土壤水势温度滞后效应的研究  

Research on the Temperature Hysteretic Effect of Soil Water Potential

作　　者：王国栋[1] 张一平[1] 张君常 傅志东 

机构地区：[1]西北农业大学

出　　处：《水土保持研究》1996年第3期125-130,共6页Research of Soil and Water Conservation

摘　　要：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 soil water potential change range of four soils at different water contant with a rise and down in 10Cio 45℃ range was tested,and the results showed that the change depended on the prosess of change temperature, and appeared the temperature hysteretic effect of soil water potential, that the effect dscreased along with the water contant increased and increased in pace with the texture increased. That results were analysed with C. as the characteristic parameter of soil water potential temperature effect showed that the soil water potential temperature hysteretic effect was the inevitable outcome of the temperature effect,and the mechanism of the effect and the cause of production hysteretic was conducted preliminary study with the viscous coefficient temperature effect of soil water.

关 键 词：土壤水势 温度滞后效应 土壤温度 

分 类 号：S152.8[农业科学—土壤学]