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

doi:10.1016/j.earscirev.2019.103033

	Nitrogen deposition differentially affects soil gross nitrogen transformations in organic and mineral horizons
	Cheng, Yi 9; Wang, Jing 10; Wang, Jinyang 11; Wang, Shenqiang 12; Chang, Scott X.2; Cai, Zucong 3,9; Zhang, Jinbo 1,7,8,9; Niu, Shuli 6; Hu, Shuijin 4,5
刊名	EARTH-SCIENCE REVIEWS
	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
DOI	10.1016/j.earscirev.2019.103033
通讯作者	Zhang, Jinbo(zhangjinbo@njnu.edu.cn) ; Niu, Shuli(sniu@igsnrr.ac.cn) ; Hu, Shuijin(shuijin_hu@ncsu.edu)
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.
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关键词	ATMOSPHERIC NITRATE DEPOSITION ; TERRESTRIAL ECOSYSTEMS ; FOREST SOILS ; METAANALYSIS ; INPUTS ; CYCLE ; NITRIFICATION ; SATURATION ; GRASSLAND ; ADDITIONS
WOS研究方向	Geology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000520949700014
资助机构	National Natural Science Foundation of China ; National Key Research and Development Program of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/133199]
专题	中国科学院地理科学与资源研究所
通讯作者	Zhang, Jinbo; Niu, Shuli; Hu, Shuijin
作者单位	1.State Key Lab Cultivat Base Geog Environm Evolut, Nanjing 210023, Peoples R China 2.Univ Alberta, Dept Renewable Resources, 442 Earth Sci Bldg, Edmonton, AB T6G 2E3, Canada 3.Nanjing Normal Univ, Minist Educ, Key Lab Virtual Geog Environm, Nanjing 210023, Peoples R China 4.North Carolina State Univ, Dept Entomol & Plant Pathol, Raleigh, NC 27695 USA 5.Nanjing Agr Univ, Coll Resources & Environm Sci, Nanjing 210095, Peoples R China 6.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 7.Jiangsu Prov Key Lab Mat Cycling & Pollut Control, Nanjing 210023, Peoples R China 8.Jiangsu Ctr Collaborat Innovat Geog Informat Reso, Nanjing 210023, Peoples R China 9.Nanjing Normal Univ, Sch Geog, Nanjing 210023, Peoples R China 10.Nanjing Forestry Univ, Coll Forestry, Nanjing 210037, Peoples R China
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.