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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。
In the high-yield grain yield demonstration area in Yushu City of Jilin Province, the samples of Xiangyu 335 were used to study the effects of different potassium fertilizers on the growth and development, nutrient absorption and yield of spring maize. The results showed that the yield of treatment 6 with 90 kg / hm2, 1/2 basal application and 1/2 jointing stage of potash fertilizer was the highest, and the potash fertilizer could significantly increase the yield of maize. Potassium application rate, potassium utilization rate and partial productivity of potash fertilizer decreased with the increase of potassium application rate under different potassium application rates. Compared with one-time application, the rates of potash fertilizer utilization, potash fertilizer application rate, Utilization rate, potash partial productivity has been increased. The test treatment 6 (basal: jointing fertilizer is 1: 1) is to take into account the yield and the environment of the best potassium fertilizer operation.