Study on Cation Exchange Capacity of Agricultural Soils

International Conference on Manufacturing Technology, Materials and Chemical Engineering

机械制造;材料科学;化学工业

Yunan, Dai^1 ; Xianliang, Qiao^1 ; Xiaochen, Wang^1

Dalian University of Technology, School of Environmental Science and Technology, China^1

关键词: Agricultural soils;    Cation exchange capacities;    Correlation coefficient;    Particle size composition;    Pearson correlation analysis;    Physical and chemical properties;    Positive correlations;    Prediction model;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/392/4/042039/pdf
DOI  :  10.1088/1757-899X/392/4/042039

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

100 agricultural soil samples from 23 provinces of China were collected, basic physical and chemical properties of soils, including cation exchange capacity(CEC), pH, organic matter(OM) and particle size composition (clay, silt and sand), were measured. The correlation among these physical and chemical properties was examined and a prediction model of CEC was established. The results showed that silt and sand parts were the main composition, and most of the soils are loam or clay loam. The pH values of soils range from 4.69 to 8.45. The level of OM is 9.75 g/kg∼150 g/kg; and CEC of soils range from 6.63 cmol/kg to 41.65 cmol/kg. Pearson correlation analysis showed that soil CEC, OM and clay, silt parts, have significant positive correlation, and the correlation coefficient are 0.457, 0.459, and 0.363(P2 of 0.415, which demonstrated better prediction than the models of previous studies.