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Nitrogen fertilization directly affects soil bacterial diversity and indirectly affects bacterial community composition
Zeng Jun1; Liu XueJun2; Song Ling2
Corresponding AuthorChu haiyan
2016
Source PublicationSoil Biology & Biochemistry
ISSN0038-0717
Volume92Pages:41-49
Abstract

Nitrogen (N) deposition influences both above- and below-ground communities and influences ecosystem functioning. However it is not clear about direct or indirect interactions among plants, soils and microbes in response to nitrogen deposition. In this study, the responses of soil bacterial diversity to N enrichment were investigated at surface (0–10 cm) and sub-surface (10–20 cm) soils in a temperate steppe ecosystem. N addition (>120 kg N ha−1 yr−1) resulted in a significant shift in bacterial community composition and a decrease in bacterial OTU richness in surface soil, but the effect on the sub-surface layer was far less pronounced, even at the highest addition rate (240 kg N ha−1 yr−1). Bacterial OTU richness was significantly correlated with soil and plant characteristics. Hierarchical structural equation modeling showed that soil ammonium availability was responsible for the shift in bacterial richness, whereas the change in bacterial community composition was due to alterations in soil pH and plant composition. These results indicated that N fertilization directly affected soil bacterial richness but indirectly affected bacterial communities through soil acidification and plant community change, indicating distinct controls on soil bacterial diversity and community composition. Our results also suggest that N availability could be a good predictor for the loss of soil bacterial diversity under atmospheric nitrogen deposition.

KeywordAbove- And Below-ground Interactions Bacteria Biodiversity Nitrogen Fertilization Grassland Pyrosequencing
DOI10.1016/j.soilbio.2015.09.018
Indexed BySCI
Language英语
WOS IDWOS:000367487700005
Citation statistics
Cited Times:211[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/17809
Collection山地表生过程与生态调控重点实验室
Affiliation1.State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, East Beijing Road 71, Nanjing 210008, PR China
2.College of Resources and Environmental Sciences, Key Laboratory of PlanteSoil Interactions of the Ministry of Education, China Agricultural University, Beijing 100193, PR China
Recommended Citation
GB/T 7714
Zeng Jun,Liu XueJun,Song Ling. Nitrogen fertilization directly affects soil bacterial diversity and indirectly affects bacterial community composition[J]. Soil Biology & Biochemistry,2016,92:41-49.
APA Zeng Jun,Liu XueJun,&Song Ling.(2016).Nitrogen fertilization directly affects soil bacterial diversity and indirectly affects bacterial community composition.Soil Biology & Biochemistry,92,41-49.
MLA Zeng Jun,et al."Nitrogen fertilization directly affects soil bacterial diversity and indirectly affects bacterial community composition".Soil Biology & Biochemistry 92(2016):41-49.
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