Precipitation Pulses and Soil CO(2) Emission in Desert Shrubland of Artemisia ordosica on the Ordos Plateau of Inner Mongolia, China
文献类型：SCI/SSCI论文
| 作者 | Jin Z. ; Dong Y. S. ; Qi Y. C. ; Domroes M. |
| 发表日期 | 2009 |
| 关键词 | desert shrub ecosystem Mu Us sand land soil respiration response water addition semiarid ecosystems subtropical savanna microbial biomass carbon responses respiration exchange fluxes rain |
| 英文摘要 | Precipitation is the major driver of ecosystem functions and processes in semiarid and arid regions. In such water-limited ecosystems, pulsed water inputs directly control the below ground processes through a series of soil drying and rewetting cycles. To investigate the effects of sporadic addition of water on soil CO(2) efflux, an artificial precipitation event (3 mm) was applied to a desert shrub ecosystem in the Mu Us Sand Land of the Ordos Plateau in China. Soil respiration rate increased 2.8-4.1 times immediately after adding water in the field, and then it returned to background level within 48 h. During the experiment, soil CO(2) production was between 2047.0 and 7383.0 mg m(-2). In the shrubland, soil respiration responses showed spatial variations, having stronger pulse effects beneath the shrubs than in the interplant spaces. The spatial variation of the soil respiration responses was closely related with the heterogeneity of soil substrate availability. Apart from precipitation, soil organic carbon and total nitrogen pool were also identified as determinants of soil CO(2) loss in desert ecosystems. |
| 出处 | Pedosphere |
| 卷 | 19 |
| 期 | 6 |
| 页 | 799-807 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 1002-0160 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/23729]  |
| 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 | Jin Z.,Dong Y. S.,Qi Y. C.,et al. Precipitation Pulses and Soil CO(2) Emission in Desert Shrubland of Artemisia ordosica on the Ordos Plateau of Inner Mongolia, China. 2009. |
入库方式： OAI收割
来源：地理科学与资源研究所
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