Vital roles of soil microbes in driving terrestrial nitrogen immobilization
Li, Zhaolei1,2,3,4,5; Zeng, Zhaoqi1,6; Song, Zhaopeng5,7; Wang, Fuqiang5,8; Tian, Dashuan1; Mi, Wenhai9; Huang, Xin5; Wang, Jinsong1; Song, Lei1,6; Yang, Zhongkang4; Wang, Jun4; Feng, Haojie4; Jiang, Lifen5; Chen, Ye10; Luo, Yiqi5; Niu, Shuli1,6
Corresponding AuthorNiu, Shuli(sniu@igsnrr.ac.cn)
AbstractNitrogen immobilization usually leads to nitrogen retention in soil and, thus, influences soil nitrogen supply for plant growth. Understanding soil nitrogen immobilization is important for predicting soil nitrogen cycling under anthropogenic activities and climate changes. However, the global patterns and drivers of soil nitrogen immobilization remain unclear. We synthesized 1350 observations of gross soil nitrogen immobilization rate (NIR) from 97 articles to identify patterns and drivers of NIR. The global mean NIR was 8.77 +/- 1.01 mg N kg(-1) soil day(-1). It was 5.55 +/- 0.41 mg N kg(-1) soil day(-1) in croplands, 15.74 +/- 3.02 mg N kg(-1) soil day(-1) in wetlands, and 15.26 +/- 2.98 mg N kg(-1) soil day(-1) in forests. The NIR increased with mean annual temperature, precipitation, soil moisture, soil organic carbon, total nitrogen, dissolved organic nitrogen, ammonium, nitrate, phosphorus, and microbial biomass carbon. But it decreased with soil pH. The results of structural equation models showed that soil microbial biomass carbon was a pivotal driver of NIR, because temperature, total soil nitrogen, and soil pH mostly indirectly influenced NIR via changing soil microbial biomass. Moreover, microbial biomass carbon accounted for most of the variations in NIR among all direct relationships. Furthermore, the efficiency of transforming the immobilized nitrogen to microbial biomass nitrogen was lower in croplands than in natural ecosystems (i.e., forests, grasslands, and wetlands). These findings suggested that soil nitrogen retention may decrease under the land use change from forests or wetlands to croplands, but NIR was expected to increase due to increased microbial biomass under global warming. The identified patterns and drivers of soil nitrogen immobilization in this study are crucial to project the changes in soil nitrogen retention.
Keywordcroplands global change microbial biomass nitrogen immobilization soil nitrogen retention
Indexed BySCI
Funding ProjectNational Natural Science Foundation of China[31988102] ; National Natural Science Foundation of China[31625006] ; CAS International Collaboration Program[131A11KYSB20180010] ; China Postdoctoral Science Foundation[2018M641459] ; China International Postdoctoral Exchange Fellowship Program[20190071]
Funding OrganizationNational Natural Science Foundation of China ; CAS International Collaboration Program ; China Postdoctoral Science Foundation ; China International Postdoctoral Exchange Fellowship Program
WOS Research AreaBiodiversity & Conservation ; Environmental Sciences & Ecology
WOS SubjectBiodiversity Conservation ; Ecology ; Environmental Sciences
WOS IDWOS:000625494000001
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Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorNiu, Shuli
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
2.Southwest Univ, Coll Resources & Environm, Chongqing, Peoples R China
3.Southwest Univ, Acad Agr Sci, Chongqing, Peoples R China
4.Shandong Agr Univ, Coll Resources & Environm, Natl Engn Lab Efficient Utilizat Soil & Fertilize, Key Lab Agr Environm,Univ Shandong, Tai An, Shandong, Peoples R China
5.No Arizona Univ, Dept Biol Sci, Ctr Ecosyst Sci & Soc, Flagstaff, AZ 86011 USA
6.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China
7.Beijing Forestry Univ, Key Lab Forest Resources & Ecosyst Proc, Beijing, Peoples R China
8.China Agr Univ, Coll Resources & Environm Sci, Beijing, Peoples R China
9.Yangzhou Univ, Coll Environm Sci & Engn, Yangzhou, Jiangsu, Peoples R China
10.No Arizona Univ, Dept Math, Flagstaff, AZ 86011 USA
Recommended Citation
GB/T 7714
Li, Zhaolei,Zeng, Zhaoqi,Song, Zhaopeng,et al. Vital roles of soil microbes in driving terrestrial nitrogen immobilization[J]. GLOBAL CHANGE BIOLOGY,2021:11.
APA Li, Zhaolei.,Zeng, Zhaoqi.,Song, Zhaopeng.,Wang, Fuqiang.,Tian, Dashuan.,...&Niu, Shuli.(2021).Vital roles of soil microbes in driving terrestrial nitrogen immobilization.GLOBAL CHANGE BIOLOGY,11.
MLA Li, Zhaolei,et al."Vital roles of soil microbes in driving terrestrial nitrogen immobilization".GLOBAL CHANGE BIOLOGY (2021):11.
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