Soil Water Contents Control the Responses of Dissolved Nitrogen Pools and Bacterial Communities to Freeze-Thaw in Temperate Soils
Joint Authors
Juan, Yinghua
Jiang, Nan
Tian, Lulu
Chen, Xiaodong
Sun, Wentao
Chen, Lijun
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-03-11
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
Background.
Freeze-thaw influences soil-dissolved nitrogen (N) pools due to variations in bacterial communities in temperate regions.
The availability of soil water is important to soil biogeochemical cycles under frozen conditions.
However, it is unclear how soil water content (SWC) mediates the effects of freeze-thaw on soil-dissolved N pools and bacterial communities.
Method.
In this study, freeze-thaw microcosms were incubated at three levels of SWC, including 10% (air-dried soils), 15% (natural SWC), and 30% (wet soils).
In addition to measuring soil-dissolved N pools, variations in bacterial communities were examined using high-throughput sequencing.
Results and Conclusions.
Total dissolved N (TDN), NO3--N, NH4+-N, microbial biomass N (MBN), and net N mineralization rate (NNMR) were significantly influenced by SWC, freeze-thaw, and their interaction (NH4+-N excluded).
N immobilization was inhibited under both low and high SWC, which was accompanied by varied bacterial community composition.
However, only higher SWC substantially modified the freeze-thaw effects on the soil-dissolved N pools, characterized by a decrease in N mineralization (especially for the content of NO3--N and NNMR) and an increase in N immobilization (MBN).
These scenarios could be significantly correlated to variations in bacterial community composition based on redundancy analysis, especially by species belonging to Bacteroidetes, Nitrospirae, Alphaproteobacteria, Gemmatimonadetes, and Verrucomicrobia (Spearman’s correlations).
In conclusion, bacterial species passed through biotic (bacterial species) and abiotic filters (soil N pools) in response to freeze-thaw under varied SWC.
American Psychological Association (APA)
Jiang, Nan& Juan, Yinghua& Tian, Lulu& Chen, Xiaodong& Sun, Wentao& Chen, Lijun. 2020. Soil Water Contents Control the Responses of Dissolved Nitrogen Pools and Bacterial Communities to Freeze-Thaw in Temperate Soils. BioMed Research International،Vol. 2020, no. 2020, pp.1-10.
https://search.emarefa.net/detail/BIM-1136286
Modern Language Association (MLA)
Jiang, Nan…[et al.]. Soil Water Contents Control the Responses of Dissolved Nitrogen Pools and Bacterial Communities to Freeze-Thaw in Temperate Soils. BioMed Research International No. 2020 (2020), pp.1-10.
https://search.emarefa.net/detail/BIM-1136286
American Medical Association (AMA)
Jiang, Nan& Juan, Yinghua& Tian, Lulu& Chen, Xiaodong& Sun, Wentao& Chen, Lijun. Soil Water Contents Control the Responses of Dissolved Nitrogen Pools and Bacterial Communities to Freeze-Thaw in Temperate Soils. BioMed Research International. 2020. Vol. 2020, no. 2020, pp.1-10.
https://search.emarefa.net/detail/BIM-1136286
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1136286