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通过田间原状土和回填土渗透比较试验,揭示了大孔隙对水及溶质在土壤中运移的影响。通过回填土和原状土中含水率实验结果比较分析,指出回填土和原状土含水率的变化呈现不同分布特征。而对回填土和原状土中溶质浓度实验结果分析比较,发现回填土中水分运动和溶质运移的速度显著低于原状土,回填土和原状土都有位置深的检测点先于其上面的检测点出现溴离子的现象,回填土中硝酸根离子的浓度远低于其在原状土相应深度的浓度。
Through the comparative experiments of infiltration of undisturbed soil and backfill soil in the field, the influence of macropores on water and solute transport in soil was revealed. Through the comparison and analysis of the experimental results of the water cutoff between the backfill soil and the undisturbed soil, it is pointed out that the changes of the moisture content of the backfilled soil and undisturbed soil show different distribution characteristics. However, the comparison of the experimental results of solute concentration in backfill soil and undisturbed soil shows that the water movement and solute transport velocity in backfill soil are significantly lower than those of undisturbed soil. Both the backfill soil and the undisturbed soil have a deeper detection point than the top Bromide ions are detected at the detection point. The concentration of nitrate ions in backfill soil is much lower than the corresponding concentration in undisturbed soil.