| The characteristics of soil water distribution and soil water balance of winter wheat were analyzed under sprinkler irrigation,with surface irrigation(border irrigation) as the control treatment.The experimental results indicated that the soil water movement under sprinkler irrigation appeared obviously the characteristics of unsaturated water movement,while that under surface irrigation presented the characteristics of saturated water movement.The irrigation water was distributed in 050 cm soil layer under sprinkler irrigation,and it could reach 150 cm layer below ground surface under surface irrigation.There was no obvious soil water percolation under sprinkler irrigation,but the rate of water percolation was about 10% of irrigation amount under surface irrigation.During the experiment periods in 2003 and 2004,the evapotranspiration of sprinkler irrigation was 312.2 mm and 324.4 mm,respectively,being 13.1 mm and 35.1 mm less than that of surface irrigation. |