| Effect of litter layer on soil-atmosphere N2O flux of a subtropical pine plantation in China | |
| Wang Y. D. ; Wang H. M. ; Wang Z. L. ; Ma Z. Q. ; Dai X. Q. ; Wen X. F. ; Liu Y. F. | |
| 2014 | |
| 关键词 | Litter removal Nitrous oxide Organic horizon Slash pine Soil-atmosphere N2O exchange Subtropical forest land-use types nitrous-oxide tropical forest coniferous plantation southern china southwest china carbon-dioxide co2 emissions nitric-oxide rain-forest |
| 英文摘要 | Forest soils are important sources for nitrous oxide (N2O), but how the surface litter layer affects these sources is still unclear. Seasonal rainfall in the subtropical monsoon climate provides a unique opportunity to examine soil-atmosphere N2O flux under a wide range of soil water content. We studied this question over 3 years using a litter removal method in a 20-year-old pine plantation (Pinus elliottii) in subtropical China. Annual mean chamber-based soil-atmosphere N2O fluxes of the control (F-cK) and litter-free (F-LF) treatments were 6.07 and 5.17 mu g N2O m(-2) h(-1), respectively. Removal of the litter layer reduced 15% of soil N2O emissions, suggesting the mineral soil as the dominant factor that determines soil N2O emissions. Seasonal F-CK and F-LF were both significantly influenced by water-filled pore space (WFPS) but not by soil temperature (T-s). However, F-cK and F-LF were both correlated with T-s during the wet season (January-June) but not during the dry season (July-December). During the wet season. F-CK and FLF were 84% and 132% higher than during the dry season, respectively. In contrast, seasonal litterbased N2O fluxes (FCK-LF = FCK-FLF) were not correlated with WFPS and T-s. During the dry season, however, a positive relationship was observed for FCK-LF and WFPS. In the context of climate change and human activities, future changes in soil environment and surface litter management will alter the strength of soil N2O emissions of the subtropical pine forests in China. (C) 2013 Elsevier Ltd. All rights reserved. |
| 出处 | Atmospheric Environment |
| 卷 | 82 |
| 页 | 106-112 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 1352-2310 |
| 内容类型 | SCI/SSCI论文 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/29529]  |
| 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 | Wang Y. D.,Wang H. M.,Wang Z. L.,et al. Effect of litter layer on soil-atmosphere N2O flux of a subtropical pine plantation in China. 2014. |
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