[Objective] The study aimed to explore the effect of NaCl at low concn.on the growth of sorghum.[Method] With non-halophytes C4 plant sorghum as the material and Hoagland solution as the basic cultural liquid,the seedlings of sorghum were treated with NaCl at 3 kinds of concn.(5,10,20 mmol/L)and the effects of NaCl at low concn.on the growth of sorghum were studied by using sand culture method.[Result] From the view of sorghum growth vigor,the sorghum plant treated with NaCl at low concn.(5 mmol/L)was bette...