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Dry-wet cycles promoting the accumulation of microbial necromass and mineral associated organic carbon after wheat straw and nitrogen co-addition

文献类型：期刊论文

作者Dai, Weijie3,4; Xiao, Rongbo2; Li, Zhiying3,4; Deng, Yanghui1; Yang, Fen4; Wei, Chaoyang4
刊名PLANT AND SOIL
出版日期2024-06-19
卷号N/A
关键词CO2-C emissions Soil aggregate Mineral associated organic carbon Microbial necromass carbon
DOI10.1007/s11104-024-06803-7
产权排序1
文献子类Article ; Early Access
英文摘要Aim Soil organic carbon preservation is crucial for mitigating global warming and achieving sustainable agricultural development. However, little is known about how dry-wet cycles impact stable soil organic carbon fraction such as mineral associated organic carbon (MAOC) and microbial necromass carbon after wheat straw and nitrogen co-addition. Method To address this gap, we conducted an indoor incubation experiment including control (CK), ammonium nitrogen addition (N), wheat straw addition (Straw), wheat straw and N co-addition (Straw + N) under constant water content or four dry-wet cycles. The dynamic change of soil respiration, MAOC as well as bacterial and fungal necromass carbon was monitored during each dry-wet cycle. Results Compared to constant water content, dry-wet cycles decreased the cumulative emission of soil respiration CO2-C in Straw + N by 10.80%. Compared to CK, MAOC increased by 149% and 123% in Straw and Straw + N groups under dry-wet cycles, respectively, which was more prominent than constant water content. Moreover, compared to CK, bacterial necromass carbon raised by 60.20% in Straw + N under dry-wet cycles, which was the highest among all groups. Fungal necromass carbon didn't change in Straw + N under dry-wet cycles, but decreased under constant water content or in Straw groups. Random forest and correlation analysis suggested that MAOC was mainly formed via ex vivo pathway by adsorbing dissolved organic carbon after straw addition. Conclusion Our study demonstrates that the incorporation of straw and nitrogen addition has the potential to enhance agricultural soil organic carbon sequestration by inhibiting soil respiration and rising stable organic carbon stocks under dry-wet cycles.
WOS关键词SOIL ; MATTER ; FRACTIONS ; STABILITY ; AGGREGATE ; DYNAMICS
WOS研究方向Agriculture ; Plant Sciences
WOS记录号WOS:001250975800001
出版者SPRINGER
源URL[http://ir.igsnrr.ac.cn/handle/311030/205307]  
专题陆地表层格局与模拟院重点实验室_外文论文
通讯作者Yang, Fen; Wei, Chaoyang
作者单位1.Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China
2.Guangdong Univ Technol, Guangdong Ind Contaminated Site Remediat Technol &, Sch Environm Sci & Engn, Guangzhou 510006, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China
推荐引用方式
GB/T 7714		 Dai, Weijie,Xiao, Rongbo,Li, Zhiying,et al. Dry-wet cycles promoting the accumulation of microbial necromass and mineral associated organic carbon after wheat straw and nitrogen co-addition[J]. PLANT AND SOIL,2024,N/A.
APA Dai, Weijie,Xiao, Rongbo,Li, Zhiying,Deng, Yanghui,Yang, Fen,&Wei, Chaoyang.(2024).Dry-wet cycles promoting the accumulation of microbial necromass and mineral associated organic carbon after wheat straw and nitrogen co-addition.PLANT AND SOIL,N/A.
MLA Dai, Weijie,et al."Dry-wet cycles promoting the accumulation of microbial necromass and mineral associated organic carbon after wheat straw and nitrogen co-addition".PLANT AND SOIL N/A(2024).

入库方式： OAI收割

来源：地理科学与资源研究所

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