摘要
引入土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、土壤离子表观扩散系数、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。
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 Ficks first law and Ficks second law are identified.
出处
《西北农林科技大学学报（自然科学版）》
CSCD
北大核心
2003年第2期89-91,共3页
Journal of Northwest A&F University(Natural Science Edition)
基金
国家自然科学基金资助项目 (4 990 110 0 9)
关键词
扩散系数
扩散阻滞因子
土壤溶质运移
土壤离子扩散
agricultural chemistry
soil solute transport
soil physics
soil nutrient
soil ion diffusion
