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Soil microbial community responses to long-term nitrogen addition at different soil depths in a typical steppe

文献类型：期刊论文

作者Niu, Guoxiang3; Hasi, Muqier3; Wang, Ruzhen2; Wang, Yinliu3; Geng, Qianqian3; Hu, Shuya3; Xu, Xiaohui3; Yang, Junjie3; Wang, Changhui; Han, Xingguo3
刊名APPLIED SOIL ECOLOGY
出版日期2021
卷号167
ISSN号0929-1393
关键词Mongolian Plateau N deposition Soil microbiome Steppe Soil profile Vertical distribution
DOI10.1016/j.apsoil.2021.104054
文献子类Article
英文摘要Global nitrogen (N) deposition has been influencing the structure of soil microbial communities, which play fundamental roles in modifying most biogeochemical processes. However, to date, our understanding of how long-term N deposition affects soil microbial communities, particularly those in subsurface soil, is largely incomplete. In this study, we examined soil microbial phospholipid fatty acids at different depths in the soil profile, including in topsoil (0-10 cm), midsoil (30-40 cm), and subsoil (70-100 cm), in a 10-year N addition experimental site in a semiarid steppe. We collected soil samples at four N addition treatment levels, including 0, 2, 10, and 50 g M-2 year(-1), which represented control, low-N, medium-N, and high-N inputs, respectively. Our results showed that N addition remarkably shifted soil microbial communities by increasing the relative abundances of bacteria and Gram-positive (GP) bacteria, and decreasing Gram-negative (GN) bacterial relative abundance across the three soil layers by affecting soil pH and NO3-N, particularly under the medium- and highN addition rates. Moreover, the effects of N addition tended to increase with the N addition rate but diminished with soil depth. Soil pH, NO3-N, and NH4-N were the most important driving factors for changes in microbial community composition in topsoil, whereas soil total N (TN) and total carbon were important in midsoil, and TN, dissolved organic N, and soil moisture were important in subsoil. The relative abundances of bacteria and GN bacteria also decreased, whereas those of fungi and GP bacteria increased with soil depth regardless of N addition. Soil TN and pH were the most important factors in shaping the vertical distribution of soil microbial communities. Our results suggest that both N addition and soil depth may cause similar microbial community shifts, through which fungi and GP bacteria become dominant, but through different mechanisms. These results suggest that it is important to distinguish among the N-deposition effects on soil microbial communities at different soil depths when building soil system models.
学科主题Soil Science
电子版国际标准刊号1873-0272
出版地AMSTERDAM
WOS关键词CARBON-USE EFFICIENCY ; ORGANIC-CARBON ; PATTERNS ; DEPOSITION ; BACTERIAL ; BIOMASS ; BIODIVERSITY ; MYCORRHIZAL ; SUBSOIL ; FUNGAL
WOS研究方向Science Citation Index Expanded (SCI-EXPANDED)
语种英语
出版者ELSEVIER
WOS记录号WOS:000691498900005
资助机构Inner Mongolia Grassland Ecosystem Research Station ; National Natural Science Foundation of China [31870440, 32071562]
源URL[http://ir.ibcas.ac.cn/handle/2S10CLM1/26617]  
专题植被与环境变化国家重点实验室
作者单位1.Chinese Acad Sci, Inst Appl Ecol, Erguna Forest Steppe Ecotone Ecosyst Res Stn, Shenyang 110016, Peoples R China
2.Univ Chinese Acad Sci, Yuquan Rd, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
推荐引用方式
GB/T 7714		 Niu, Guoxiang,Hasi, Muqier,Wang, Ruzhen,et al. Soil microbial community responses to long-term nitrogen addition at different soil depths in a typical steppe[J]. APPLIED SOIL ECOLOGY,2021,167.
APA Niu, Guoxiang.,Hasi, Muqier.,Wang, Ruzhen.,Wang, Yinliu.,Geng, Qianqian.,...&Huang, Jianhui.(2021).Soil microbial community responses to long-term nitrogen addition at different soil depths in a typical steppe.APPLIED SOIL ECOLOGY,167.
MLA Niu, Guoxiang,et al."Soil microbial community responses to long-term nitrogen addition at different soil depths in a typical steppe".APPLIED SOIL ECOLOGY 167(2021).

入库方式： OAI收割

来源：植物研究所

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