Shift in nitrogen transformation in peatland soil by nitrogen inputs
Shi, Yao3; Zhang, Xinyu4; Wang, Zucheng1,2; Xu, Zhiwei1,2; He, Chunguang1,2; Sheng, Lianxi2; Liu, Hanyu1,2; Wang, Zhongqiang1,2
Corresponding AuthorWang, Zhongqiang(wangzq027@nenu.edu.cn)
AbstractInputs of nitrogen (N) to peatlands in the form of fertilizers have rapidly increased due to the intensification of agricultural systems, impacting ecological processes, and the carbon storage function of peatland. However, detailed information on the impacts of long-term N inputs on the individual steps of N transformation processes in peatland soils still needs to be fully understood. We investigated N mineralization and nitrification rates as well as nitrite dependent anaerobic methane oxidation (n-damo), anaerobic ammonium oxidation (anammox), denitrification, and dissimilatory nitrate reduction to ammonium (DNRA) in a peatland affected by N inputs for >50 years, using isotope tracing technique and quantitative PCR. Based on the results, N inputs increased N mineralization and nitrification rates by 77 and 43%, respectively. Notably, the contributions of n-damo and anammox to N-2 production were enhanced by 242 and 170%, accounting for 30 and 12%, respectively. The contributions of denitrification and DNRA to N-2 production decreased by 27 and 52%, accounting for 48 and 10% of N-2 production, respectively. Nitrifier abundance increased significantly, with AOA being the dominant prokaryote (from 696 to 1090 copies g(-1)), but AOB responded more strongly to N inputs (from 5 to 68 copies g(-1)). The N inputs also promoted the growth of n-damo and anammox bacteria, whose abundances increased by 3.7% (from 565 to 586 copies g(-1)) and 85.7% (from 305 to 567 copies g(-1)), respectively, while denitrifier abundance was significantly reduced, with nirK and nirS abundances decreasing by 58% (from 738 to 308 copies g(-1)) and 50% (from 218 to 109 copies g(-1)), respectively. Soil pH was the key environmental factor influencing N transformations. We show that n-damo plays important roles in N cycling in peatland subjected to N inputs, providing a scientific basis for improved peatland management. (C) 2020 Elsevier B.V. AB rights reserved.
KeywordPeatland Nitrogen inputs N-damo Anammox Isotope tracing
Indexed BySCI
Funding ProjecttheNational Key Research and Development Program of China[2016YFC0500407] ; theNational Key Research and Development Program of China[2016YFD0200102]
Funding OrganizationtheNational Key Research and Development Program of China
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000614249600103
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorWang, Zhongqiang
Affiliation1.Northeast Normal Univ, Sch Geog Sci, Key Lab Geog Proc & Ecol Secur Changbai Mt, Minist Educ, Changchun 130024, Peoples R China
2.Northeast Normal Univ, State Environm Protect Key Lab Wetland Ecol & Veg, Changchun 130117, Peoples R China
3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China
4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Shi, Yao,Zhang, Xinyu,Wang, Zucheng,et al. Shift in nitrogen transformation in peatland soil by nitrogen inputs[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,764:9.
APA Shi, Yao.,Zhang, Xinyu.,Wang, Zucheng.,Xu, Zhiwei.,He, Chunguang.,...&Wang, Zhongqiang.(2021).Shift in nitrogen transformation in peatland soil by nitrogen inputs.SCIENCE OF THE TOTAL ENVIRONMENT,764,9.
MLA Shi, Yao,et al."Shift in nitrogen transformation in peatland soil by nitrogen inputs".SCIENCE OF THE TOTAL ENVIRONMENT 764(2021):9.
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