Based on fairly systematic observational data, the authors probed into dynamic variations of slow-released, rapid available and water soluble potash constituents in the rock-soil environment. The results show that the seasonal dynamic variation of slow-release potash constituents will condition that of the rapid available and water soluble potash constituents, with the variation range of the last two sorts of constituents larger than that of the first sort.Such dynamic variations are also influenced by soil types and soil depths.