Abstract:Soil surface evaporation in fragrant pear land of the Kuerle Irrigation Experiment Station was studied experimentally with different irrigation techniques.The relationships among soil surface evaporation intensity,soil water content and soil water consuming intensity were analyzed.Results showed that the treatmenu,in terms of the average soil surface evaporation intensity over the whole growth period,were in the descending order of microjet,small tube and ring tube.Their cumulative soil surface evaporation values were 116.05,104.53 and 89.60 mm,respectively.For the treatments of different tree intervals,the relative intensity of soil surface evaporation in 0-20 cm soil layer had a significant correlation with soil water content,presenting a quadratic increasing relation.In the whole growth period,soil water consumption intensity pres ented a high to low change,with the descending order of microjet,ring tube and small tube.Soil surface evaporation intensity increased with increased soil water consumption intensity,which can be described by power function.