Spatial variations of concentrations of copper and its speciation in the soil-rice system in Wenling of southeastern China

摘要: Copper (Cu) is one of the essential elements for plant growth, while excessive Cu in soils has potential environmental risks. There little information on spatial variation practical paddy fields. This now important appropriate agricultural management. The patterns Cu, its fractions soils, and concentrations rice were investigated a typical production region—Wenling southeastern China. A total 96 pairs grain soil samples (0–15 cm) collected. concentration very variable, with large skewness, kurtosis, coefficient (CV) values. Compared to guideline value (50 mg kg−1), pollution fields was observed study area. All measured lower than 10 kg−1, suggesting that they remained at safe level. Spatial analyses including Moran’s I index geostatistics results indicated high-high both found northwest part, which mainly related industrial E-waste dismantling activities. low-low soil-rice system located south part cross-correlogram significantly spatially correlated fractions, organic matter (SOM), but negatively pH electrical conductivity (EC). Most selected variables had clear correlation range rice. ranges significant (p < 0.05) could be obtained further used dividing management zones.