Soil Evaporation of Summer Corn under Alternate-furrow Irrigation Condition

Soil evaporation of summer corn under alternate-furrow irrigation and conventional furrow irrigation condition was measured by using micro-lysimeters.Moreover,the change tendency of soil evaporation,rainfall and reference crop evapotranspiration,daily variation of soil evaporation between alternate-furrow irrigation and conventional furrow irrigation under different soil moisture treatments were analyzed in this paper.In addition,the relationship among soil evaporation,leaf area index and surface soil moisture was discussed as well as the equation between soil evaporation and leaf area index was established.In the end,this paper put forward that there was a sensitive relationship between relative evaporation intensity and surface soil moisture under sufficient irrigation.The results indicated that soil evaporation of alternate-furrow irrigation was lower than that of conventional furrow irrigation at the same treatment,the difference in soil evaporation between alternate-furrow irrigation and conventional furrow irrigation would become smaller and smaller with the increase of the lower limit value of soil moisture.The relative evaporation intensity decreased with the increase of leaf area index,while increased with the increase of surface soil moisture.