云南土壤钴背景值及其特征初探

Preliminary research on characteristics and background value of cobalt in soil in Yunnan

云南土壤钴含量呈对数正态分布,背景值高于全国,比较高的是石灰土、水稻土、红壤,比较低的是黄棕壤、砖红壤、亚高山草甸土。云南土壤的水平地带和垂直地带钴背景值分布有着明显的变化规律;由于成土母质母岩的不同,土壤中的钴背景值有明显的差异;发育于不同成土母质母岩的红壤,钴背景值也有很大差异;发育于同种成土母质母岩上的不同土类的钴背景值也有差异;土壤钴背景值在滇中和滇西北局部地区较高。

The cobalt content in Yunnan soil is log normal distribution and its background value is higher than that of China. Background values of lime soil, paddy soil, and red soil are comparatively high and those of yellowish brown soil, brick red soil, and sub-plateau meadow soil are comparatively low. Cobalt background value is distributed in an apparent and regular order vertically and horizontally. Due to differences between original rocks,cobalt background values in soil differ apparently. The difference also presents in red soil with different original rock development and in different types of soil within the same original rock development. Soil cobalt background values are high in middle and northwest part of Yunnan province.