中文摘要：

以陕北风沙土为研究对象,比较了微型蒸渗仪高度（10、15、20和25 cm）、内径（10和15 cm）和封底材料（薄铁皮和细纱布）对土壤蒸发测定结果的影响。结果表明,不同规格蒸渗仪测定的土壤蒸发量具有很好的相关性。当内径为10 cm时,土壤蒸发量的测定值随高度的增加而增加,高度为20 cm时的测定值显著大于10 cm时。当高度为10 cm时,将内径由10 cm增加至15 cm对土壤蒸发的测定没有显著影响。高度和内径一定时,将封底材料由薄铁皮换为细纱布时测定的土壤蒸发量显著增加。高度为20 cm时,土壤蒸发测定的精度最高,为98.5%,其次是高度为25 cm和15 cm时,精度分别为96.3%和93.5%。综合考虑精度和便捷性,推荐使用高度为20 cm、内径为10 cm且用薄铁皮封底的微型蒸渗仪。

英文摘要：

This study investigated the effects of the heights （10, 15, 20, 25 cm）, inner diameters （10, and 15 cm）, and back covering materials （thin iron sheet, and fine gauze） of micro-lysimeters on the measurement of evaporation in aeolian sandy soils in northern Shaanxi Province. The results indicated good correlations among the values measured by the different micro-lysimeters. Measured soil evaporation tended to increase with the increasing in the heights of lysimeters. Soil evaporation measured using the lysimeters of 20 cm height was significantly higher than that using the lysimeters of 10 cm height. No significant difference was observed between the values of soil evaporation measured using the lysimeters of 10 cm and 15 cm inner diameter under the height of 10 cm. However, the measured values were significantly higher in the lysimeters using iron than that using fine gauze as the back covering material. The precision of the measurement was the highest （98.5%） in the lysimeters of 20 em height, followed by in that of 25 em height （96.3%）, and then in that of 15 cm height （93.5%）. In consideration of accuracy and convenience, lysimeters with a height of 20 cm, inner diameter of 10 cm, and a back cover of thin iron sheet were optimize for measuring the evaporation of aeolian sandy soil in this area.