Effect Of Different Fire Severity On Carbon Storages Of Forestry Ecosystems

We sampled and analyzed the effect of fire severity on carbon storages(aboveground vegetation,dead woody residue,and soil)in the Huzhong forest region of the Great Xing’an Mountains.The allometric equation biomass harvesting methods,Chemical Analysis and other methods were employed to access to carbon storages.The study to identify difference in carbon storages under various fire severities(unburned,low,moderate,and high).Results showed that fire severities had significant effects on the aboveground carbon storages.The carbon storages were ranked in the order:unburned > low-severity > moderate-severity > high-severity.At the same fire severity level,forest carbon storages were generally ranked in the order: tree > shrub > grass;The carbon storages of dead woody residues under different fire severity were ranked in the order: moderate-severity> high-severity > low-severity > unburned.At the same fire severity level,forest carbon storages were generally ranked in the order: snag >log >litter > stump;The change of soil carbon reserves is significant under different fire severity.The effect of soil organic layer carbon reserves in the same year was O>A>B.As soil thickness deepens,carbon reserves are dwindling.The carbon storages of soil organic layer carbon reserves under different fire severity were ranked in the order:unburned > low-severity > moderate-severity > high-severity.Comparison of the effects of fire disturbances in different years on carbon reserves of soil organic layer.In the long run,each layer of organic carbon reserves is larger than the unburned,In the case of heavy fire interference,the O and A layer carbon reserves are increased first and then reduced,B-tier carbon reserves grow less and fewer.