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[目的]研究春玉米对钾素的吸收、积累与分配规律,为有效施用钾肥,促进产量增长提供理论依据。[方法]以先玉335为材料,设置K0(不施用钾肥)、K1(施用K2O100 kg/hm2)、K2(施用K2O200 kg/hm2)、K3(施用K2O300 kg/hm2)4个处理,进行田间小区试验,研究钾素在春玉米不同生育时期的动态变化。[结果]不同施钾处理钾素吸收、积累与分配规律基本一致,春玉米生育前期钾素积累量为K3>K2>K1>K0,生育后期则为K2>K3>K1>K0。[结论]春玉米对钾素的吸收不随施钾量的增加而提高,过量施用钾肥不是提高玉米产量的有效途径。
[Objective] The research aimed to study the law of potassium absorption, accumulation and distribution in spring maize and provide the theoretical basis for the effective application of potassium fertilizer and the increase of yield. [Method] With Xiangyu 335 as raw material, four treatments including K0 (without K fertilizer), K1 (K2O100 kg / hm2), K2 (K2O200 kg / hm2) and K3 (K2O00 kg / hm2) Community trials to study the dynamic changes of potassium in different growth stages of spring maize. [Result] The absorption, accumulation and distribution of potassium in different treatments were basically the same. The accumulation of K in early spring maize was K3> K2> K1> K0 and K2> K3> K1> K0 in the later growth period. [Conclusion] The absorption of potassium in spring maize did not increase with the increase of K application. Excessive application of K fertilizer was not an effective way to increase maize yield.