Research of the Biomass Dynamics in Burned Areas of Broad-leaved Forest and Birch and Larch Forest in Heihe Area

The investigation on biomass 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 total biomass of broad-leaved forest and the birch and larch forest into growing trend with time after fire.The curve of the proportion of the herbaceous biomass and shrub biomass account for total biomass was more volatile between 15 years in moderately and severe burned areas.But in light burned,the curve was gently fluctuant after 1 year.