Abstract: To study the influence of different factors on salt and water movement under indirect subsurface drip irrigation， the present study was conducted to investigate the effect of different dripper discharge and irrigation quantity and waterconducting device diameter on water salt distribution in root zone by analysis of variance. It was shown that the increase of dripper discharge and decrease of waterconducting device diameter could increase soil moisture content. Large irrigation quantity with small dripper discharge would increase the depth of water downward migration. The increase of irrigation quantity would significantly increase moisture content in main root zone. The influences of waterconducting device diameter and dripper discharge were more significant on lateral migration than that of irrigation water.

Key words: dripper discharge, irrigation quantity, waterconducting device diameter； indirect subsurface drip irrigation, water and salt movement