The soil aggregate is the basic unit of soil structure,and also a special kind of organic-inorganic composite.Form of carbon in soil aggregates is mainly organic carbon,which cementation play a key role in formation of soil aggregates.Stability mechanism of organic carbon in soil aggregates include chemical,physics,and biological stability.The process of soil aggregates transforming also show a cycle of organic carbon accumulation-decomposition.In conclusion,carbon sequestration in soil is mainly accomplished in soil aggregates and working during the whol...