| The experiment of potassium fertilization in different ways and at different potassium amounts were carried out in Akesu cotton-producing region of Xinjiang and its results showed that where the available soil potassium content ranged between 140 and 188 mg/kg, all the fertilizations with potassium fertilizers applied as base, topdressing and leaf fertilizers could increase cotton yield to some extent. and their yield increments ranged between 2.0% and 7.7%, 1.31% and 9.38%, and 2.7% and 6.38%, respectively. The optimal topdressing time was the period of full bloom, and the optimal concentration of potassium sulfate used as a fertilizer of foliar fertilization was 1%. Potassium fertilization increased the percentage of fruiting bolls, but did not affect fiber quality and strength. In addition, it increased fiber EI, Mic value and sugar content to some extent and made the 2.5% disposal length, length, uniformity, CSP and brownness of cotton fiber tend to decline. |