Experimental study on N2O and CH4 fluxes from the dark coniferous forest zone soil of the Gongga Mountain, China
文献类型：SCI/SSCI论文
| 作者 | Liang T. |
| 发表日期 | 2003 |
| 关键词 | Gongga Mountain mountain dark coniferous forest soil CH4 N2O flux temperate nitrogen methane consumption |
| 英文摘要 | The static closed chamber technique is used in the study on the CH4 and N2O fluxes from the soils of primeval Abies fabri forest, the succession Abies fabri forest and the clear-cut areas of mid-aged Abies fabri forest in the Gongga Mountain from May 1968 to September 1999. The results indicate the following: (i) The forest soil serves as the source of atmospheric N2O at the three measurement sites, while the fluxes of CH4 are all negative, and soil is the sink of atmospheric CH4. The comparative relations of N2O emissions between the three sites are expressed as primeval Abies fabri forest > clear-cut areas > succession Abies fabri forest, and those of CH4 consumption fluxes are primeval Abies fabriforest > succession Abies fabriforest > clear-cut areas. (ii) Significant seasonal variations of N2O emission at various sites were observed, and two emission peaks of N2O occurr, during summer (July-August) and spring (February-March), whereas N2O emission is. relatively low in winter and spring (mid March-April). Seasonal variations of CH4 consumption at each measurement site fluctuate drastically with unclear regularities. Generally, CH4 consumption fluxes of succession Abies fabri forest and clear-cut areas are higher from mid May to late July but lower in the rest of sampling time, while the CH4 flux keeps a relatively high value even up to September in primeval Abies fabri forest. In contrast to primeval Abies fabri forest, the CH4 absorbabilities of succession Abies fabri forest and clear-cut areas of mid-aged Abies fabri forest are weaker. Particularly, the absorbability of the clear-cut areas is even weaker as compared with the other two sites, for the deforestation reduces the soil absorbability of atmospheric CH4. (iii) Evident diurnal variation regularity exists in the N2O emissions of primeval Abies fabri forest, and there is a statistic positive correlation between the fluxes of N2O and air temperature (R=0.95, n=11, alpha < 0.01), and also the soil temperature of 5-cm layer (R=0.81, n=11, alpha < 0.01), whereas the CH4 diurnal variation regularities are unclear and have no significant correlation with the soil temperature of 5-cm layer and air temperature. |
| 出处 | Science in China Series D-Earth Sciences |
| 卷 | 46 |
| 期 | 3 |
| 页 | 285-295 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 1006-9313 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/24109]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Liang T.. Experimental study on N2O and CH4 fluxes from the dark coniferous forest zone soil of the Gongga Mountain, China. 2003. |
入库方式： OAI收割
来源：地理科学与资源研究所
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