Process / pipelineSoil Chemistry
阳离子交换量
阳离子交换量(CEC)是一项基本土壤性质,用于衡量土壤保持和释放植物根系可利用的带正电营养离子(阳离子:K⁺, Ca²⁺, Mg²⁺, Na⁺, H⁺, Al³⁺)的能力。CEC反映了土壤中粘土矿物和有机质的数量及类型——这些物质带有吸引并暂时结合阳离子的带负电表面位点。高CEC的土壤能更持久地保持养分,减少施肥频率;低CEC的土壤则会通过淋溶迅速流失养分。
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来源
- Thomas, G. W. (1982). Exchangeable cations. In A. L. Page, R. H. Miller, & D. R. Keeney (Eds.), Methods of soil analysis. Part 2: Chemical and microbiological properties (2nd ed., pp. 159-165). American Society of Agronomy. link ↗
- Sumner, M. E., & Miller, W. P. (1994). Cation exchange capacity and exchange coefficients. In R. A. Feet (Ed.), Methods of soil analysis (3rd ed., pp. 1201-1229). American Society of Agronomy. link ↗
- Bouldin, D. R., & Thorne, M. (1997). Charge and non-charge effects on cation exchange reactions in soils. Soil Science Society of America Journal, 61(1), 25-32. link ↗
如何引用本页
ScholarGate. (2026, June 3). Cation Exchange Capacity (CEC) Measurement and Interpretation. ScholarGate. https://scholargate.app/zh/agronomy/cation-exchange-capacity
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