Soil organic carbon in particle-size fractions under three grassland types in Inner Mongolia, China

Purpose Transferring CO2 to soil organic carbon (SOC) is an important carbon sequestration mechanism that may mitigate global climate change. Grasslands can preserve 10–30% of total SOC stock. This study investigated the contribution of different soil particle-size fractions to SOC sequestration in grasslands, which play an important role for stabilization of SOC.