Drying-rewetting cycles alter carbon and nitrogen mineralization in litter-amended alpine wetland soil
文献类型：SCI/SSCI论文
| 作者 | Gao J. Q.; Feng, J.; Zhang, X. W.; Yu, F. H.; Xu, X. L.; Kuzyakov, Y. |
| 发表日期 | 2016 |
| 关键词 | Alpine wetland C mineralization Drying-rewetting cycles Litter addition N mineralization Soil organic C field conditions wetting cycles forest soil meadow soil co2 efflux decomposition respiration temperature availability fumigation |
| 英文摘要 | Wetting-drying cycles can influence decomposition of litter and soil organic carbon (SOC) and their mineralization, but such effects have seldom been explored in alpine wetland soils. We conducted a 120-day incubation experiment with alpine wetland soils to which we added litter or not. These soil samples were assigned to two constant moisture treatments (60% or 100% soil water-holding capacity, WHC) or to a wetting-drying treatment that cycled between 60% and 100% WHC. Drying-rewetting cycles significantly accelerated carbon (C) mineralization and nitrogen (N) immobilization compared to soil under saturated soil moisture conditions. Litter addition greatly increased C mineralization and N immobilization, but the intensity of mineralization was regulated by soil moisture through microbial biomass. A significantly negative relationship between C and N mineralization became more pronounced when litter was added. Thus, drying-rewetting cycles can alter C and N mineralization, and this effect can strongly depend on litter in alpine wetlands. This indicates that future climate change could affect C stocks in alpine wetland soil through altering moisture and litter production. (C) 2016 Elsevier B.V. All rights reserved. |
| 出处 | Catena |
| 卷 | 145 |
| 页 | 285-290 |
| 语种 | 英语 |
| ISSN号 | 0341-8162 |
| DOI标识 | 10.1016/j.catena.2016.06.026 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/42946]  |
| 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 | Gao J. Q.,Feng, J.,Zhang, X. W.,et al. Drying-rewetting cycles alter carbon and nitrogen mineralization in litter-amended alpine wetland soil. 2016. |
入库方式： OAI收割
来源：地理科学与资源研究所
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