Different responses of the gross nitrification rate to N enrichment in topsoil and subsoil
文献类型：期刊论文
| 作者 | Song, Lei3; Zhang, Ruiyang3; Li, Yang3; Pan, Junxiao3; Wang, Jinsong3; Yan, Yingjie3; Niu, Shuli2,3 |
| 刊名 | GEODERMA
 |
| 出版日期 | 2023-04-01 |
| 卷号 | 432 |
| ISSN号 | 1872-6259 |
| 关键词 | Nitrogen cycling Gross nitrogen transformation rates Soil depth Microbial populations N-15 stable isotope enrichment |
| DOI | 10.1016/j.geoderma.2023.116394 |
| 文献子类 | Article |
| 英文摘要 | Nitrogen (N) deposition has continually increased since the industrial revolution and its rate varies widely around the world. The dynamic of soil nitrification under N enrichment affects nitrous oxide (N2O) emissions and nitrate (NO3-) leaching which are related to current environmental problems. However, the response of soil nitrification, particularly in subsoil, to a N enrichment gradient and the mechanisms involved have not been well studied. In this study, the gross nitrification rates (GNRs) and relevant abiotic and biotic factors along a N addition gradient in a field were determined at three soil depths using a N-15-labeling method. The GNR in topsoil (0-10 cm) followed a bell-shaped curve as the N addition rate increased. The GNR in subsoil (10-20 and 20-40 cm) linearly decreased as the N addition rate increased. The GNR positively correlated with the ammonia-oxidizing bacteria (AOB) abundance in topsoil (P < 0.05) and the gross mineralization rate in subsoil (P < 0.05). The results indicated that changes in the AOB abundance contributed to the bell-shaped pattern of GNR in the topsoil, and the decrease in mineralization rate contributed to the decrease in GNR with N enrichment by reducing substrate supply in the subsoil. The different responses of soil nitrification to N enrichment at different soil depths and the mechanisms involved should be taken into consideration in biogeochemical models to better predict the soil N cycling in the context of N enrichment. |
| WOS关键词 | NITROGEN ; RETENTION |
| WOS研究方向 | Agriculture |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000947955500001 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/190279]  |
| 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.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Synth Res Ctr Chinese Ecosyst Res Network, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Song, Lei,Zhang, Ruiyang,Li, Yang,et al. Different responses of the gross nitrification rate to N enrichment in topsoil and subsoil[J]. GEODERMA,2023,432. |
| APA | Song, Lei.,Zhang, Ruiyang.,Li, Yang.,Pan, Junxiao.,Wang, Jinsong.,...&Niu, Shuli.(2023).Different responses of the gross nitrification rate to N enrichment in topsoil and subsoil.GEODERMA,432. |
| MLA | Song, Lei,et al."Different responses of the gross nitrification rate to N enrichment in topsoil and subsoil".GEODERMA 432(2023). |
入库方式： OAI收割
来源：地理科学与资源研究所
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