Soil evaporation (Es) is considered to be an important component of evapotranspiration (ET). In dry land of North China

the amount of water loss from soil through evaporation can take up to 50% or more of precipitation in the same period and during wheat growing season

evaporation can take up to 66% of field evapotranspiration. Research on soil evaporation and how to reduce soil evaporation is significant to find an approach to an efficient use of water resources. This preliminary study was conducted to examine the influences of different treatment measures on soil evaporation using a weighing lysimeter system. Results show that straw mulching and high stubble can restrain soil evaporation after irrigation when soil water content is high. In clear weather

soil evaporation intensity reaches the maximum at about 10:30 am

but straw mulching and high stubble can make it later. Loosing soil when soil water content is high cannot restrain soil evaporation

but it can significantly restrain soil evaporation when water content is reduced to a certain degree.