基施钾肥对耐密·紧凑型夏玉米品种主要农艺性状和产量的影响

目的]探索实现夏玉米高产的适宜施钾水平。方法]以邢玉10号为试验材料,设氯化钾施肥量0(不施肥,CK)、90、150、210、270、360 kg/hm~2共6个处理,研究不同钾肥施肥水平对耐密、紧凑型夏玉米主要农艺性状及产量的影响。结果]施用钾肥可以促进玉米生长发育,株高、穗位高、穗长、穗行数、行粒数、穗粒数、千粒重和产量均显著增加,果穗秃尖长度显著变短,钾肥对玉米有较显著的增产作用。当施钾量≤210 kg/hm~2时,不同施钾量处理的株高、穗位高、穗长、穗行数、行粒数、穗粒数、千粒重、秃尖长度和产量差异均达到显著水平;当施钾量210 kg/hm~2时,继续加大施肥水平,株高、穗位高、穗长、穗行数、行粒数、穗粒数、千粒重、秃尖长度和产量增效作用不明显,表明钾肥能够显著提高夏玉米的农艺性状和产量,但过多施用钾肥对农艺性状和产量影响不大,反而造成浪费。结论]该研究可为提高玉米产量和种植效益提供理论支持。

Effects of Base Potassium Fertilzer on Agronomic Traits and Yield of Density -Tolerant Summer Maize

Objective]To explore the suitable potassium fertilizer level to achieve high yield of summer maize.Method]With Xingyu No.10 as test material,to study effect of different potassium fertilizer levels(09,0150,210,270,360 kg/hm 2 )on agronomic traits and yield of density-tol-erant summer maize.Result] Potassium fertilizer can promote the growth and development of maize ,plant height,ear position height,ear length, row number,kernels per row,kernels per spike,1000 -grain weight and yield were significantly increased,bare tip length was shortened,the potas-sium fertilizer significantly increased maize yield.When the amount of potassium was not more than 210 kg/hm2,the differences of plant height, ear position height,ear length,row number,kernels per row,kernels per spike,1000-grain weight,bare tip length and yield of different potassium treatments were significant.When the amount of potassium was more than 210 kg/hm2 ,continuously increased the fertilization level,plant height, ear position height,ear length,row number,kernels per row,kernels per spike,1000-grain weight,bare tip length and yielding effect were not ob-vious.Potassium fertilizer can significantly improve the agronomic traits and yield of summer maize ,but not the more the better ,too much potassi-um fertilizer had little effect on yield,but cause waste.Conclusion]The study can provide a theoretical basis for increasing maize yield and plant -ing benefit.