Do warming-induced changes in quantity and stoichiometry of root exudation promote soil N transformations via stimulation of soil nitrifiers,denitrifiers and ammonifiers?

doi:10.1016/j.ejsobi.2016.03.007

	Do warming-induced changes in quantity and stoichiometry of root exudation promote soil N transformations via stimulation of soil nitrifiers,denitrifiers and ammonifiers?
	Zhang, Ziliang 1,2; Qiao, Mingfeng 1,2; Li, Dandan 1,3; Yin, Huajun 1; Liu, Qing 1
刊名	EUROPEAN JOURNAL OF SOIL BIOLOGY
	2016
卷号	74 页码:60-68
关键词	Root exudation Picea asperata Soil N transformations Bacteria Warming
ISSN号	1164-5563
DOI	10.1016/j.ejsobi.2016.03.007
产权排序	1
文献子类	Article
英文摘要	Despite the recognized importance of root exudation to soil biogeochemical processes and soil function in forest ecosystems, few studies have investigated the impact of quantity and stoichiometry of root exudation on soil nitrogen (N) transformations. In addition, the potential mechanism of how climate warming influences soil N cycling via root-soil interactions remains unclear. We performed an experiment in which in situ root exudates were collected from Picea asperata seedling to examine the response of root carbon (C) & N exudation rates and the C: N ratio stoichiometry along with the soil N transformation rates to warming using infrared heaters in the Eastern Tibetan Plateau. The results showed that warming enhanced root C exudation rates (ug C g(-1) root biomass h(-1)), with higher C: N ratio stoichiometry simultaneously. Experimental warming also significantly increased the soil net mineralization rates, net nitrification rates, and denitrification rates. Then, we conducted an in vitro experiment in which three bacterial strains (Bacillus subtilis, Nitrobacter hamburgensis, and Brachymonas denitrificans) representing ammonifiers, nitrifiers, and denitrifiers, respectively, were cultured with exudates as the culture media. The results indicated that root exudates collected in warmed plots significantly stimulated the growth of the three soil N transformation bacteria, compared with the treatments in control plots. Collectively, our results, to some degree, evidence a linkage that climate warming-induced changes in C fluxes and C: N ratio stoichiometry of root exudation stimulated the growth and reproduction of soil N transformation bacteria, consequently accelerating the soil organic matter decomposition and soil N transformations. (C) 2016 Elsevier Masson SAS. All rights reserved.
学科主题	Environment/ecology
URL标识	查看原文
WOS关键词	EASTERN TIBETAN PLATEAU ; ORGANIC-MATTER DECOMPOSITION ; CLIMATE-CHANGE ; MICROBIAL COMMUNITIES ; NITROGEN TRANSFORMATIONS ; BACTERIAL COMMUNITIES ; ALPINE MEADOW ; CARBON MINERALIZATION ; CONIFEROUS FOREST ; TALLGRASS PRAIRIE
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
语种	英语
出版者	ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
WOS记录号	WOS:000376052700009
内容类型	期刊论文
源URL	[http://210.75.237.14/handle/351003/29904]
专题	成都生物研究所_生态研究
作者单位	1.Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Jiangsu, Peoples R China;
推荐引用方式 GB/T 7714	Zhang, Ziliang,Qiao, Mingfeng,Li, Dandan,et al. Do warming-induced changes in quantity and stoichiometry of root exudation promote soil N transformations via stimulation of soil nitrifiers,denitrifiers and ammonifiers?[J]. EUROPEAN JOURNAL OF SOIL BIOLOGY,2016,74:60-68.
APA	Zhang, Ziliang,Qiao, Mingfeng,Li, Dandan,Yin, Huajun,&Liu, Qing.(2016).Do warming-induced changes in quantity and stoichiometry of root exudation promote soil N transformations via stimulation of soil nitrifiers,denitrifiers and ammonifiers?.EUROPEAN JOURNAL OF SOIL BIOLOGY,74,60-68.
MLA	Zhang, Ziliang,et al."Do warming-induced changes in quantity and stoichiometry of root exudation promote soil N transformations via stimulation of soil nitrifiers,denitrifiers and ammonifiers?".EUROPEAN JOURNAL OF SOIL BIOLOGY 74(2016):60-68.