Direct and indirect effects of elevated CO2 and nitrogen addition on soil microbial communities in the rhizosphere of Bothriochloa ischaemum

doi:10.1007/s11368-019-02336-0

	Direct and indirect effects of elevated CO2 and nitrogen addition on soil microbial communities in the rhizosphere of Bothriochloa ischaemum
	Xiao, Lie 2; Liu, Guobin 1,3; Li, Peng 2; Xue, Sha 1,3
刊名	JOURNAL OF SOILS AND SEDIMENTS
	2019-11-01
卷号	19 期号:11 页码:3679-3687
关键词	Elevated CO2 Nitrogen deposition Phospholipid fatty acids Soil-microbe-plant system Structural equation modeling
ISSN号	1439-0108
DOI	10.1007/s11368-019-02336-0
通讯作者	Xue, Sha(xuesha100@163.com)
英文摘要	Purpose Elevated CO2 and nitrogen (N) addition both affect soil microbial communities, which significantly influence soil processes and plant growth. Here, we evaluated the combined effects of elevated CO2 and N addition on the soil-microbe-plant system of the Chinese Loess Plateau. Materials and methods A pot cultivation experiment with two CO2 treatment levels (400 and 800 mu mol mol(-1)) and three N addition levels (0, 2.5, and 5 g N m(-2) year(-1)) was conducted in climate-controlled chambers to evaluate the effects of elevated CO2 and N addition on microbial community structure in the rhizosphere of Bothriochloa ischaemum using phospholipid fatty acid (PLFA) profiles and associated soil and plant properties. Structural equation modeling (SEM) was used to identify the direct and indirect effects of the experimental treatments on the structure of microbial communities. Results and discussion Elevated CO2 and N addition both increased total and fungal PLFAs. N addition alone increased bacterial, Gram-positive, and Gram-negative PLFAs. However, elevated CO2 interacting with N addition had no significant effects on the microbial community. The SEM indicated that N addition directly affected the soil microbial community structure. Elevated CO2 and N addition both indirectly affected the microbial communities by affecting plant and soil variables. N addition exerted a stronger total effect than elevated CO2. Conclusions The results highlighted the importance of comprehensively studying soil-microbe-plant systems to deeply reveal how characteristics of terrestrial ecosystems may respond under global change.
资助项目	National Natural Science Foundation of China[41701603] ; Program for Science & Technology Innovation Research Team of Shaanxi Province[2018TD-037] ; Western Young Scholars Project of the Chinese Academy of Sciences[XAB2015A05]
WOS关键词	N ADDITION ; BACTERIAL COMMUNITIES ; CNP STOICHIOMETRY ; FOREST ECOSYSTEMS ; CARBON-DIOXIDE ; PINE FOREST ; FERTILIZATION ; DEPOSITION ; PHOSPHORUS ; RESPIRATION
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000491550500002
资助机构	National Natural Science Foundation of China ; Program for Science & Technology Innovation Research Team of Shaanxi Province ; Western Young Scholars Project of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/132101]
专题	中国科学院地理科学与资源研究所
通讯作者	Xue, Sha
作者单位	1.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 2.Xian Univ Technol, State Key Lab Ecohydraul Northwest Arid Reg China, Xian 710048, Shaanxi, Peoples R China 3.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Xiao, Lie,Liu, Guobin,Li, Peng,et al. Direct and indirect effects of elevated CO2 and nitrogen addition on soil microbial communities in the rhizosphere of Bothriochloa ischaemum[J]. JOURNAL OF SOILS AND SEDIMENTS,2019,19(11):3679-3687.
APA	Xiao, Lie,Liu, Guobin,Li, Peng,&Xue, Sha.(2019).Direct and indirect effects of elevated CO2 and nitrogen addition on soil microbial communities in the rhizosphere of Bothriochloa ischaemum.JOURNAL OF SOILS AND SEDIMENTS,19(11),3679-3687.
MLA	Xiao, Lie,et al."Direct and indirect effects of elevated CO2 and nitrogen addition on soil microbial communities in the rhizosphere of Bothriochloa ischaemum".JOURNAL OF SOILS AND SEDIMENTS 19.11(2019):3679-3687.