To provide scientific experience for higher efficient utilization of soil potassium,effects of low-molecular weight organic acids and cations on the release of potassium from different potassium-bearing minerals (biotite,muscovite and orthoclase) by the ways of extracting.The results showed that different low-molecular weight organic acids and cations increased the release of potassium from potassium-bearing minerals significantly.Compared to that of the control treatment (H2O),the release amount of potassium from biotite using oxalic acid (OA),citric acid (CA),tartaric acid (TA),NH4Ac,CaCl2,NaCl and H+ as extractants was increased up to 188.2%,151.6%,149.6%,24.6%,32.6%,3.5% and 169.8%,respectively.The release amount of potassium from muscovite using the same solutions as extractants was increased up to 211.0%,202.8%,199.4%,81.6%,38.3%,21.7% and 169.1%,respectively.The release amount of potassium from orthoclase was increased up to 219.0%,206.6%,216.0%,144.1%,27.5%,60.4% and 210.9%,respectively.Using the same extractant,the release amount of potassium was in the order of muscovite>bitotite>orthoclase.The release amount of potassium from potassium-bearing minerals was increased with the increase of the concentration of the extractant.