Abstract: The effects of AM fungus Glomus mosseae inoculation on the potassium absorption of flue-cured tobacco were studied with un-sterilized soil in a pot experiment.Potassium application and AM fungi inoculation had a significant influence on potassium accumulation and distribution, and the difference of potassium contents among different growth stages and different leaf positions was significant (P< 0.01).Different combinations of AM fungi inoculation and potassium application had an obvious influence on potassium content in tobacco leaf during the middle and later growth stage.AM fungi inoculation could enhance the potassium content of top, middle, and beneath position leaf, and hence, the content of potassium in leaf was increased, but that in stem was relatively lower.

Key words: Arbuscular mycorrhizal fungi, Potassium-applied amount, Potassium accumulation and distribution, Potassium content in tobacco leaf, Flue-cured Tobacco