A microbial-explicit model with comprehensive nitrogen processes to quantify gaseous nitrogen production from agricultural soils

Zhifeng Yan; Baoxuan Chang; Xiaotong Song; Gangsheng Wang; Jun Shan; Liuqing Yang; Si liang Li; Klaus Butterbach-Bahl; Xiaotang Ju

doi:10.1016/j.soilbio.2023.109284

A microbial-explicit model with comprehensive nitrogen processes to quantify gaseous nitrogen production from agricultural soils

Zhifeng Yan^*, Baoxuan Chang, Xiaotong Song, Gangsheng Wang, Jun Shan, Liuqing Yang, Si liang Li, Klaus Butterbach-Bahl, Xiaotang Ju

^*Corresponding author af dette arbejde

Institut for Agroøkologi - Center for Landscape Research in Sustainable Agricultural Futures - Land-CRAFT

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Tidsskriftartikel › Forskning › peer review

6 Citationer (Scopus)

Abstract

Agricultural soils are a major source of anthropogenic N₂O, but their N₂O emission estimates are highly uncertain, mainly due to the complexity of nitrogen (N) processes. Most soil N models include only primary N processes such as nitrification and denitrification, which limits their ability to realistically simulate N transformations in soils and accurately estimate N₂O emissions from soils. This study introduces a Microbial-Explicit Model incorporating Comprehensive Nitrogen processes (MEMCN) to evaluate and quantify the influences of various N processes on the production of N₂O as well as NO and N₂, including nitrification, denitrification, anaerobic ammonium oxidation (ANAMMOX), dissimilatory nitrate reduction to ammonium (DNRA), mineralization, and microbial assimilation (i.e., growth) and death. The MEMCN was evaluated in laboratory experiments using agricultural soils with different levels of N additions under anaerobic and aerobic conditions, and reproduced well the dynamics of NH₄⁺, NO₃⁻, NO₂⁻, NO, N₂O, and N₂. After nitrification and denitrification, ANAMMOX and assimilation were found to be most important in controlling N transformations in agricultural soils. ANAMMOX directly increased N₂ emissions by 139% at the beginning of the simulations (i.e., 48 h) under anaerobic conditions, while microbial assimilation indirectly reduced NO, N₂O, and N₂ emissions by 88%, 54%, and 58%, respectively, at the end of the simulations (i.e., 336 h) under aerobic conditions. Correspondingly, the biomass of ANAMMOX bacteria increased significantly at the beginning of the simulations under anaerobic conditions, while the biomass of nitrite oxidizing bacteria increased substantially under aerobic conditions. In contrast, DNRA, mineralization and microbial death had minor effect on soil N transformations, and the biomass of DNRA bacteria and heterotrophs did not change significantly during the simulations. Our study shows that it is necessary to include ANAMMOX and microbial assimilation in soil N models, while explicit simulation of microbial biomass dynamics may only be necessary if microbial biomass pools change significantly.

Originalsprog	Engelsk
Artikelnummer	109284
Tidsskrift	Soil Biology & Biochemistry
Vol/bind	189
ISSN	0038-0717
DOI	https://doi.org/10.1016/j.soilbio.2023.109284
Status	Udgivet - feb. 2024

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10.1016/j.soilbio.2023.109284

Citationsformater

@article{8b0c0294f9e94961a526105407937f95,

title = "A microbial-explicit model with comprehensive nitrogen processes to quantify gaseous nitrogen production from agricultural soils",

abstract = "Agricultural soils are a major source of anthropogenic N2O, but their N2O emission estimates are highly uncertain, mainly due to the complexity of nitrogen (N) processes. Most soil N models include only primary N processes such as nitrification and denitrification, which limits their ability to realistically simulate N transformations in soils and accurately estimate N2O emissions from soils. This study introduces a Microbial-Explicit Model incorporating Comprehensive Nitrogen processes (MEMCN) to evaluate and quantify the influences of various N processes on the production of N2O as well as NO and N2, including nitrification, denitrification, anaerobic ammonium oxidation (ANAMMOX), dissimilatory nitrate reduction to ammonium (DNRA), mineralization, and microbial assimilation (i.e., growth) and death. The MEMCN was evaluated in laboratory experiments using agricultural soils with different levels of N additions under anaerobic and aerobic conditions, and reproduced well the dynamics of NH4+, NO3−, NO2−, NO, N2O, and N2. After nitrification and denitrification, ANAMMOX and assimilation were found to be most important in controlling N transformations in agricultural soils. ANAMMOX directly increased N2 emissions by 139% at the beginning of the simulations (i.e., 48 h) under anaerobic conditions, while microbial assimilation indirectly reduced NO, N2O, and N2 emissions by 88%, 54%, and 58%, respectively, at the end of the simulations (i.e., 336 h) under aerobic conditions. Correspondingly, the biomass of ANAMMOX bacteria increased significantly at the beginning of the simulations under anaerobic conditions, while the biomass of nitrite oxidizing bacteria increased substantially under aerobic conditions. In contrast, DNRA, mineralization and microbial death had minor effect on soil N transformations, and the biomass of DNRA bacteria and heterotrophs did not change significantly during the simulations. Our study shows that it is necessary to include ANAMMOX and microbial assimilation in soil N models, while explicit simulation of microbial biomass dynamics may only be necessary if microbial biomass pools change significantly.",

keywords = "ANAMMOX, Assimilation, DNRA, Gaseous N production, Microbial-explicit model, N transformation",

author = "Zhifeng Yan and Baoxuan Chang and Xiaotong Song and Gangsheng Wang and Jun Shan and Liuqing Yang and Li, {Si liang} and Klaus Butterbach-Bahl and Xiaotang Ju",

note = "Publisher Copyright: {\textcopyright} 2023 Elsevier Ltd",

year = "2024",

month = feb,

doi = "10.1016/j.soilbio.2023.109284",

language = "English",

volume = "189",

journal = "Soil Biology & Biochemistry",

issn = "0038-0717",

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A microbial-explicit model with comprehensive nitrogen processes to quantify gaseous nitrogen production from agricultural soils. / Yan, Zhifeng; Chang, Baoxuan; Song, Xiaotong et al.
I: Soil Biology & Biochemistry, Bind 189, 109284, 02.2024.

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Tidsskriftartikel › Forskning › peer review

TY - JOUR

T1 - A microbial-explicit model with comprehensive nitrogen processes to quantify gaseous nitrogen production from agricultural soils

AU - Yan, Zhifeng

AU - Chang, Baoxuan

AU - Song, Xiaotong

AU - Wang, Gangsheng

AU - Shan, Jun

AU - Yang, Liuqing

AU - Li, Si liang

AU - Butterbach-Bahl, Klaus

AU - Ju, Xiaotang

PY - 2024/2

Y1 - 2024/2

N2 - Agricultural soils are a major source of anthropogenic N2O, but their N2O emission estimates are highly uncertain, mainly due to the complexity of nitrogen (N) processes. Most soil N models include only primary N processes such as nitrification and denitrification, which limits their ability to realistically simulate N transformations in soils and accurately estimate N2O emissions from soils. This study introduces a Microbial-Explicit Model incorporating Comprehensive Nitrogen processes (MEMCN) to evaluate and quantify the influences of various N processes on the production of N2O as well as NO and N2, including nitrification, denitrification, anaerobic ammonium oxidation (ANAMMOX), dissimilatory nitrate reduction to ammonium (DNRA), mineralization, and microbial assimilation (i.e., growth) and death. The MEMCN was evaluated in laboratory experiments using agricultural soils with different levels of N additions under anaerobic and aerobic conditions, and reproduced well the dynamics of NH4+, NO3−, NO2−, NO, N2O, and N2. After nitrification and denitrification, ANAMMOX and assimilation were found to be most important in controlling N transformations in agricultural soils. ANAMMOX directly increased N2 emissions by 139% at the beginning of the simulations (i.e., 48 h) under anaerobic conditions, while microbial assimilation indirectly reduced NO, N2O, and N2 emissions by 88%, 54%, and 58%, respectively, at the end of the simulations (i.e., 336 h) under aerobic conditions. Correspondingly, the biomass of ANAMMOX bacteria increased significantly at the beginning of the simulations under anaerobic conditions, while the biomass of nitrite oxidizing bacteria increased substantially under aerobic conditions. In contrast, DNRA, mineralization and microbial death had minor effect on soil N transformations, and the biomass of DNRA bacteria and heterotrophs did not change significantly during the simulations. Our study shows that it is necessary to include ANAMMOX and microbial assimilation in soil N models, while explicit simulation of microbial biomass dynamics may only be necessary if microbial biomass pools change significantly.

AB - Agricultural soils are a major source of anthropogenic N2O, but their N2O emission estimates are highly uncertain, mainly due to the complexity of nitrogen (N) processes. Most soil N models include only primary N processes such as nitrification and denitrification, which limits their ability to realistically simulate N transformations in soils and accurately estimate N2O emissions from soils. This study introduces a Microbial-Explicit Model incorporating Comprehensive Nitrogen processes (MEMCN) to evaluate and quantify the influences of various N processes on the production of N2O as well as NO and N2, including nitrification, denitrification, anaerobic ammonium oxidation (ANAMMOX), dissimilatory nitrate reduction to ammonium (DNRA), mineralization, and microbial assimilation (i.e., growth) and death. The MEMCN was evaluated in laboratory experiments using agricultural soils with different levels of N additions under anaerobic and aerobic conditions, and reproduced well the dynamics of NH4+, NO3−, NO2−, NO, N2O, and N2. After nitrification and denitrification, ANAMMOX and assimilation were found to be most important in controlling N transformations in agricultural soils. ANAMMOX directly increased N2 emissions by 139% at the beginning of the simulations (i.e., 48 h) under anaerobic conditions, while microbial assimilation indirectly reduced NO, N2O, and N2 emissions by 88%, 54%, and 58%, respectively, at the end of the simulations (i.e., 336 h) under aerobic conditions. Correspondingly, the biomass of ANAMMOX bacteria increased significantly at the beginning of the simulations under anaerobic conditions, while the biomass of nitrite oxidizing bacteria increased substantially under aerobic conditions. In contrast, DNRA, mineralization and microbial death had minor effect on soil N transformations, and the biomass of DNRA bacteria and heterotrophs did not change significantly during the simulations. Our study shows that it is necessary to include ANAMMOX and microbial assimilation in soil N models, while explicit simulation of microbial biomass dynamics may only be necessary if microbial biomass pools change significantly.

KW - ANAMMOX

KW - Assimilation

KW - DNRA

KW - Gaseous N production

KW - Microbial-explicit model

KW - N transformation

U2 - 10.1016/j.soilbio.2023.109284

DO - 10.1016/j.soilbio.2023.109284

M3 - Journal article

AN - SCOPUS:85180991637

SN - 0038-0717

VL - 189

JO - Soil Biology & Biochemistry

JF - Soil Biology & Biochemistry

M1 - 109284

ER -

A microbial-explicit model with comprehensive nitrogen processes to quantify gaseous nitrogen production from agricultural soils

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