Methods of field experiment chemical analysis and data statistics were employed to study effect of potassium application on N, P, K content, nutrient uptake and dry matter accumulation of Yangmai 158 at different growing stages.Differences in nutrient uptake between seven cultivars including Yangmai 158 were also investigated at the same pot assium application level.The results indicated that, the peak of nutrient uptake and biomass accumulation appeared at the jointing and booting stages.Phosphorus content of the wheat cultivars was comparatively stable, but nitrogen and potassium contents fluctuated at different growing stages.It suggests that combined application of N, P at a suitable ratio is necessary for a good fertilization recommendation to meet the nutrient demands of wheat for high yield, high quality and high economic efficiency.