Monitoring nitrogen deposition in typical forest ecosystems along a large transect in China |
| ------------------------------------------------------------------------------------------ |
|
出 版 社：Environ Monit Assess |
|
发表时间：2013 |
|
台 站：鼎湖山森林生态系统定位研究站 |
|
作 者：闫俊华（4）
|
|
点 击 率：591503 |
| ------------------------------------------------------------------------------------------ |
|
关 键 字(英文)：Dissolved inorganic nitrogen (DIN),Ionexchange resin(IER),Forest ecosystem,North–South Transect of Eastern China (NSTEC),ChinaFLUX |
| 摘 要(英文)：The nitrogen (N) deposition fluxes were investigated in eight typical forest ecosystems along the North–South Transect of Eastern China (NSTEC;based on the ChinaFLUX network) by ion-exchange resin (IER) columns from May 2008 to April 2009.Our results demonstrated that the method of IER columns was both labor cost saving and reliable for measuring dissolved inorganic nitrogen (DIN) deposition
at the remote forest stations. The deposition of DIN in the throughfall ranged from 1.3 to 29.5kgN ha−1 a−1, increasing from north to south along NSTEC. The relatively high average ratio of ammonium to nitrate in deposition (1.83) indicated that the N
deposition along the NSTEC in China mostly originated in farming and animal husbandry rather than in industry and vehicle activities. For seasonal variability, the DIN deposition showed a single peak in the growing season in the northern part of NSTEC,while, in the southern part, it exhibited double-peaks in the early spring and the mid-summer, respectively.On the annual scale, the DIN deposition variations of the eight sites could be mainly explained by precipitation and the distances from forest stations to provincial
capital cities. |
| ------------------------------------------------------------------------------------------ |
 闫俊华4-2013-Environ Monit Assess-Monitoring nitrogen deposition in typical forest ecosystems along a large transect in China.pdf |
