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测定了陕西省四种主要土壤在不同含水量条件下，随温度升高和降低（在１０～４５℃范围内）水势的变化幅值．得到该值与变温过程有关，即呈现土壤水势温度滞后效应，此效应随含水量增大而减少，随质地加重而增大，选用Ｃψ作为供试土壤水势温度效应的特征参数进行分析，表明土壤水势温度滞后现象是土壤水势温度效应的必然结果，并动用土壤水粘滞系数的温度效应对土壤水势温度效应产生的机理及其滞后原因作了初步探讨。
The change amplitude of water potential of four main soils in Shaanxi Province under different water contents was measured with the increase of temperature and decrease (in the range of 10 ~ 45 ℃). This value is related to the process of temperature change, that is, the hysteresis effect of soil water potential is presented. This effect decreases with the increase of water content and increases with the increase of soil texture. C ψ is selected as the characteristic parameter of soil water potential temperature effect, The temperature hysteresis of water potential is the inevitable result of the temperature effect of soil water potential. The mechanism of temperature effect of soil water potential and the cause of its lag are discussed by using the temperature effect of soil water viscosity coefficient.