The Invesitigation on Dynamic Variabilityof Natural Secondary Forest Biomass at Different Degree of Burned Areas

The investigation on biomass chang in broad-leaved forest and the birch and larch forest at different degree of burned areas through the space sequence of sequence method.The result showed that the curne of the shrub biomass was severe fluctuant and but herbaceous biomass curve was smaller range of fluctuation,and finally have gradually stabilized in moderately and severe burned areas.the herbaceous biomass and the shrub biomass increased rapidly in beginning,after showing small amplitude fluctuations,and finally became stable in light burned.The tree biomass had radiate growth trend in the light,moderate and severe burned areas.The total biomass has mare correlation with time after the fire in two types of broad-leaved forest and the birch and larch forest in different burned areas.