Intermediate soil acidification induces highest nitrous oxide emissions

Qiu, Yunpeng; Zhang, Yi; Zhang, Kangcheng; Xu, Xinyu; Zhao, Yunfeng; Bai, Tongshuo; Zhao, Yexin; Wang, Hao; Sheng, Xiongjie; Bloszies, Sean; Gillespie, Christopher J.; He, Tangqing; Wang, Yang; Chen, Huaihai; Guo, Lijin; Song, He; Ye, Chenglong; Wang, Yi; Woodley, Alex; Guo, Jingheng; Cheng, Lei; Bai, Yongfei; Zhu, Yongguan; Hallin, Sara; Firestone, Mary K.; Hu, Shuijin

doi:10.1038/s41467-024-46931-3

Title: Intermediate soil acidification induces highest nitrous oxide emissions

Journal Article · 27 March 2024 · Nature Communications

DOI: https://doi.org/10.1038/s41467-024-46931-3 · OSTI ID:2470913

^[1]; Zhang, Yi ^[1]; Zhang, Kangcheng ^[1]; Xu, Xinyu ^[1]; Zhao, Yunfeng ^[1]; Bai, Tongshuo ^[1]; Zhao, Yexin ^[1]; Wang, Hao ^[1]; Sheng, Xiongjie ^[2]; Bloszies, Sean ^[3];

^[3]; He, Tangqing ^[1]; Wang, Yang ^[4]; Chen, Huaihai ^[5]; Guo, Lijin ^[6]; Song, He ^[7]; Ye, Chenglong ^[1]; Wang, Yi ^[8]; Woodley, Alex ^[3];

^[9] more »

Nanjing Agricultural University (China)
Nanjing Agricultural University (China); Yunnan University, Kunming (China)
North Carolina State University, Raleigh, NC (United States)
Chinese Academy of Sciences (CAS), Beijing (China)
Sun Yat-Sen University, Guangzhou (China)
Fujian Agriculture and Forestry University, Fuzhou (China)
Anhui Agricultural University, Hefei (China)
Chinese Academy of Sciences (CAS), Xi'an (China)
China Agricultural University, Beijing (China)
Zhejiang University, Hangzhou (China)
Chinese Academy of Sciences (CAS), Xiamen (China); Chinese Academy of Sciences (CAS), Beijing (China); CAS Haixi Industrial Technology Innovation Center in Beilun, Ningbo (China). Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control
Swedish University of Agricultural Sciences, Uppsala (Sweden)
University of California, Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Global potent greenhouse gas nitrous oxide (N₂O) emissions from soil are accelerating, with increases in the proportion of reactive nitrogen emitted as N₂O, i.e., N₂O emission factor (EF). Yet, the primary controls and underlying mechanisms of EFs remain unresolved. Based on two independent but complementary global syntheses, and three field studies determining effects of acidity on N₂O EFs and soil denitrifying microorganisms, we show that soil pH predominantly controls N₂O EFs and emissions by affecting the denitrifier community composition. Analysis of 5438 paired data points of N₂O emission fluxes revealed a hump-shaped relationship between soil pH and EFs, with the highest EFs occurring in moderately acidic soils that favored N₂O-producing over N₂O-consuming microorganisms, and induced high N₂O emissions. Our results illustrate that soil pH has a unimodal relationship with soil denitrifiers and EFs, and the net N₂O emission depends on both the N₂O/(N₂O + N₂) ratio and overall denitrification rate. These findings can inform strategies to predict and mitigate soil N₂O emissions under future nitrogen input scenarios.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: China Postdoctoral Science Foundation; National Natural Science Foundation of China (NSFC); US Department of Agriculture (USDA); USDOE

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 2470913

Journal Information:: Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 15; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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