Effects of Different Potassium Fertilizer on Yield and Accumulation of Potassium Absorption in Spring Maize

t [Objective]The research aimed to study the effects of different amount of potassium on the yield of spring maize,potassium absorption in plants and different organs. [Method]0,75,150,225,300 kg/hm2 potassium fertilizer were applied through the field experiment. [Result]The application of potassium fertilizer could significantly improve the yield of spring maize. When 225 kg/hm2 potassium was applied,the yield of spring maize reached the highest level,which was 15 531. 0 kg/hm2. Compared to the control,the yield increased by 24. 73% . With the stages of spring maize growth,the potassium accumulation increased slowly in the early period,then reached the maximum at the filling stage,after that began to decrease. Different organs of spring maize had different potassium accumulation curve. The leaf,the leaf sheath and the panicle showed a single peak curve. However,potassium absorption law of the stems was N-shaped curve. [Conclusion]The yield and potassium accumulation in the plants and different organs all appeared treatment ③ treatment ④ treatment ② treatment ① Cntrol.