Soil organic carbon turnover following forest restoration in south China: Evidence from stable carbon isotopes,Forest Ecology and Management

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Soil organic carbon turnover following forest restoration in south China: Evidence from stable carbon isotopes
Forest Ecology and Management ( IF 3.7 ) Pub Date : 2020-04-01 , DOI: 10.1016/j.foreco.2020.117988
Xin Xiong , Huiling Zhang , Qi Deng , Dafeng Hui , Guowei Chu , Ze Meng , Guoyi Zhou , Deqiang Zhang

Abstract As over half of the world’s tropical forests are reforested or afforested, understanding the resilience of carbon (C) pool in these forests is critical for global C balance. While most previous studies on the reforested lands have focused on C stock recovery, soil C turnover has largely been overlooked. We evaluated soil C turnover rate by calculating the isotopic enrichment factors of α (defined as the slope of the regression between the δ13C difference and ln-transferred C concentrations in mineral soil samples relative to the surface litter) and β (defined as the slope of the regression between δ13C and log-transferred C concentrations) along 0–30 cm soil profiles in a 400-year-old monsoon evergreen broad-leaved forest (MEBF), a 51-year-old mixed-native plantation (NP1), a 31-year-old mixed-native plantation (NP2), a 31-year-old Acacia mangium plantation (AP), a 31-year-old mixed-conifer plantation (CP), and a 31-year-old secondary forest with natural restoration (SF). Results showed that soil C stocks did not differ among the six forests. The estimated α values ranged from 1.0023 to 1.0086 and increased in the order of MEBF = NP1

更新日期：2020-04-01

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