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Long-term fencing alters the vertical distribution of soil d(13)C and SOC turnover rate: Revealed by MBC-d(13)C

文献类型：期刊论文

作者Qu, Qing1,3,4,5; Zhang, Juan1,3,4,5; Hai, Xuying; Wu, Jianzhao; Fan, Jiawei; Wang, Defu; Li, Jiwei1,3,4,5; Shangguan, Zhouping1,2,3,4,5; Deng, Lei1,2,3,4,5
刊名AGRICULTURE ECOSYSTEMS & ENVIRONMENT
出版日期2022-11-01
卷号339页码:9
关键词Carbon cycle Grassland management Land use change Soil microorganism Soil d???????C-13 Degeneration
ISSN号0167-8809
DOI10.1016/j.agee.2022.108119
通讯作者Shangguan, Zhouping(shangguan@ms.iswc.ac.cn) ; Deng, Lei(leideng@ms.iswc.ac.cn)
英文摘要Grassland is the significant composition of the terrestrial carbon pool. Its belowground carbon turnover process is sensitive to land use changes and has a huge impact on atmospheric CO2 contents. However, the interpretation of the vertical distribution of delta C-13 values of soil organic carbon (SOC-delta C-13), the SOC turnover rate (beta value) and their changes in the soil profile remain uncertain after fencing (grazing exclusion). Grasslands that have been fenced for 39 years and grazed (as the control) on the Loess Plateau, China were selected to evaluate the vertical distribution of SOC-delta C-13 and beta values and their influencing factors across the 0-100 cm soil profile (0-10, 10-20, 20-40, 40-60, 60-80, 80-100 cm). The results showed that SOC gradually decreased but SOC-delta C-13 overall increased with soil depths. Fencing significantly decreased the SOC-delta C-13 in 10-80 cm depth. The SOC delta C-13 had a positive correlation with delta C-13 values of microbial biomass carbon (MBC-delta C-13), but negative correlations with root biomass. Besides, the beta values of 0-60 cm depth were higher in fencing grasslands (-2.70) than that in grazing grasslands (-11.38). Overall, carbon input, microbial fractionation and soil leaching contributed to the increasing trend of SOC-delta C-13 with soil depths, and fencing increased the SOC content in the profile but decreased the SOC turnover rate in 0-60 cm soils. The results provide direct evidence for the change of SOC-delta C-13 and a more comprehensive understanding of SOC-delta C-13 and SOC turnover dynamics with long-term fencing across the soil profile. The information on SOC dynamics and their feedback to long-term fencing can aid in developing reasonable grassland management measures.
WOS关键词DELTA-C-13 DEPTH PROFILES ; STABLE CARBON ISOTOPES ; ORGANIC-MATTER ; LAND-USE ; STORAGE ; SEQUESTRATION ; DECOMPOSITION ; DYNAMICS ; PATTERNS ; PLANT
资助项目Strategic Priority Research Program of the Chinese Academy of Sciences[XDA23070201] ; Scientific and Technological Innovation Project of Shaanxi Forestry Academy of Sciences[SXLK2021-0206] ; Key Research and Development Program of Shaanxi Province[2021ZDLSF05-02] ; Funding of Special Support Plan of Young Talents Project of the National Forestry andGrassland Administration in China[20201326015]
WOS研究方向Agriculture ; Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000869180700003
出版者ELSEVIER
资助机构Strategic Priority Research Program of the Chinese Academy of Sciences ; Scientific and Technological Innovation Project of Shaanxi Forestry Academy of Sciences ; Key Research and Development Program of Shaanxi Province ; Funding of Special Support Plan of Young Talents Project of the National Forestry andGrassland Administration in China
源URL[http://ir.igsnrr.ac.cn/handle/311030/185998]  
专题中国科学院地理科学与资源研究所
通讯作者Shangguan, Zhouping; Deng, Lei
作者单位1.Chinese Acad Sci, Res Ctr Soil & Water Conservat & Ecol Environm, State Key Lab Soil Eros & Dryland Farming Loess Pl, Yangling, 712100, Shaanxi, Peoples R China
2.Northwest A&F Univ, Inst Soil & Water Conservat, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
5.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式
GB/T 7714		 Qu, Qing,Zhang, Juan,Hai, Xuying,et al. Long-term fencing alters the vertical distribution of soil d(13)C and SOC turnover rate: Revealed by MBC-d(13)C[J]. AGRICULTURE ECOSYSTEMS & ENVIRONMENT,2022,339:9.
APA Qu, Qing.,Zhang, Juan.,Hai, Xuying.,Wu, Jianzhao.,Fan, Jiawei.,...&Deng, Lei.(2022).Long-term fencing alters the vertical distribution of soil d(13)C and SOC turnover rate: Revealed by MBC-d(13)C.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,339,9.
MLA Qu, Qing,et al."Long-term fencing alters the vertical distribution of soil d(13)C and SOC turnover rate: Revealed by MBC-d(13)C".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 339(2022):9.

入库方式： OAI收割

来源：地理科学与资源研究所

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