Spatial distribution of organic and inorganic carbon and estimation of soil carbon storage in surface soil of Hebei Plain,China

Baced on topsoil total and organic carbon data obtained by multi-purpose regional geochemical survey,we studied the spatial distribution of inorganic and organic carbon,the reserve of soil inorganic and total carbon in the surface soil of Hebei Plain. The results showed that the spatial distribution of soil carbon has close relationship with soil type and landform,especially the old channel and lake. In addition,it also is influenced by human activity. Soil total carbon storage is 320. 56Mt and density is 4. 33kg/m2,inorganic carbon storage is145. 74Mt and density is 1. 97kg/m2. The reserve of alluvial soil and cinnamon soil is the maximum,and the two highest density soil types are meadow saline soil and alluvial soil. Inorganic carbon in alluvial soil is secondary carbonate,but that in cinnamon soil is primary carbonate.