钾肥运筹对春玉米农学效应和钾素利用的研究

Research of Agricultural Effect of Potash Application on Spring Maize and Potassium Utilization

在吉林榆树市粮食高产示范区,以先玉335为试验材料,研究不同钾肥运筹对春玉米的生长发育、养分吸收和产量的影响。结果表明:钾肥90 kg/hm2,1/2基施,1/2拔节期追施(1:1)的处理6产量最高,钾肥后移可显著提高玉米产量。不同钾肥用量的钾肥农学利用率、钾肥利用率、钾肥偏生产力有随施钾量的提高而降低的趋势,相同施钾量条件下,分施与一次性施用相比、钾肥农学利用率,钾肥利用率、钾肥偏生产力有所提高。本试验处理6(基肥:拔节肥为1:1)是兼顾产量和环境的最佳钾肥运筹方式。

Xianyu 335’was used as material in the experiment,the effect of different potash application methods on growth and development,nutrition absorption and yields of spring maize was studied in high yield demonstration zone of YuShu City.The results showed that the yield of the sixth treatment of potash fertilizer 90 kg/hm2,1/2 base fertilizer,1/2 elongation stage topdressing（1：1） was the highest.Applied potash fertilizer later could significantly improve the maize yield.Potash fertilizer agronomic efficiency,potash fertilizer use efficiency and potash fertilizer partial productivity declined with the increasing of potash ap plication rate.At the same amount of potash fertilizer,potash fertilizer use efficiency,potash fertilizer agro nomic efficiency and potash fertilizer partial productivity were improved by applied several times compared with one time.The sixth treatment of this experiment（basic fertilizer： elongation fertilizer of 1：1） was the best potash application method to balance production and environment.