To clarify soil K adsorptiondesorption characteristics in different treatments of ridge with film mulching and furrowed seeding system in semiarid area in Liaoning,a field study was conducted from 2007 to 2013 at Fuxin Science Observation Research Stations of Agricultural Environment and Cultivated Land Conservation,including the treatments of ridge with film mulching and furrow seeding(furrow was uncovered,T1),both ridge and furrow with film mulching(T2),and the traditional planting(T0).Laboratory experiment was combined to analyze the effects of ridge with film mulching and furrowed seeding system on soil K adsorptiondesorption.The results indicated that T1 and T2 restrained the soil K adsorption according to the Langmuir and Freundlich equation parameters such as MBC and Kf,compared with that of T0.The buffer capacity and intensity of K sorption in T1 treatment was the minimum among all the treatments.And the MBC value were:T1(6.62)