不同施钾量对春玉米产量及钾素吸收积累的影响

目的]研究不同施钾量对春玉米产量及植株、不同器官钾素吸收积累量的影响。方法]通过田间试验,分别施07、51、502、25、300 kg/hm2钾肥。结果]适量施用钾肥能明显提高春玉米的产量。当施钾225 kg/hm2时玉米产量最高,为15 531.0 kg/hm2,与对照相比增产24.73%;随生育时期的进展,春玉米钾素积累量前期缓慢增长,在灌浆期达到最大值,而后钾素积累量下降;春玉米各器官钾素积累量变化有所不同,叶片、叶鞘和穗部均呈单峰曲线,而茎秆钾素吸收规律呈"N"形曲线。结论]不同施钾量产量、植株钾素积累量和不同器官钾素积累量均表现为处理③>处理④>处理②>处理①>对照(CK)。

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.