IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Urea addition and litter manipulation alter plant community and soil microbial community composition in a Kobresia humilis meadow
Wang, Changting1; Wang, Genxu2; Wang, Yong1; Rafique, Rashid3; Ma, Li1; Hu, Lei1; Luo, Yiqi3
Corresponding AuthorWang, Changting
2015-09-01
Source PublicationEUROPEAN JOURNAL OF SOIL BIOLOGY
ISSN1164-5563
Volume70Pages:7-14
SubtypeArticle
AbstractOvergrazing and climate change strongly affect alpine meadows by decreasing the plant community biomass and deteriorating the soil environment. To understand how the plant community and soil microbial community structure respond to grazing and N deposition, we conducted an experiment to remove or maintain the plant litter under the chronic addition of N in the Haibei Alpine Meadow in 2005. The experiment included four treatments: added N (+N, 20 g m(-2)) with the litter removed (LR), +N with the litter left intact (LI), LI without N addition (N), and LR with N. Soil samples were collected at depths of 0-10 and 10-20 cm, and the following parameters were measured: 1) aboveground biomass (AGB) and litter biomass and 2) microbial community composition and content. Overall, the AGB and litter biomass significantly increased by 45.85% and 50.42% in response to N addition, whereas litter removal increased the AGB by 52.96%. The addition of urea N significantly decreased the PLFA content of the bacterial, gram-positive (G(+)), gram-negative (G(-)) at a soil of 0-10 cm in the LI and LR treatments by 64.87%, 61.82%, 76.07% and 64.86%, 53.02%, 51.44%, respectively. However, the PLFA content of the bacterial increased from 37.09 to 53.54 nmol g(-1) and from 37.09 to 62.05 nmol g(-1) at a depth of 10-20 cm for the +N + LI and +N + LR treatments compare to the LR+(-)N treatment, respectively. In addition, the total PLFAs in the LR+(-)N treatment significantly increased by 50.61% at a depth of 0-10 cm but decreased from 121.62 to 4231 nmol g(-1) at a depth of 10-20 cm relative to the LI+(-)N treatment. Using PLFA as a biomarker, we detected that G(-) bacteria and total PLFA generally increased with increasing soil depth in the +N plots. However, the content of G(-) was the highest at a depth of 0-10 cm and the lowest at a depth of 10-20 cm in the LR plots. The modification of soil microbial biomass at a depth of 0-10 cm was induced by the bottom-up effect of changes in soil nutrient contents and using ability, which were driven by N addition and litter manipulation. Thus, different soil depths with different soil nutrient conditions resulted in a strong microbial community composition gradient. (C) 2015 Published by Elsevier Masson SAS.
KeywordLitter Biomass Aboveground Biomass (Agb) Urea Addition Soil Microbial Community Phospholipid Fatty Acid (Plfa) Alpine Meadow
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1016/j.ejsobi.2015.06.003
WOS Subject ExtendedEnvironmental Sciences & Ecology ; Agriculture
Indexed BySCI
WOS KeywordFATTY-ACID ANALYSIS ; ARBUSCULAR MYCORRHIZAL FUNGI ; NITROGEN ADDITION ; ALPINE MEADOW ; ENZYME-ACTIVITIES ; UPLAND GRASSLAND ; BIOMASS ; FERTILIZATION ; BIOTA ; PRODUCTIVITY
Language英语
WOS SubjectEcology ; Soil Science
WOS IDWOS:000362147900002
Funding OrganizationNational Basic Research Program of China(2013CBA01807) ; National Natural Science Foundation of China(31370542) ; Innovation Team of Education Office of Sichuang Province(14TD0049) ; Postgraduate Degree Construction Program of the Southwest University for Nationalities(2011XWD-S071012)
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Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/11029
Collection山地表生过程与生态调控重点实验室
Affiliation1.Southwest Univ Nationalities, Coll Life Sci & Technol, Chengdu 610041, Peoples R China
2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
3.Univ Oklahoma, Dept Microbiol & Plant Biol, Norman, OK 73019 USA
Recommended Citation
GB/T 7714
Wang, Changting,Wang, Genxu,Wang, Yong,et al. Urea addition and litter manipulation alter plant community and soil microbial community composition in a Kobresia humilis meadow[J]. EUROPEAN JOURNAL OF SOIL BIOLOGY,2015,70:7-14.
APA Wang, Changting.,Wang, Genxu.,Wang, Yong.,Rafique, Rashid.,Ma, Li.,...&Luo, Yiqi.(2015).Urea addition and litter manipulation alter plant community and soil microbial community composition in a Kobresia humilis meadow.EUROPEAN JOURNAL OF SOIL BIOLOGY,70,7-14.
MLA Wang, Changting,et al."Urea addition and litter manipulation alter plant community and soil microbial community composition in a Kobresia humilis meadow".EUROPEAN JOURNAL OF SOIL BIOLOGY 70(2015):7-14.
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