Field experiments were conducted to study the effects of different potassium application rates on the population development characteristics, N, P, K absorption and distribution of wheat, i.e. K1 (90 kg / hm2), K2 (135 kg / hm2), K3 (180 kg / hm2). The results showed that the total stem number, leaf area index and filling rate of population were the best at the level of 135kg / hm2 of potassium fertilizer, and some varieties of K3 treatment decreased. Meanwhile, the dry matter production and accumulation capacity of Jimai 22 is higher than Gaoyou 2018 and shimai 22, which is conducive to the formation of high yield. In the range of 0 ~ 135kg / hm ~ 2, increasing K application can significantly improve the nutrient absorption of wheat plants, which is conducive to the increase of yield, but increasing fertilizer application is not conducive to high yield.<br>
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