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.