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Multilevel Nitrogen Additions Alter Chemical Composition and Turnover of the Labile Fraction Soil Organic Matter via Effects on Vegetation and Microorganisms

文献类型：期刊论文

作者Chen, Qiuyu6,7,9; Niu, Bin1,7; Hu, Yilun1,7; Wang, Jian2; Lei, Tianzhu3; Xu-Ri7; Zhou, Jizhong4,5; Xi, Chuanwu8; Zhang, Gengxin6,7,9
刊名JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
出版日期2020-04-01
卷号125期号:4页码:e2019JG005316
ISSN号2169-8953
DOI10.1029/2019JG005316
通讯作者Zhang, Gengxin(zhangg@itpcas.ac.cn)
产权排序5
文献子类Article
英文摘要Global nitrogen (N) deposition greatly impacts soil carbon sequestration. A 2-yr multiple N addition (0, 10, 20, 40, 80, and 160 kg N.ha(-1).yr(-1)) experiment was conducted in alpine grassland to illustrate the mechanisms underlying the observed soil organic matter (SOM) dynamics on the Qinghai-Tibet Plateau (QTP). Labile fraction SOM (LF-SOM) fingerprints were characterized by pyrolysis-gas chromatography/tandem-mass spectrometry, and microbial functional genes (GeoChip 4.6) were analyzed in conjunction with LF-SOM fingerprints to decipher the responses of LF-SOM transformation to N additions. The significant correlations between LF-SOM and microbial biomass, between organic compounds in LF-SOM and compound degradation-related genes, and between LF-SOM and net ecosystem exchange implied LF-SOM were the main fraction utilized by microorganisms and the most sensitive fraction to N additions. The LF-SOM increased at the lowest N addition levels (10 and 20 kg N.ha(-1).yr(-1)) and decreased at higher N addition levels (40 to 160 kg N.ha(-1).yr(-1)), but the decrease of LF-SOM was weakened at 160 kg N.ha(-1).yr(-1) addition. The nonlinear response of LF-SOM to N additions was due to the mass balance between plant inputs and microbial degradation. Plant-derived compounds in LF-SOM were more sensitive to N addition than microbial-derived and aromatic compounds. It is predicted that when the N deposition rate increased by 10 kg N.ha(-1).yr(-1) on the QTP, carbon sequestration in the labile fraction may increase by nearly 170% compared with that under the current N deposition rate. These findings provide insight into future N deposition impacts on LF-SOM preservation on the QTP.
电子版国际标准刊号2169-8961
WOS关键词ALPINE MEADOW SOIL ; COMMUNITY COMPOSITION ; MICROBIAL COMMUNITY ; FERTILIZATION DECREASES ; MASS-SPECTROMETRY ; TIBETAN PLATEAU ; PYROLYSIS-GC/MS ; CARBON ; DEPOSITION ; PLANT
资助项目National Natural Science Foundation of China[41871066] ; National Natural Science Foundation of China[41471055] ; National Natural Science Foundation of China[41775161] ; Strategic Priority Research Program (A) of the Chinese Academy of Sciences[XDA20050101] ; Strategic Priority Research Program (A) of the Chinese Academy of Sciences[XDA20050102] ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP)[2019QZKK0503]
WOS研究方向Environmental Sciences & Ecology ; Geology
语种英语
出版者AMER GEOPHYSICAL UNION
WOS记录号WOS:000535659000010
资助机构National Natural Science Foundation of China ; Strategic Priority Research Program (A) of the Chinese Academy of Sciences ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP)
源URL[http://ir.imde.ac.cn/handle/131551/34773]  
专题成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
作者单位1.Univ Chinese Acad Sci, Beijing, Peoples R China;
2.Chinese Acad Sci, Key Lab Mt Surface Proc & Ecol Regulat, Inst Mt Hazards & Environm, Chengdu, Peoples R China;
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Lanzhou, Peoples R China;
4.Univ Oklahoma, Dept Microbiol & Plant Biol, Inst Environm Genom, Norman, OK 73019 USA;
5.Univ Oklahoma, Sch Civil Engn & Environm Sci, Inst Environm Genom, Norman, OK 73019 USA;
6.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Key Lab Alpine Ecol, Beijing, Peoples R China;
7.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol, Beijing, Peoples R China;
8.Univ Michigan, Sch Publ Hlth, Dept Environm Hlth Sci, Ann Arbor, MI 48109 USA
9.Chinese Acad Sci, Inst Tibetan Plateau Res, Beijing, Peoples R China;
推荐引用方式
GB/T 7714		 Chen, Qiuyu,Niu, Bin,Hu, Yilun,et al. Multilevel Nitrogen Additions Alter Chemical Composition and Turnover of the Labile Fraction Soil Organic Matter via Effects on Vegetation and Microorganisms[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2020,125(4):e2019JG005316.
APA Chen, Qiuyu.,Niu, Bin.,Hu, Yilun.,Wang, Jian.,Lei, Tianzhu.,...&Zhang, Gengxin.(2020).Multilevel Nitrogen Additions Alter Chemical Composition and Turnover of the Labile Fraction Soil Organic Matter via Effects on Vegetation and Microorganisms.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,125(4),e2019JG005316.
MLA Chen, Qiuyu,et al."Multilevel Nitrogen Additions Alter Chemical Composition and Turnover of the Labile Fraction Soil Organic Matter via Effects on Vegetation and Microorganisms".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 125.4(2020):e2019JG005316.

入库方式： OAI收割

来源：成都山地灾害与环境研究所

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