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Not all soil carbon is created equal: Labile and stable pools under nitrogen input

文献类型：期刊论文

作者Zang, Huadong11; Mehmood, Imran9,10; Kuzyakov, Yakov7,8; Jia, Rong11; Gui, Heng6; Blagodatskaya, Evgenia5; Xu, Xingliang3,4; Smith, Pete2; Chen, Haiqing1; Zeng, Zhaohai11
刊名GLOBAL CHANGE BIOLOGY
出版日期2024-07-01
卷号30期号:7页码:12
关键词C-13 natural abundance labile C pools microbial biomass microbial community nutrient availability SOM decomposition stable C pools
ISSN号1354-1013
DOI10.1111/gcb.17405
英文摘要Anthropogenic activities have raised nitrogen (N) input worldwide with profound implications for soil carbon (C) cycling in ecosystems. The specific impacts of N input on soil organic matter (SOM) pools differing in microbial availability remain debatable. For the first time, we used a much-improved approach by effectively combining the C-13 natural abundance in SOM with 21 years of C-3-C-4 vegetation conversion and long-term incubation. This allows to distinguish the impact of N input on SOM pools with various turnover times. We found that N input reduced the mineralization of all SOM pools, with labile pools having greater sensitivity to N than stable ones. The suppression in SOM mineralization was notably higher in the very labile pool (18%-52%) than the labile and stable (11%-47%) and the very stable pool (3%-21%) compared to that in the unfertilized control soil. The very labile C pool made a strong contribution (up to 60%) to total CO2 release and also contributed to 74%-96% of suppressed CO2 with N input. This suppression of SOM mineralization by N was initially attributed to the decreased microbial biomass and soil functions. Over the long-term, the shift in bacterial community toward Proteobacteria and reduction in functional genes for labile C degradation were the primary drivers. In conclusion, the higher the availability of the SOM pools, the stronger the suppression of their mineralization by N input. Labile SOM pools are highly sensitive to N availability and may hold a greater potential for C sequestration under N input at global scale.
WOS关键词MICROBIAL BIOMASS ; ORGANIC-MATTER ; FERTILIZATION ; TURNOVER ; COMMUNITIES ; SEQUESTRATION ; RESPIRATION ; EXTRACTION ; DEPOSITION ; BACTERIAL
资助项目National Key Research and Development Program of China[2022YFD1901100] ; National Natural Science Foundation of China[32101850] ; National Natural Science Foundation of China[31972520]
WOS研究方向Biodiversity & Conservation ; Environmental Sciences & Ecology
语种英语
WOS记录号WOS:001263874900001
出版者WILEY
资助机构National Key Research and Development Program of China ; National Natural Science Foundation of China
源URL[http://ir.igsnrr.ac.cn/handle/311030/207591]  
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Fan, Mingsheng
作者单位1.China Agr Univ, Coll Land Sci & Technol, Beijing, Peoples R China
2.Univ Aberdeen, Inst Biol & Environm Sci, Aberdeen, Scotland
3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China
4.Chinese Acad Sci, Inst Geog Sci & Nat Resources, Key Lab Ecosyst Network Observat & Modeling, Beijing, Peoples R China
5.UFZ Helmholtz Ctr Environm Res, Dept Soil Ecol, Halle, Saale, Germany
6.Chinese Acad Sci, Kunming Inst Bot, Key Lab Plant Divers & Biogeog East Asia, Kunming, Peoples R China
7.Peoples Friendship Univ Russia RUDN Univ, Moscow, Russia
8.Univ Gottingen, Dept Agr Soil Sci, Gottingen, Germany
9.Shandong Rainbow Agr Technol Co Ltd, Weifang, Peoples R China
10.China Agr Univ, Natl Acad Agr Green Dev, Coll Resources & Environm Sci, Beijing 100193, Peoples R China
推荐引用方式
GB/T 7714		 Zang, Huadong,Mehmood, Imran,Kuzyakov, Yakov,et al. Not all soil carbon is created equal: Labile and stable pools under nitrogen input[J]. GLOBAL CHANGE BIOLOGY,2024,30(7):12.
APA Zang, Huadong.,Mehmood, Imran.,Kuzyakov, Yakov.,Jia, Rong.,Gui, Heng.,...&Fan, Mingsheng.(2024).Not all soil carbon is created equal: Labile and stable pools under nitrogen input.GLOBAL CHANGE BIOLOGY,30(7),12.
MLA Zang, Huadong,et al."Not all soil carbon is created equal: Labile and stable pools under nitrogen input".GLOBAL CHANGE BIOLOGY 30.7(2024):12.

入库方式： OAI收割

来源：地理科学与资源研究所

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