The study looked at different types of maize to see how well they absorb and use potassium in low-potassium soil. They found that Nongda86 was the best at absorbing and storing potassium, while sweet corn was the worst. Some types of maize could use potassium more efficiently and tolerate low levels better. Denghai9 was the best at absorbing potassium from fertilizer and increasing yield. The study showed that some maize varieties can absorb potassium well and handle low levels without needing sodium as a substitute.