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本文根据Ｐｈｉｌｉｐ、ＤｅＶｒｉｅｓ和Ｍｉｌｌｙ的多孔介质中水、汽、热传递的理论，给出了冬小麦苗期松土耕作时的土壤内水热分布的耦合模型，将其数值解结果与实测值进行了对比验证，表明该模型较准确地模拟了土壤水热动态。对土壤内水分动态的模拟表明，松土时土壤内水汽流动在整体水分流动中所占比例较小，但用等温模型与水、汽、热耦合模型模拟，仅开始时用等温模型简化对水分流动的差异较小，随着进一步蒸发，差异将较大，需考虑水汽运动的热效应。因此，在松土保墒条件下，连续蒸发时用非等温模型模拟土壤水分运动状态是十分必要的。
According to the theory of water, vapor and heat transfer in porous media of Philip, DeVries and Milly, the coupling model of soil water and heat distribution during the tillage of winter wheat is presented. The numerical solution and the measured values The comparison verifies that the model simulates the hydrothermal behavior of soil more accurately. The simulation of soil water dynamics shows that the soil moisture flow in the soil is only a small proportion of the overall water flow when soil is loosened. However, with isothermal model and water, steam and heat coupling model simulation, only the beginning of isothermal model simplifies the water The difference in flow is small, with further evaporation, the difference will be greater, considering the thermal effects of the water vapor movement. Therefore, it is necessary to simulate soil water movement with non-isothermal model under the conditions of soil moisture conservation and continuous evaporation.