中文摘要：

利用野外实测数据建立的表层土壤日蒸发量和含水率间的函数关系,估算了灌溉前后3个时段的土壤日蒸发量,并以多种数学方法对其空间特征进行了探讨。结果表明：（1）灌溉后前期（1周）与后期（3周）的土壤蒸发量呈显著的负相关关系,其余各时段蒸发量的相关性不显著;（2）灌溉前土壤蒸发量的总体差异较大,空间关联性很弱,呈随机的斑块状分布,灌溉后总体差异明显减小,空间关联性增强,分布类型转为区域化分布;（3）由随机因素引起的空间异质性在灌溉后则更多地受空间自相关控制;（4）由于林带、芦苇丛和微地形的影响,灌后1周时采样区西边的土壤蒸发量大于东面,其余两个时段东西向无明显差异;灌溉前南部区域土壤蒸发量较北部区域大,灌后1周时该种情形被逆转,灌后3周时又转为向灌溉前回归。

英文摘要：

The method of obtaining sandy soil daily evaporation from a function is very useful when needing a mass of data.The aim of this study is to find such a function,and to discuss the spatial-temporal variability of sandy bared soil evaporation before and after irrigation by using the accounting data.An experiment is carried out to study the problems.The results indicate that the soil evaporation one week before and three weeks after irrigation has distinct correlativity,but that in other stages does not.Whereas,the evaporation before irrigation differs much,and its spatial relationship is weak,but it reverses after irrigation.Moreover,the spatial conjunction is controlled more by spatial self-correlation but spatial heterogeneity in this stage.Also the spatial distribution of soil evaporation changes over time and space.Because of vegetation and landform of the study area,the evaporation of west zone was larger than that of east one a week after irrigation,while that in other two stages has no marked differences in the west and east.In time sequence,the evaporation of north region was stronger than that of south zone before irrigation.But a week after irrigation,the evaporation of southern part was stronger,and it changed over again three weeks after irrigation.