土壤液土比对土娄土NH_4^+运移阻滞因子的影响  

Effects of solution/soil ratios on exchangeable NH_4^+ retardation factor

作　　者：王玉[1] 张一平[1] 

机构地区：[1]西北农林科技大学资源与环境学院,陕西杨陵712100

出　　处：《西北农林科技大学学报（自然科学版）》2002年第1期43-46,共4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 10 0 9);原西北农业大学青年基金资助项目

摘　　要：通过土娄土不同土壤液土比条件下 NH+4 饱和流运移试验 ,定量描述了土壤液土比对 NH+4 运移阻滞因子的影响。结果表明 ,土壤液土比由 0 .36 72增加到 0 .7134 ,相应的 NH+4 饱和流运移阻滞因子由 7.494减小到4.40 9,具有明显的土壤液土比效应 ;NH+4 饱和流运移阻滞因子与土壤液土比呈极显著线性负相关。The retardation factor is the important parameter of exchangeable solute transport,but the complete methods to obtain the retardarion factor are not available now.NH + 4 transport experiments with various solution/soil ratios under saturated flow were carried out,and the quantitative effects of the solution/soil ratio on the retardation factor have been studied.The results showed that the retardation factor of NH + 4 transport decreased significantly with increasing solution/soil ratios.As the solution/soil ratios increase from 0.367 2 to 0.713 4,the retardation factor decreases from 7.494 to 4.409.Statistically,it was significantly linearly negatively correlated with the solution/soil ratio.

关 键 词：土壤液土比 阻滞因子 LOU土 土壤交换性溶质运移 氨离子 

分 类 号：S153.5[农业科学—土壤学]