Organic nitrogen addition causes decoupling of microbial nitrogen cycles by stimulating gross nitrogen transformation in a temperate forest soil
文献类型：期刊论文
| 作者 | Lu, Mingzhu2,3; Cheng, Shulan3; Fang, Huajun2,3,4; Xu, Meng2; Yang, Yan2,3; Li, Yuna3; Zhang, Jinbo1; Mueller, Christoph5,6 |
| 刊名 | GEODERMA
 |
| 出版日期 | 2021-03-01 |
| 卷号 | 385页码:9 |
| 关键词 | Organic N deposition Gross N transformations N-15 tracing model Microbial group abundances Temperate needle-broadleaved mixed forest |
| ISSN号 | 0016-7061 |
| DOI | 10.1016/j.geoderma.2020.114886 |
| 通讯作者 | Fang, Huajun(fanghj@igsnrr.ac.cn) |
| 英文摘要 | External inorganic and organic nitrogen (N) inputs can contrastingly affect the transformation and availability of N in forest soils. Studies have mainly focused on the effects of inorganic N enrichment, whereas little is known about the effects of organic N input on soil gross N transformation and the underlying microbial mechanisms. Here we conducted a laboratory N-15 tracing study in a temperate needle-broadleaved mixed forest with a fertilization rate of 0, 20, 60, and 120 kg urea-N ha(-1) yr(-1) over three years. We investigated the key drivers of soil N transformation processes using a 15 N tracing model in the context of selected soil chemical properties and microbial characteristics. Urea addition did not change soil gross N mineralization rates, while stimulating mineralization of labile organic N (M-Nlab). Urea addition at a rate of 120 kg N ha(-1) yr(-1) significantly increased autotrophic nitrification and gross nitrification rates by 88% and 96%, respectively. In contrast, all the three levels of urea addition significantly reduced gross microbial N immobilization by 28% to 52%, leading to an increase in the accumulation of soil NO3--N in the top 10 cm soil layer by 38% to 88%. The changes in autotrophic nitrification were primarily driven by acid-tolerant ammonia-oxidizing archaea (AOA). Fungi were responsible for the change in heterotrophic nitrification under organic N enrichment. Gross N transformation rates were predominately regulated by AOA and fungal abundances as well as soil NO3--N content under high level of organic N addition. The response of soil N transformation to exogenous organic N input depended on N addition level with the threshold rate being estimated to be 60-120 kg N ha(-1) yr(-1) . All lines of evidence showed that the temperate needle-broadleaved mixed forest is moving towards an opener microbial N cycle under elevated organic N deposition. Our finding suggests that the effect of organic N input on soil gross N transformation is different from that of inorganic N input, which should be considered in ecosystem process models. |
| WOS关键词 | NONLINEAR RESPONSES ; SUBTROPICAL FOREST ; N TRANSFORMATIONS ; AMMONIA OXIDATION ; SIMULATED N ; DEPOSITION ; NITRATE ; ARCHAEA ; NITRIFICATION ; LIMITATION |
| 资助项目 | Second Tibetan Plateau Scientific Expedition and Research Program (STEP)[2019QZKK1003] ; National Natural Science Foundation of China[41977041] ; National Natural Science Foundation of China[31770558] ; National Natural Science Foundation of China[41907036] ; National Key R&D Program of China[2017YFA0604802] ; National Key R&D Program of China[2017YFA0604804] ; National Key R&D Program of China[2016YFC0500603] ; National Key R&D Program of China[2016YFC0503603] ; CAS Strategic Priority Program[XDA200204020] ; CAS Strategic Priority Program[XDA23060401] ; Thousand Talents Plan Project of High-End Innovative Talents of Qinghai Province (TTPPHEITQP-2019) |
| WOS研究方向 | Agriculture |
| 语种 | 英语 |
| WOS记录号 | WOS:000609999200035 |
| 出版者 | ELSEVIER |
| 资助机构 | Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; National Natural Science Foundation of China ; National Key R&D Program of China ; CAS Strategic Priority Program ; Thousand Talents Plan Project of High-End Innovative Talents of Qinghai Province (TTPPHEITQP-2019) |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/136124]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Fang, Huajun |
| 作者单位 | 1.Nanjing Normal Univ, Sch Geog Sci, Nanjing 210023, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Northwest Plateau Inst Biol, Xining 810001, Qinghai, Peoples R China 5.Univ Coll Dublin, Sch Biol & Environm Sci, Dublin 4, Ireland 6.Justus Liebig Univ Giessen, Inst Plant Ecol, Giessen, Germany |
| 推荐引用方式 GB/T 7714 | Lu, Mingzhu,Cheng, Shulan,Fang, Huajun,et al. Organic nitrogen addition causes decoupling of microbial nitrogen cycles by stimulating gross nitrogen transformation in a temperate forest soil[J]. GEODERMA,2021,385:9. |
| APA | Lu, Mingzhu.,Cheng, Shulan.,Fang, Huajun.,Xu, Meng.,Yang, Yan.,...&Mueller, Christoph.(2021).Organic nitrogen addition causes decoupling of microbial nitrogen cycles by stimulating gross nitrogen transformation in a temperate forest soil.GEODERMA,385,9. |
| MLA | Lu, Mingzhu,et al."Organic nitrogen addition causes decoupling of microbial nitrogen cycles by stimulating gross nitrogen transformation in a temperate forest soil".GEODERMA 385(2021):9. |
入库方式： OAI收割
来源：地理科学与资源研究所
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