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Seasonality of gross ammonification and nitrification altered by precipitation in a semi-arid grassland of Northern China

文献类型：期刊论文

作者Wang, Nannan1,6; Li, Lei6; Dannenmann, Michael2; Luo, Yukun3; Xu, Xiaohui6; Zhang, Bingwei4,6; Chen, Shiping; Dong, Kuanhu3; Huang, Jianhui6; Xu, Xiaofeng1
刊名SOIL BIOLOGY & BIOCHEMISTRY
出版日期2021
卷号154
关键词Extreme drought Mineralization Nitrogen turnover Seasonal dynamics Substrate
ISSN号0038-0717
DOI10.1016/j.soilbio.2021.108146
文献子类Article
英文摘要Gross ammonification (GA) and gross nitrification (GN) are key regulators of the bioavailability of nitrogen (N) in terrestrial ecosystems. In arid and semi-arid grassland ecosystems, the impacts of precipitation change on in situ GA and GN and their seasonal variations are understudied. A manipulative experiment with five precipitation levels (-60%, -30%, unchanged ambient precipitation as control, +30%, +60% of ambient precipitation) was set up in May 2012. After a 2-year equilibration period, the N-15 pool dilution technique was applied to determine GA and GN rates in surface soil (0-5 cm) within 8 sampling dates ranging from the onset to the end of the growing season. Pronounced temporal variability of GA and GN rates were observed with the highest GA and GN rates in the mid-growing season (August) and the lowest in the post-growing season (October). GA rates during the growing season were primarily controlled by precipitation and soil water availability, while this effect diminished at the onset and end of the growing season when the temperature dropped. In contrast, GN was predominately controlled by ammonium (NH4+) production through GA. In the peak-growing season, the +60% precipitation treatment enhanced GA and GN rates by up to 4-fold, while the -30% precipitation treatment marginally suppressed GA and GN rates. The -60% precipitation treatment suppressed GA and GN rates to below detection limits across the entire study period, suggesting that extreme and persistent droughts greatly inhibited N turnover in the surface soil, thereby forcing plants to mobilize and access nutrients from deeper soil layers. Our findings provide a season-specific mechanistic insight into precipitation impacts on topsoil gross N turnover and suggest that the N cycling represented in ecosystem models needs to consider a mechanism that allows a strong suppression of microbial functions under extreme droughts.
学科主题Soil Science
出版地OXFORD
电子版国际标准刊号1879-3428
WOS研究方向Science Citation Index Expanded (SCI-EXPANDED)
语种英语
WOS记录号WOS:000626605100018
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构Chinese National Key Development Program for Basic Research [2017YFA0604802, 2016YFC0500703] ; National Natural Science Foundation of China [31770526, 31872406] ; San Diego State University ; CSU Program for Education & Research in Biotechnology ; SUSALPS project - German Federal Ministry of Education and Science
源URL[http://ir.ibcas.ac.cn/handle/2S10CLM1/26643]  
专题植被与环境变化国家重点实验室
作者单位1.Univ Chinese Acad Sci, Beijing 100080, Peoples R China
2.San Diego State Univ, Biol Dept, San Diego, CA 92182 USA
3.Karlsruhe Inst Technol, Inst Meteorol & Climate Res, Atmospher Environm Res, D-82467 Garmisch Partenkirchen, Germany
4.Shanxi Agr Univ, Coll Grassland Sci, Taigu 030801, Peoples R China
5.Beijing Normal Univ Zhuhai, Zhuhai Branch, State Key Lab Earth Surface Proc & Resource Ecol, Zhuhai 519087, Peoples R China
6.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Nannan,Li, Lei,Dannenmann, Michael,et al. Seasonality of gross ammonification and nitrification altered by precipitation in a semi-arid grassland of Northern China[J]. SOIL BIOLOGY & BIOCHEMISTRY,2021,154.
APA Wang, Nannan.,Li, Lei.,Dannenmann, Michael.,Luo, Yukun.,Xu, Xiaohui.,...&Wang, Changhui.(2021).Seasonality of gross ammonification and nitrification altered by precipitation in a semi-arid grassland of Northern China.SOIL BIOLOGY & BIOCHEMISTRY,154.
MLA Wang, Nannan,et al."Seasonality of gross ammonification and nitrification altered by precipitation in a semi-arid grassland of Northern China".SOIL BIOLOGY & BIOCHEMISTRY 154(2021).

入库方式： OAI收割

来源：植物研究所

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