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采用一维饱和稳定流易混置换试验,用Cl-和K+为对象模拟黄土高原地区4种典型土壤对养分运移阻滞因子R的影响。试验结果表明对于不同质地的土壤,随着土壤质地变细,运移阻滞因子增大;对于同种质地土壤,随着容重增加,运移阻滞因子增大;对于同种质地而粒级不同的土壤,运移阻滞因子随着粒级的增大而增大;受土壤排斥的离子较受土壤吸引的离子容易穿透土壤。
Using one-dimensional saturated and stable flow-prone mixture exchange test, the effect of four typical soils on nutrient transport retardation factor R was simulated using Cl- and K +. The results showed that for different soil texture, the migration retardation factor increased with the soil texture thinning. For the same texture soil, the migration retardation factor increased with the increase of bulk density. For the same texture, In different soils, the migration retardation factor increases with the increase of grain size. The ions rejected by the soil tend to penetrate the soil more easily than the ions attracted by the soil.