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| Content Provider | Springer Nature Link |
|---|---|
| Author | Fang, Yunting Gundersen, Per Zhang, Wei Zhou, Guoyi Christiansen, Jesper Riis Mo, Jiangming Dong, Shaofeng Zhang, Tao |
| Copyright Year | 2008 |
| Abstract | At most sites the magnitude of soil-atmosphere exchange of nitrous dioxide (N$_{2}$O), carbon dioxide (CO$_{2}$) and methane (CH$_{4}$) was estimated based on a few chambers located in a limited area. Topography has been demonstrated to influence the production and consumption of these gases in temperate ecosystems, but this aspect has often been ignored in tropical areas. In this study, we investigated spatial variability of the net fluxes of these gases along a 100 m long slope of a evergreen broadleaved forest in southern China over a whole year. We expected that the lower part of slope would release more N$_{2}$O and CO$_{2}$, but take up less atmospheric CH$_{4}$ than the upper part due to different availability of water and nutrients. Our results showed that the soil moisture (Water Filled Pore Space, WFPS) decreased along the slope from bottom to top as we expected, but among the three gases only N$_{2}$O emissions followed this pattern. Annual means of WFPS ranged from 27.7% to 52.7% within the slope, and annual emissions of N$_{2}$O ranged from 2.0 to 4.4 kg N ha$^{−1}$ year$^{−1}$, respectively. These two variables were highly and positively correlated across the slope. Neither potential rates of net N mineralization and nitrification, nor N$_{2}$O emissions in the laboratory incubated soils varied with slope positions. Soil CO$_{2}$ release and CH$_{4}$ uptake appeared to be independent on slope position in this study. Our results suggested that soil water content and associated N$_{2}$O emissions are likely to be influenced by topography even in a short slope, which may need to be taken into account in field measurements and modelling. |
| Starting Page | 37 |
| Ending Page | 48 |
| Page Count | 12 |
| File Format | |
| ISSN | 0032079X |
| Journal | Plant and Soil |
| Volume Number | 319 |
| Issue Number | 1-2 |
| e-ISSN | 15735036 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2008-12-11 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Nitrous oxide Carbon dioxide Methane Soil water content Slope Subtropical forest Ecology Plant Physiology Soil Science & Conservation Plant Sciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | Soil Science Plant Science |
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