Effect of litter layer on soil-atmosphere N2O flux of a subtropical pine plantation in China
文献类型：EI期刊论文
| 作者 | Dai Xiaoqin; Wen Xuefa; Ma Zeqing; Wang Huimin |
| 发表日期 | 2014 |
| 关键词 | Tropics Climate change Drought Forestry Nitrogen oxides Soil moisture |
| 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 (FCK) and litter-free (FLF) treatments were 6.07 and 5.17gN2Om-2h-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 FCK and FLF were both significantly influenced by water-filled pore space (WFPS) but not by soil temperature (TS). However, FCK and FLF were both correlated with TS during the wet season (January-June) but not during the dry season (July-December). During the wet season, FCK and FLF were 84% and 132% higher than during the dry season, respectively. In contrast, seasonal litter-based N2O fluxes (FCK-LF=FCK-FLF) were not correlated with WFPS and TS. 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. 2013 Elsevier Ltd. |
| 出处 | Atmospheric Environment
 |
| 卷 | 82页:106-112 |
| 收录类别 | EI |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/31398]  |
| 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 | Dai Xiaoqin,Wen Xuefa,Ma Zeqing,et al. Effect of litter layer on soil-atmosphere N2O flux of a subtropical pine plantation in China. 2014. |
入库方式： OAI收割
来源：地理科学与资源研究所
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