soil available Cd in Urumqi Vegetable Base

作　　者：杜萍萍 何丽[2] 王亚宇[3] 

机构地区：[1]乌鲁木齐市环境监测中心站,新疆乌鲁木齐830000 [2]新疆农业大学草业与环境科学学院,新疆乌鲁木齐830052 [3]a新疆轻工职业技术学院化学工程系,新疆乌鲁木齐830021

出　　处：《干旱环境监测》2011年第2期85-89,共5页Arid Environmental Monitoring

基　　金：新疆维吾尔自治区高校科学研究计划重点项目（XJEDU2005I08）

摘　　要：以乌鲁木齐市北郊蔬菜基地为典型区,对干旱区绿洲城市郊区土壤有效态镉含量的结构特征进行分析,得出该区有效态镉的空间分布格局,并揭示了引起这种分布格局的成因和污染来源。结果表明,乌鲁木齐市北郊蔬菜基地有效态镉属中等变异。半方差函数模型拟合表明,有效态镉含量可以用指数函数拟合,且在一定范围内存在空间相关性。采用Kriging最优内插法得到有效态镉含量的空间分布格局,表明土壤有效态镉含量与工业活动、污水灌溉和大气降尘密切相关。Based on typical vegetable base in Urumqi northern suburbs,structure characteristic of oasis city soil available Cd content in arid region was analyzed and spatial distribution was studied.The results showed that available Cd of vegetable base in Urumqi northern suburds was medium variations.Available Cd semivariance model fitted showed spatial correlation.Spatial distribution pattern of available Cd content was studied using Kriging optimal interpolation.Soil available Cd content had correlation with industry activity,savage irrigation and dustfall.

关 键 词：乌鲁木齐市 土壤镉 有效态 空间变异 

分 类 号：X53[环境科学与工程—环境工程]