Abstract: This paper discusses the microflorae in soils under different forest types at Dinghusan natural reserve and their adaptability to acidity：1.Under mixed forest,ammonifying Bacteria,cellulose-decomposing bacteria and Oligonitrophiles are dominant；under broadleaved forest,ceIlulose-decomposing fungi are more；and little difference can be found for anaerobic nitrogen-fixing bacteria under different forests. 2.Though the soil at Dinghusan natural reserve are strongly acidic,bacteria are more adaptative to neutral enviroiiment,and only fungi can adapt to strongly acid environment.

Key words: energy-source plant,  , Panicum virgatum, salt stress, seedling stage.