Lasting effect of soil warming on organic matter decomposition depends on tillage practices
文献类型：SCI/SSCI论文
| 作者 | Hou R. X.; Ouyang, Z.; Maxim, D.; Wilson, G.; Kuzyakov, Y. |
| 发表日期 | 2016 |
| 关键词 | Thermal adaptation Warming Extracellular enzyme activity No-till Soil organic matter Q(10) temperature sensitivity microbial communities carbon decomposition enzyme-activity climate-change forest soils no-till respiration responses feedbacks |
| 英文摘要 | Global warming accelerates soil organic matter (SOM) decomposition with strong feedback to atmospheric CO2. Such an effect should be especially important for no-till agricultural practices, where SOM accumulates in the topsoil as compared with conventional tillage. We incubated soil samples (0-5 cm) at three temperature levels (15, 21 and 27 degrees C) from long-term till and no-till systems that were in situ warmed and non-warmed to assess the temperature sensitivity of CO2 efflux, labile organic carbon and extracellular enzyme activities. Thermal adaptation to prolonged warming was observed resulting in a lasting effect on SOM decomposition. On average, 26, 14 and 12% more CO2 was emitted at each incubation temperature from the warmed soils compared to the non-warmed soils. The Q(10) value was lower for the warmed than the non-warmed soils. Soil microbial biomass C and dissolved organic C declined with warming. The activities of three extracellular enzymes, beta-glucosidase, chitinase, and sulfatase, were higher under warming and no-till as compared to non-warmed and tilled soil. We concluded that the increased SOM decomposition due to the stimulation of microorganisms by warming was long-lasting. Predictions of C accumulation in the topsoil by no-till farming should be taken with caution, as this C pool is especially vulnerable to global warming. (C) 2016 Elsevier Ltd. All rights reserved. |
| 出处 | Soil Biology & Biochemistry |
| 卷 | 95 |
| 页 | 243-249 |
| 语种 | 英语 |
| ISSN号 | 0038-0717 |
| DOI标识 | 10.1016/j.soilbio.2015.12.008 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/42981]  |
| 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 | Hou R. X.,Ouyang, Z.,Maxim, D.,et al. Lasting effect of soil warming on organic matter decomposition depends on tillage practices. 2016. |
入库方式： OAI收割
来源：地理科学与资源研究所
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