Soil acidification exerts a greater control on soil respiration than soil nitrogen availability in grasslands subjected to long-term nitrogen enrichment
文献类型：期刊论文
| 作者 | Chen, Dima1; Li, Jianjun; Lan, Zhichun; Hu, Shuijin1; Bai, Yongfei
|
| 刊名 | FUNCTIONAL ECOLOGY
 |
| 出版日期 | 2016 |
| 卷号 | 30期号:4页码:658-669 |
| 关键词 | base mineral cations below-ground carbon allocation microbial respiration plant functional group root nitrogen content root respiration root specific respiration soil microbial community |
| ISSN号 | 0269-8463 |
| DOI | 10.1111/1365-2435.12525 |
| 文献子类 | Article |
| 英文摘要 | Terrestrial ecosystems worldwide are receiving increasing amounts of biologically reactive nitrogen (N) as a consequence of anthropogenic activities. This intended or unintended fertilization can have a wide-range of impacts on biotic communities and hence on soil respiration. Reduction in below-ground carbon (C) allocation induced by high N availability has been assumed to be a major mechanism determining the effects of N enrichment on soil respiration. In addition to increasing available N, however, N enrichment causes soil acidification, which may also affect root and microbial activities. The relative importance of increased N availability vs. soil acidification on soil respiration in natural ecosystems experiencing N enrichment is unclear. We conducted a 12-year N enrichment experiment and a 4-year complementary acid addition experiment in a semi-arid Inner Mongolian grassland. We found that N enrichment had contrasting effects on root and microbial respiration. N enrichment significantly increased root biomass, root N content and specific root respiration, thereby promoting root respiration. In contrast, N enrichment significantly suppressed microbial respiration likely by reducing total microbial biomass and changing the microbial community composition. The effect on root activities was due to both soil acidity and increased available N, while the effect on microbes primarily stemmed from soil acidity, which was further confirmed by results from the acid addition experiment. Our results indicate that soil acidification exerts a greater control than soil N availability on soil respiration in grasslands experiencing long-term N enrichment. These findings suggest that N-induced soil acidification should be included in predicting terrestrial ecosystem C balance under future N deposition scenarios. |
| 学科主题 | Ecology |
| 出版地 | HOBOKEN |
| 电子版国际标准刊号 | 1365-2435 |
| WOS关键词 | ROOT RESPIRATION ; SUBTROPICAL PLANTATIONS ; MICROBIAL COMMUNITIES ; PLANT DIVERSITY ; CARBON STORAGE ; CO2 EFFLUX ; DEPOSITION ; ACID ; PRODUCTIVITY ; DECLINES |
| WOS研究方向 | Science Citation Index Expanded (SCI-EXPANDED) |
| 语种 | 英语 |
| WOS记录号 | WOS:000373920800017 |
| 出版者 | WILEY |
| 资助机构 | Chinese National Key Development Program for Basic Research [2015CB954201] ; Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31320103916, 31030013] ; Strategic Priority Research Program of the Chinese Academy of SciencesChinese Academy of Sciences [XDA05050400] |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/25192]  |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.N Carolina State Univ, Dept Plant Pathol, Box 7616, Raleigh, NC 27695 USA |
| 推荐引用方式 GB/T 7714 | Chen, Dima,Li, Jianjun,Lan, Zhichun,et al. Soil acidification exerts a greater control on soil respiration than soil nitrogen availability in grasslands subjected to long-term nitrogen enrichment[J]. FUNCTIONAL ECOLOGY,2016,30(4):658-669. |
| APA | Chen, Dima,Li, Jianjun,Lan, Zhichun,Hu, Shuijin,&Bai, Yongfei.(2016).Soil acidification exerts a greater control on soil respiration than soil nitrogen availability in grasslands subjected to long-term nitrogen enrichment.FUNCTIONAL ECOLOGY,30(4),658-669. |
| MLA | Chen, Dima,et al."Soil acidification exerts a greater control on soil respiration than soil nitrogen availability in grasslands subjected to long-term nitrogen enrichment".FUNCTIONAL ECOLOGY 30.4(2016):658-669. |
入库方式： OAI收割
来源：植物研究所
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