Soil organic carbon and its labile fractions in paddy soil as influenced by water regimes and straw management

Understanding the effects of water regimes and straw management on soil organic carbon (SOC) pools is necessary to improve soil C sequestration and soil quality. Based on a long-term field experiment (15 years), we examined impacts of water regimes and straw management methods on total soil organic C (TOC), particulate organic C (POC) and potassium permanganate-oxidizable C (KMnO4–C) at two soil depths. Water regimes consisted of flooding...