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Higher endogenous labile organic carbon decreases the temperature sensitivity of soil organic matter decomposition in two subtropical forests

文献类型：期刊论文

作者Ma, Di2,3; Sun, Yu2,3; Liu, Min2,3; Fang, Huajun1,2,3; Xu, Xingliang2,3
刊名APPLIED SOIL ECOLOGY
出版日期2025-02-01
卷号206页码:105816
关键词Yellow brown loam Lateritic red soil Soil microbial biomass Q10 Microbial quotient
ISSN号0929-1393
DOI10.1016/j.apsoil.2024.105816
产权排序1
文献子类Article
英文摘要The impact of climate change on terrestrial carbon (C) balance largely depends on the temperature sensitivity of soil organic carbon (SOC) decomposition (Q10). Soil C components are believed to regulate the temperature sensitivity of SOC decomposition. However, the regulatory role of endogenous labile organic carbon (LOC) remains unclear. To address this gap, soil samples were collected from two subtropical forests. Following centrifugal extraction to obtain LOC solutions, these were reintroduced back to the soil to adjust endogenous LOC concentrations at three levels (High-C, Medium-C, and Low-C). Subsequently, soil samples were incubated at three temperatures (i.e., 5 degrees C, 15 degrees C, and 25 degrees C) for 60 days to monitor CO2 emissions. Results showed that cumulative CO2 emissions from soils increased with endogenous LOC concentrations. In both subtropical forests, endogenous LOC significantly decreased the short-term (1 day) or mid-term (28 days) Q10 of SOC decomposition. At the mid-term (28 days), High-C soils exhibited a notable increase in microbial biomass C (MBC). After 60 days, the most significant increase in microbial biomass nitrogen (MBN) was observed in High-C soils at 25 degrees C. Soil endogenous LOC concentrations notably influenced microbial quotient (qCO2). Additionally, a positive correlation was noted between soil MBC and Q10, while a negative correlation existed between soil MBN and Q10. In conclusion, elevated endogenous LOC concentrations were found to reduce the temperature sensitivity of SOC decomposition by promoting microbial biomass growth and reducing qCO2. These findings highlight the importance of endogenous LOC in assessing the impact of climate warming on SOC dynamics.
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WOS关键词MICROBIAL BIOMASS ; LITTER DECOMPOSITION ; SUBSTRATE QUALITY ; RESPIRATION ; MODEL ; FUMIGATION ; NITROGEN ; CO2 ; MINERALIZATION ; VARIABILITY
WOS研究方向Agriculture
语种英语
WOS记录号WOS:001439538600001
出版者ELSEVIER
源URL[http://ir.igsnrr.ac.cn/handle/311030/213195]  
专题生态系统网络观测与模拟院重点实验室_外文论文
通讯作者Xu, Xingliang
作者单位1.Zhongke Jian Inst Ecoenvironm Sci, Jian 343000, Peoples R China
2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 101408, Peoples R China;
3.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, 11A Datun Road, Beijing 100101, Peoples R China;
推荐引用方式
GB/T 7714		 Ma, Di,Sun, Yu,Liu, Min,et al. Higher endogenous labile organic carbon decreases the temperature sensitivity of soil organic matter decomposition in two subtropical forests[J]. APPLIED SOIL ECOLOGY,2025,206:105816.
APA Ma, Di,Sun, Yu,Liu, Min,Fang, Huajun,&Xu, Xingliang.(2025).Higher endogenous labile organic carbon decreases the temperature sensitivity of soil organic matter decomposition in two subtropical forests.APPLIED SOIL ECOLOGY,206,105816.
MLA Ma, Di,et al."Higher endogenous labile organic carbon decreases the temperature sensitivity of soil organic matter decomposition in two subtropical forests".APPLIED SOIL ECOLOGY 206(2025):105816.

入库方式： OAI收割

来源：地理科学与资源研究所

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