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本文基于季节性冻土地区冻融期间自然冻融土壤的大田入渗试验，分析了田间耕作土壤的冻融特点；讨论了冻融土壤的减渗特性；探讨了冻融土壤的减渗机理。研究结果表明：在不同的冻融阶段，土壤冻层的形态、厚度、层数和层位不同，对入渗水流的控制和影响，不同；冻结土壤的减渗特性随冻融阶段的变化而变化；冻结条件下，土壤导水率的减小是其入渗能力减小的根本原因，而土壤液态水的相变是土壤导水率减小的根源所在。研究结果对于季节性冻土地区大田冻融土壤入渗规律的更深入的研究具有理论价值，对指导季节性冻土区冬春灌溉确定节水灌溉技术参数具有实际意义。
Based on the field infiltration experiments of natural frozen and thawed soils during seasonal freezing and thawing in the frozen region, the characteristics of freezing and thawing in field soil were analyzed. The infiltration characteristics of frozen-thawed soil were discussed. The results show that the control and influence of infiltration water flow are different at different stages of freezing and thawing. The shape, thickness, layer number and horizon of soil freezing layer are different. The infiltration characteristics of frozen soil vary with the stage of freezing and thawing The decrease of soil hydraulic conductivity under freezing condition is the basic reason for the decrease of infiltration capacity. The phase change of soil liquid water is the root of the reduction of soil hydraulic conductivity. The research results have theoretical value for the further research on infiltration law of frozen-thawed soils in seasonal permafrost region, and have practical significance to guide the technical parameters of winter-spring irrigation in seasonal frozen soil region.