汾河三坝灌区咸水灌溉技术试验结果表明：先淡后咸灌水方式比先咸后淡灌水方式冬小麦、春玉米、棉花分别增产６６ ％ 、４２ ％ 、５２ ％ ，比单用咸水灌溉增产３９１ ％ 、７９ ％ 、２６３ ％ 。在淡水资源许可的情况下，应采用咸、淡水轮灌，并且尽可能保证苗期淡水灌溉。三种作物生育期的土壤含盐量、相对溶液浓度以先淡后咸的灌水方式对作物生长较为有利。 The experimental results of salt water irrigation in Sanba Irrigation District of Fenhe River showed that the light salty water irrigation methods increased yield by 6.6%, 4.2% and 5.2% respectively than that of the light salty and fresh irrigation methods of winter wheat, spring corn and cotton Single salt water irrigation yield 39  1%, 7  9%, 26  3%. In the case of freshwater resources, salty and freshwater rotations should be adopted, and seedling freshwater irrigation should be ensured as much as possible. The soil salinity and relative solution concentration of the three crops during the growth period are favorable to the crop growth with the first light salty irrigation.