气候变化领域集成服务门户(CCPortal): Soil organic carbon turnover following forest restoration in south China: Evidence from stable carbon isotopes

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DOI	10.1016/j.foreco.2020.117988
	Soil organic carbon turnover following forest restoration in south China: Evidence from stable carbon isotopes
	Xiong X.; Zhang H.; Deng Q.; Hui D.; Chu G.; Meng Z.; Zhou G.; Zhang D.
发表日期	2020
ISSN	0378-1127
卷号	462
英文摘要	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 < NP2 = AP = CP < SF. The estimated β values ranged from −19.70 to −5.22 but showed an opposite trend to α values. Additionally, changes of the α and β values among these forests were mainly regulated by soil water content and bulk density. Our findings demonstrate that forest restoration could enhance soil C stock equivalent to the undisturbed old-growth forests within a few decades, but the rate of soil C turnover in these restored forests were still higher. © 2020 Elsevier B.V.
关键词	Conservation Isotopes Organic carbon Reforestation Restoration Soil moisture Evergreen broad-leaved forests Isotopic enrichment Natural restoration Soil carbon stock Soil carbon turnover Soil organic carbon turnovers Soil water content Stable carbon isotopes Soil surveys broad-leaved forest carbon balance carbon sequestration forest ecosystem organic carbon reforestation restoration ecology secondary forest soil carbon soil profile soil water stable isotope tropical forest turnover Carbon Conservation Forests Isotopes Reforestation Restoration Slope China Acacia mangium Coniferophyta
语种	英语
来源机构	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132927
推荐引用方式 GB/T 7714	Xiong X.,Zhang H.,Deng Q.,et al. Soil organic carbon turnover following forest restoration in south China: Evidence from stable carbon isotopes[J]. Forest Ecology and Management,2020,462.
APA	Xiong X..,Zhang H..,Deng Q..,Hui D..,Chu G..,...&Zhang D..(2020).Soil organic carbon turnover following forest restoration in south China: Evidence from stable carbon isotopes.,462.
MLA	Xiong X.,et al."Soil organic carbon turnover following forest restoration in south China: Evidence from stable carbon isotopes".462(2020).