重庆地区紫色土壤镉有效性水平及分异特性研究  

Study on the Available Cd Level of Purple Soil and Its Differentiation Characteristics in Chongqing

作　　者：程永毅[1] 李忠意[1] 陈杰华[1] 杨丽军 李尧琴 杨剑虹[1] 

机构地区：[1]西南大学资源环境学院,重庆400716 [2]重庆市万州农产品质量安全监督检测中心,重庆万州400040

出　　处：《西南大学学报（自然科学版）》2012年第1期85-91,共7页Journal of Southwest University(Natural Science Edition)

基　　金：国家支撑计划项目"高效施肥关键技术研究与示范--土壤养分高效测试关键技术研究课题"(2008BADA4B01)

摘　　要：通过对重庆地区不同紫色地层发育的紫色土壤系统采样分析有效态镉的含量、影响因素和分异特征,结果表明:有效镉的含量水平和分异值大小顺序为紫色潮土,棕紫泥土,暗紫泥土,灰棕紫泥土,红棕紫泥土,并且显著大于全国背景值0.079mg/kg;通径分析与有效镉影响因子大小顺序为有效Fe,有效Mn,有机质,有效Pb,有效Zn,有效Cu;与有机质和有效Cu,Zn,Fe,Mn,Pb含量呈极显著乘幂关系(r=0.406～0.545);在p=0.01水平,有效Cd与pH值呈极显著指数关系(r=0.406),并且淹水利用使土壤镉有效性提高.Samples were taken from the purple soil at different purple strata of the soil profile in Chonqing and their available Cd content and the differentiation characteristics were analyzed.The results show that available cadmium content and differentiation of Cd of the soil samples was significantly higher than the national background value 0.079 mg/kg,and appeared in the order of purple tide soil brown purple clay dark purple soil gray-brown purple soil red brown purple soil.Path analysis demonstrated that the order of the impacting factors for available Cd was：available Fe available Mn organic matter available Pb available Zn available Cu（p=0.01）,that available Cd content was in a highly significant power relationship with the content of organic matter,available Cu,available Zn,available Fe,available Mn and available Pb（r=0.406～0.545）,that available Cd and pH were in a highly significant exponential relationship（r=0.406）,and that flooding could improve the availability of cadmium in soil.

关 键 词：紫色土壤 有效镉 影响因子 分异特性 

分 类 号：X53[环境科学与工程—环境工程]