[Objective] The purpose was to discuss the concn.of brackish water from different groundwater depths suitable for irrigating summer maize.[Method] With Xundan 20 as tested materials,the center steams infiltration meter was used to control different groundwater depth(2,3,4 m),the irrigation experiments were carried out on summer maize by using brackish water with different concn.of 1.5,2.5,3.5 and 4.5 g/L under the condition that the irrigation quota was 900 m3/hm2.Some growing indexes of summer maize such a...