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Nitrogen deposition differentially affects soil gross nitrogen transformations in organic and mineral horizons

文献类型：期刊论文

作者Cheng, Yi12; Wang, Jing11; Wang, Jinyang10; Wang, Shenqiang9; Chang, Scott X.8; Cai, Zucong7,12; Zhang, Jinbo4,5,6,12; Niu, Shuli3; Hu, Shuijin1,2
刊名EARTH-SCIENCE REVIEWS
出版日期2020-02-01
卷号201页码:7
关键词Net N mineralization Gross mineralization Gross nitrification Gross NH4(+) and NO3(-) immobilization Nitrogen deposition Microbial biomass
ISSN号0012-8252
DOI10.1016/j.earscirev.2019.103033
英文摘要Reactive nitrogen (N) input can profoundly alter soil N transformations and long-term productivity of forest ecosystems. However, critical knowledge gaps exist in our understanding of N deposition effects on internal soil N cycling in forest ecosystems. It is well established that N addition enhances soil N availability based on traditional net mineralization rate assays. Yet, experimental additions of inorganic N to soils broadly show a suppression of microbial activity and protein depolymerization. Here we show, from a global meta-analysis of N-15-labelled studies that gross N transformation rates in forest soil organic and mineral horizons differentially respond to N addition. In carbon (C)-rich organic horizons, N addition significantly enhanced soil gross rates of N mineralization, nitrification and microbial NO3- immobilization rates, but decreased gross microbial NH4+ immobilization rates. In C-poor mineral soils, in contrast, N addition did not change gross N transformation rates except for increasing gross nitrification rates. An initial soil C/N threshold of approx. 14.6, above which N addition enhanced gross N mineralization rates, could explain why gross N mineralization was increased by N deposition in organic horizons alone. Enhancement of gross N mineralization by N deposition was also largely attributed to enhanced N mineralization activity per unit microbial biomass. Our results indicate that the net effect of N input on forest soil gross N transformations are highly stratified by soil C distribution along the soil profile, and thus challenge the perception that N availability ubiquitously limits N mineralization. These findings suggest that these differences should be integrated into models to better predict forest ecosystem N cycle and C sequestration potential under future N deposition scenarios.
WOS关键词ATMOSPHERIC NITRATE DEPOSITION ; TERRESTRIAL ECOSYSTEMS ; FOREST SOILS ; METAANALYSIS ; INPUTS ; CYCLE ; NITRIFICATION ; SATURATION ; GRASSLAND ; ADDITIONS
资助项目National Natural Science Foundation of China[41977081] ; National Natural Science Foundation of China[41807093] ; National Natural Science Foundation of China[41622104] ; National Natural Science Foundation of China[41830642] ; National Key Research and Development Program of China[2017YFD0200106] ; National Key Research and Development Program of China[2017YFD0800103]
WOS研究方向Geology
语种英语
WOS记录号WOS:000520949700014
出版者ELSEVIER
资助机构National Natural Science Foundation of China ; National Key Research and Development Program of China
源URL[http://ir.igsnrr.ac.cn/handle/311030/133199]  
专题生态系统网络观测与模拟院重点实验室_外文论文
作者单位1.Nanjing Agr Univ, Coll Resources & Environm Sci, Nanjing 210095, Peoples R China
2.North Carolina State Univ, Dept Entomol & Plant Pathol, Raleigh, NC 27695 USA
3.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
4.Jiangsu Prov Key Lab Mat Cycling & Pollut Control, Nanjing 210023, Peoples R China
5.State Key Lab Cultivat Base Geog Environm Evolut, Nanjing 210023, Peoples R China
6.Jiangsu Ctr Collaborat Innovat Geog Informat Reso, Nanjing 210023, Peoples R China
7.Nanjing Normal Univ, Minist Educ, Key Lab Virtual Geog Environm, Nanjing 210023, Peoples R China
8.Univ Alberta, Dept Renewable Resources, 442 Earth Sci Bldg, Edmonton, AB T6G 2E3, Canada
9.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China
10.Bangor Univ, Sch Environm Nat Resources & Geog, Bangor LL57 2UW, Gwynedd, Wales
推荐引用方式
GB/T 7714		 Cheng, Yi,Wang, Jing,Wang, Jinyang,et al. Nitrogen deposition differentially affects soil gross nitrogen transformations in organic and mineral horizons[J]. EARTH-SCIENCE REVIEWS,2020,201:7.
APA Cheng, Yi.,Wang, Jing.,Wang, Jinyang.,Wang, Shenqiang.,Chang, Scott X..,...&Hu, Shuijin.(2020).Nitrogen deposition differentially affects soil gross nitrogen transformations in organic and mineral horizons.EARTH-SCIENCE REVIEWS,201,7.
MLA Cheng, Yi,et al."Nitrogen deposition differentially affects soil gross nitrogen transformations in organic and mineral horizons".EARTH-SCIENCE REVIEWS 201(2020):7.

入库方式： OAI收割

来源：地理科学与资源研究所

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