中文摘要：

以江西铜冶炼厂区域为例，运用地统计学采样和分析方法结合数理统计，研究了红壤丘陵区水稻土重金属复合污染的空间变异特征及其影响因素。结果表明，铜冶炼厂排污和污水灌溉导致了土壤Cu、Cd复合污染，其中Cu污染具有表聚性，Cd在0～60cm剖面中均引起污染。表层土壤与水稻秸秆和籽粒中全Cu含量间表现出极显著正相关，但Cd没有显著相关。地统计学分析表明，表层土壤Cu、Cd的空间变异主要发生在西南一东北方向，与地势的变化和灌溉渠的走向一致，也与常年风向相似。污染物排放、飘尘和灌溉是影响表层土壤重金属空间变异的主要因素，其次是土壤吸附性能。土壤pH值、有机质、孔隙性质影响了Cu的长期迁移过程．但对Cd迁移影响没有表现出显著相关性。

英文摘要：

The spatial variation of heavy metals in paddy soils was analyzed by geostatistical method. A case study area （2.6 km^2） around the Jiangxi Copper Smeltery was selected in Guixi City, Jiangxi Province, China. The discharge of copper smeltery and irrigation caused a combined pollution of Cu and Cd in soil and rice plant in the research area. Soil Cu pollution was mainly concentrated in the surface layer, but soil Cd pollution distributed over the 0-60 cm depth of soil profile. The remarkable positive correlation （P〈0.01） was found for Cu between surface soil layer and rice plant （rice straw and brown rice）, but not for Cd. The geostatistical analysis showed that azimuth angles in the long axis direction were 28.0° and 34.7° for Cu and Cd in soil surface layer respectively, indicating the main change occurred in NE-SW, coincident with the direction of topography, irrigation channel and similar to the perennial wind direction. The discharge and irrigation was the main reason to cause the spatial change of soil Cu and Cd. A positive correlation was also found between soil absorption capacity and contents of Cu and Cd in surface layer. Soil pH, organic matter and porosity had impact on the long-term transfer of Cu in deeper soil layer; however, their complex influence on Cd transfer process screened their individual impact and showed no obvious correlation.