Nitrogen inputs are more important than denitrifier abundances in controlling denitrification-derived N2O emission from both urban and agricultural soils
Xu, Hui-Juan1,2; Yang, Xiao-Ru1; Li, Shun1,3; Xue, Xi-Mei1; Chang, Shuai4; Li, Hu1; Singh, Brajesh K.5,6; Su, Jian-Qiang1; Zhu, Yong-Guan1,7
2019-02-10
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume650Pages:2807-2817
AbstractCities are increasingly being recognized as important contributors in global warming, for example by increasing atmospheric nitrous oxide (N2O). However, urban ecosystems remain poorly understood due to their functional complexity. Further, few studies have documented the microbial processes governing the N2O emissions from urban soils. Here, a field study was performed to assess in situ N2O emissions in an urban and agricultural soil located in Xiamen, China. The mechanisms underlying the difference in N2O emission patterns in both soils were further explored in an incubation experiment. Field investigations showed that N2O emission (3.5-19.0 mu g N2O-N m(-2) h(-1)) from the urban soil was significantly lower than that from the agricultural soil (25.4-18,502.3 mu g N2O-N m(-2) h(-1)). Incubation experiments showed that the urban soil initially emitted lower denitrification-derived N2O because of the lower nirS (encoding nitrite reductases) abundances, whereas overall N2O accumulation during the incubation was mainly controlled by the initial nitrate content in soil. Nitrate addition in a short period (5 days) did not change the total bacterial and denitrifier abundances or the soil bacterial community composition, but significantly altered the relative distribution of some key genera capable of denitrification. Although the urban soil exhibited lower N2O emission than its agricultural counterpart in this study, the expanding urban green areas should be taken into account when building N2O emission reduction targets. (c) 2018 Elsevier B.V. All rights reserved.
KeywordDenitrification Urbanization Nitrous oxide Illumina sequencing Denitrifier
Language英语
Document Type期刊论文
Identifierhttp://ir.kib.ac.cn/handle/151853/63090
Collection中国科学院东亚植物多样性与生物地理学重点实验室
Corresponding AuthorSu, Jian-Qiang
Affiliation1.Chinese Acad Sci, Key Lab Urban Environm & Hlth, Inst Urban Environm, Xiamen 361021, Peoples R China
2.South China Agr Univ, Coll Nat Resources & Environm, Guangzhou 510642, Guangdong, Peoples R China
3.Univ Tubingen, Ctr Appl Geosci, D-72074 Tubingen, Germany
4.Chinese Acad Sci, Kunming Inst Bot, Key Lab Plant Divers & Biogeog East Asia, Kunming 650201, Yunnan, Peoples R China
5.Univ Western Sydney, Hawkesbury Inst Environm, Penrith, NSW 2751, Australia
6.Univ Western Sydney, Global Ctr Land Based Innovat, Penrith, NSW 2751, Australia
7.Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China
Recommended Citation
GB/T 7714
Xu, Hui-Juan,Yang, Xiao-Ru,Li, Shun,et al. Nitrogen inputs are more important than denitrifier abundances in controlling denitrification-derived N2O emission from both urban and agricultural soils[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,650:2807-2817.
APA Xu, Hui-Juan.,Yang, Xiao-Ru.,Li, Shun.,Xue, Xi-Mei.,Chang, Shuai.,...&Zhu, Yong-Guan.(2019).Nitrogen inputs are more important than denitrifier abundances in controlling denitrification-derived N2O emission from both urban and agricultural soils.SCIENCE OF THE TOTAL ENVIRONMENT,650,2807-2817.
MLA Xu, Hui-Juan,et al."Nitrogen inputs are more important than denitrifier abundances in controlling denitrification-derived N2O emission from both urban and agricultural soils".SCIENCE OF THE TOTAL ENVIRONMENT 650(2019):2807-2817.
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