Shifts in priming partly explain impacts of long-term nitrogen input in different chemical forms on soil organic carbon storage

doi:10.1111/gcb.14304

	Shifts in priming partly explain impacts of long-term nitrogen input in different chemical forms on soil organic carbon storage
	Song, Minghua 1; Guo, Yu 1,2; Yu, Feihai 3; Zhang, Xianzhou 1; Cao, Guangmin 4; Cornelissen, Johannes H. C.5
刊名	GLOBAL CHANGE BIOLOGY
	2018-09-01
卷号	24 期号:9 页码:4160-4172
关键词	alpine meadow functional groups nitrogen chemical form priming effect soil microbes soil organic carbon Tibetan Plateau
ISSN号	1354-1013
DOI	10.1111/gcb.14304
通讯作者	Song, Minghua(songmh@igsnrr.ac.cn) ; Yu, Feihai(feihaiyu@126.com)
英文摘要	Input of labile organic carbon can enhance decomposition of extant soil organic carbon (SOC) through priming. We hypothesized that long-term nitrogen (N) input in different chemical forms alters SOC pools by altering priming effects associated with N-mediated changes in plants and soil microbes. The hypothesis was tested by integrating field experimental data of plants, soil microbes and two incubation experiments with soils that had experienced 10years of N enrichment with three chemical forms (ammonium, nitrate and both ammonium and nitrate) in an alpine meadow on the Tibetan Plateau. Incubations with glucose-C-13 addition at three rates were used to quantify effects of exogenous organic carbon input on the priming of SOC. Incubations with microbial inocula extracted from soils that had experienced different long-term N treatments were conducted to detect effects of N-mediated changes in soil microbes on priming effects. We found strong evidence and a mechanistic explanation for alteration of SOC pools following 10years of N enrichment with different chemical forms. We detected significant negative priming effects both in soils collected from ammonium-addition plots and in sterilized soils inoculated with soil microbes extracted from ammonium-addition plots. In contrast, significant positive priming effects were found both in soils collected from nitrate-addition plots and in sterilized soils inoculated with soil microbes extracted from nitrate-addition plots. Meanwhile, the abundance and richness of graminoids were higher and the abundance of soil microbes was lower in ammonium-addition than in nitrate-addition plots. Our findings provide evidence that shifts toward higher graminoid abundance and changes in soil microbial abundance mediated by N chemical forms are key drivers for priming effects and SOC pool changes, thereby linking human interference with the N cycle to climate change.
资助项目	National Natural Science Foundation of China[41671263] ; Royal Netherlands Academy of Arts and Sciences (KNAW, CEP)[12CDP007] ; National key research and development program[2016YFC0501803] ; National key research and development program[2016YFC0502001]
WOS关键词	LITTER DECOMPOSITION RATES ; MICROBIAL COMMUNITIES ; ALPINE MEADOW ; ARCTIC TUNDRA ; TERRESTRIAL ECOSYSTEMS ; SPECIES RICHNESS ; PLANT DIVERSITY ; BOREAL FOREST ; DEPOSITION ; FERTILIZATION
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
语种	英语
出版者	WILEY
WOS记录号	WOS:000441746900023
资助机构	National Natural Science Foundation of China ; Royal Netherlands Academy of Arts and Sciences (KNAW, CEP) ; National key research and development program
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/54435]
专题	中国科学院地理科学与资源研究所
通讯作者	Song, Minghua; Yu, Feihai
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, A11,Datun Rd, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Taizhou Univ, Zhejiang Prov Key Lab Plant Evolutionary Ecol & C, Taizhou 318000, Peoples R China 4.Chinese Acad Sci, Northwest Inst Plateau Biol, Xining, Qinghai, Peoples R China 5.Vrije Univ, Fac Sci, Dept Ecol Sci, Syst Ecol, Amsterdam, Netherlands
推荐引用方式 GB/T 7714	Song, Minghua,Guo, Yu,Yu, Feihai,et al. Shifts in priming partly explain impacts of long-term nitrogen input in different chemical forms on soil organic carbon storage[J]. GLOBAL CHANGE BIOLOGY,2018,24(9):4160-4172.
APA	Song, Minghua,Guo, Yu,Yu, Feihai,Zhang, Xianzhou,Cao, Guangmin,&Cornelissen, Johannes H. C..(2018).Shifts in priming partly explain impacts of long-term nitrogen input in different chemical forms on soil organic carbon storage.GLOBAL CHANGE BIOLOGY,24(9),4160-4172.
MLA	Song, Minghua,et al."Shifts in priming partly explain impacts of long-term nitrogen input in different chemical forms on soil organic carbon storage".GLOBAL CHANGE BIOLOGY 24.9(2018):4160-4172.