Effects of long-term increased N deposition on tropical montane forest soil N2 and N2O emissions
文献类型：期刊论文
| 作者 | Tang, Wenguang; Chen, Dexiang; Phillips, Oliver L.; Liu, Xian; Zhou, Zhang; Li, Yide; Xi, Dan; Zhu, Feifei; Fang, Jingyun; Zhang, Limei |
| 刊名 | SOIL BIOLOGY & BIOCHEMISTRY
 |
| 出版日期 | 2018-11-01 |
| 卷号 | 126页码:194-203 |
| ISSN号 | 0038-0717 |
| 关键词 | Nitrogen deposition Tropical montane forests Nitrous oxide emission Dinitrogen emission Denitrification Denitrification genes |
| 文献子类 | Article |
| 英文摘要 | Nitrogen (N) deposition is projected to substantially increase in the tropics over the coming decades, which is expected to lead to enhanced N saturation and gaseous N emissions from tropical forests (via NO, N2O, and N-2). However, it is unclear how N deposition in tropical forests influences both the magnitude of gaseous loss of nitrogen and its partitioning into the N-2 and N2O loss mechanisms. Here, for the first time, we employed the acetylene inhibition technique and the N-15-nitrate labeling method to quantify N-2 and N2O emission rates for long-term experimentally N-enriched treatments in primary and secondary tropical montane forest. We found that during laboratory incubation under aerobic conditions long-term increased N addition of up to 100 kg N ha(-1) yr(-1) at Jianfengling forest, China, did not cause a significant increase in either N2O or N-2 emissions, or N2O/N-2. However, under anaerobic conditions, N2O emissions decreased and N-2 emissions increased with increasing N addition in the secondary forest. These changes may be attributed to substantially greater N2O reduction to N-2 during denitrification, further supported by the decreased N2O/N-2 ratio with increasing N addition. No such effects were observed in the primary forest. In both forests, N addition decreased the contribution of denitrification while increasing the contribution of co-denitrification and heterotrophic nitrification to N2O production. Denitrification was the predominant pathway to N-2 production (98-100%) and its contribution was unaffected by N addition. Despite the changes in the contributions of denitrification to N2O gas emissions, we detected no change in the abundance of genes associated with denitrification. While the mechanisms for these different responses are not yet clear, our results indicate that the effects of N deposition on gaseous N loss were ecosystem-specific in tropical forests and that the microbial processes responsible for the production of N gases are sensitive to N inputs. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/40735]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Tang, Wenguang,Chen, Dexiang,Phillips, Oliver L.,et al. Effects of long-term increased N deposition on tropical montane forest soil N2 and N2O emissions[J]. SOIL BIOLOGY & BIOCHEMISTRY,2018,126:194-203. |
| APA | Tang, Wenguang.,Chen, Dexiang.,Phillips, Oliver L..,Liu, Xian.,Zhou, Zhang.,...&Fang, Yunting.(2018).Effects of long-term increased N deposition on tropical montane forest soil N2 and N2O emissions.SOIL BIOLOGY & BIOCHEMISTRY,126,194-203. |
| MLA | Tang, Wenguang,et al."Effects of long-term increased N deposition on tropical montane forest soil N2 and N2O emissions".SOIL BIOLOGY & BIOCHEMISTRY 126(2018):194-203. |
入库方式： OAI收割
来源：生态环境研究中心
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。