中文摘要：

土壤热容量是土壤热性质的重要参数之一．通过试验和分析，研究了地面土壤含水量日变化及含水量垂向分布变化规律，以及不同含水量对土壤温度的日变化影响．试验结果表明，土壤水分的运动和土壤中热量的传输是一个统一不可分割的系统，无地面水分补给时，土壤中的含水量变化与地温的日变化有关，土壤水的热运动是土壤层向蒸发面供水的最重要的因素之一．

英文摘要：

The thermal capacity is one of the important parameters to reflect the thermal property of soil. The regularities of daily variation of water content and the variation of its vertical distribution as well as the effect of water content on daily variation of soil temperature were studied based on experimental analysis. The result shows that the moisture movement and heat transfer in soil is a unified and indivisible system, that the variation of soil water content is closely related to the daily variation of soil temperature under the condition of no surface water recharge, and that heat transfer in soil water is one of the most important influencing factors on water supply from soil layer to evaporation surface.