Abstract:

Based on the consecutive forest resources inventory data collected in 1985, and the forest fire data in Daxing'an Mountains occurred in 1987, the carbon emission and the dynamic of the NPP following the forest fire were studied by the GIS. In this study the forest biomass before the fire was calculated in order to estimate the carbon emissions during the period of catching fire. The estimated emitted carbon was around 1.97×10⁶～2.47×10⁶ t. Furthermore, the carbon emissions of different arbor species at different grade of fires were compared respectively. The result indicated that the carbon emissions of L. gmelinii was about 0.96×10⁶～1.19×10⁶ t, accounted for 49% of the total. The carbon emission in the area burned by severely fire was above 99% of the total carbon emissions. The NPP has been gradually growing over the last 21 years since the forest fire and currently the NPP of the burned area has already reached to the level of the unburned area.

Key words: Daxingan Mountain, forest fire, carbon emission, NPP (net primary productivity)