| 摘要: |
| 引入士壤离子扩散阻滞因子的概念，阐述了3种土壤离子扩散系数表达方式，即土壤离子孔隙扩散系数、土壤离子表现扩散系数、土壤离子有效扩散系数及其与离子自扩散系数之间的相互关系；明确了利用Fick第一扩散定律和Fick第二扩散定律推求的土壤离子扩散系数的类型和运算过程中有关参数的量纲。 |
| 关键词: 农业化学 土壤溶质运移 土壤物理 土壤养分 土壤离子扩散 |
| DOI： |
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| 基金项目:国家自然科学基金资助项目(499011009) |
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| Soil ion diffusion coefficients |
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| Abstract: |
| Using the retardation factor of soil ion diffusion transport,the relationships among three types of soil ion diffusion coefficients (the soil porous diffusion coefficient,the soil apparent diffusion coefficient,and the effective diffusion coefficient) and their connections with the ion self-diffusion coefficient in free solution are established.The dimension of parameters and the types of soil ion diffusion coefficients were calculated by Fick’s first law and Fick’s second law are identified. |
| Key words: agricultural chemistry soil solute transport soil physics soil nutrient soil ion diffusion |
