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Fungi-dominant heterotrophic nitrification in a subtropical forest soil of China

文献类型：期刊论文

作者Zhu, Tongbin1,2,3; Meng, Tianzhu1; Zhang, Jinbo1; Zhong, Wenhui1; Mueller, Christoph1,4; Cai, Zucong1
刊名JOURNAL OF SOILS AND SEDIMENTS
出版日期2015-03-01
卷号15期号:3页码:705-709
关键词N-15 tracing Coniferous forest Fungi Heterotrophic nitrification
ISSN号1439-0108
DOI10.1007/s11368-014-1048-4
通讯作者Cai, ZC (reprint author), Nanjing Normal Univ, Coll Geog Sci, Jiangsu Prov Key Lab Mat Cycling & Pollut Control, Nanjing 210097, Jiangsu, Peoples R China.
英文摘要Microorganisms play important ecological roles in NO3 (-) pool production, e.g., through autotrophic nitrification (the oxidation of NH4 (+) to NO3 (-)) and heterotrophic nitrification (the oxidation of organic N to NO3 (-)). Previous studies have mainly focused on nitrifying microorganisms capable of autotrophic nitrification; however, the contribution of microorganisms to heterotrophic nitrification has not been well investigated. The aim of this study was to identify the contribution of fungi and bacteria to autotrophic nitrification and heterotrophic nitrification in a subtropical coniferous forest soil of China. A N-15 tracing experiment was conducted in a subtropical forest soil, which was treated with CK (no antibiotics), cycloheximide (fungal inhibitor), and streptomycin (bacterial inhibitor), respectively. Soil was incubated at 25 A degrees C with 60 % water holding capacity (WHC) for 144 h after being labeled with (NH4NO3)-N-15 or NH4 (NO3)-N-15 at a 20 atom% N-15 excess. Autotrophic and heterotrophic nitrification rates were calculated using a full process-based N cycle model. The net nitrification rates were negative in all treatments, ranging from -0.346 mg N kg(-1) day(-1) in the cycloheximide treatment to -0.179 mg N kg(-1) day(-1) in the streptomycin treatment. The autotrophic nitrification was almost negligible (only 0.001 mg N kg(-1) day(-1)) in the soil from subtropical coniferous forest, while heterotrophic nitrification rate was 0.993 mg N kg(-1) day(-1). Streptomycin reduced heterotrophic nitrification rate by 22.1 %, while cycloheximide nearly completely inhibited this process. Laboratory results showed that heterotrophic nitrification is a pivotal process producing NO3 (-) and that fungi rather than bacteria may dominate heterotrophic nitrification in the subtropical coniferous forest soil.
资助项目National Natural Science Foundation of China[41330744] ; National Natural Science Foundation of China[41301313] ; National Natural Science Foundation of China[41222005] ; Research Fund of State Key Laboratory of Soil and Sustainable Agriculture ; Nanjing Institute of Soil Science ; Chinese Academy of Science[0812201211] ; Outstanding Innovation Team in Colleges and Universities in Jiangsu Province ; Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application ; Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
WOS研究方向Geology ; Agriculture
语种英语
WOS记录号WOS:000349605100020
出版者SPRINGER HEIDELBERG
源URL[http://119.78.100.138/handle/2HOD01W0/1430]  
专题中国科学院重庆绿色智能技术研究院
通讯作者Cai, Zucong
作者单位1.Nanjing Normal Univ, Coll Geog Sci, Jiangsu Prov Key Lab Mat Cycling & Pollut Control, Nanjing 210097, Jiangsu, Peoples R China
2.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing, Jiangsu, Peoples R China
3.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Key Lab Reservoir Aquat Environm, Chongqing 400714, Peoples R China
4.Univ Giessen, Dept Plant Ecol, D-35392 Giessen, Germany
推荐引用方式
GB/T 7714		 Zhu, Tongbin,Meng, Tianzhu,Zhang, Jinbo,et al. Fungi-dominant heterotrophic nitrification in a subtropical forest soil of China[J]. JOURNAL OF SOILS AND SEDIMENTS,2015,15(3):705-709.
APA Zhu, Tongbin,Meng, Tianzhu,Zhang, Jinbo,Zhong, Wenhui,Mueller, Christoph,&Cai, Zucong.(2015).Fungi-dominant heterotrophic nitrification in a subtropical forest soil of China.JOURNAL OF SOILS AND SEDIMENTS,15(3),705-709.
MLA Zhu, Tongbin,et al."Fungi-dominant heterotrophic nitrification in a subtropical forest soil of China".JOURNAL OF SOILS AND SEDIMENTS 15.3(2015):705-709.

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来源：重庆绿色智能技术研究院

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