Nitrogen availability regulates deep soil priming effect by changing microbial metabolic efficiency in a subtropical forest
文献类型：期刊论文
| 作者 | Liao, Chang1,2; Tian, Qiuxiang1; Liu, Feng1 |
| 刊名 | JOURNAL OF FORESTRY RESEARCH
 |
| 出版日期 | 2020-05-19 |
| 页码 | 11 |
| 关键词 | Deep soil Priming effect Community-level physiological profiling Soil enzyme activity Microbial metabolic efficiency |
| ISSN号 | 1007-662X |
| DOI | 10.1007/s11676-020-01148-0 |
| 英文摘要 | In terrestrial ecosystems, deep soils (below 30 cm) are major organic carbon (C) pools. The labile carbon input could alter soil organic carbon (SOC) mineralization, resulting in priming effect (PE), which could be modified by nitrogen (N) availability, however, the underlying mechanism is unclear for deep soils, which complicates the prediction of deep soil C cycling in response to N deposition. A series of N applications with C-13 labeled glucose was set to investigate the effect of labile C and N on deep SOC mineralization. Microbial biomass, functional community, metabolic efficiency and enzyme activities were examined for their effects on SOC mineralization and PE. During incubation, glucose addition promoted SOC mineralization, resulting in positive PE. The magnitude of PE decreased significantly with increasing N. The N-regulated PE was not dependent on extracellular enzyme activities but was positively correlated with carbon use efficiency and negatively with metabolic quotient. Higher N levels resulted in higher microbial biomass and SOC-derived microbial biomass than lower N levels. These results suggest that the decline in the PE under high N availability was mainly controlled by higher microbial metabolic efficiency which allocated more C for growth. Structural equation modelling also revealed that microbial metabolic efficiency rather than enzyme activities was the main factor regulating the PE. The negative effect of additional N suggests that future N deposition could promote soil C sequestration. |
| 资助项目 | Natural Science Foundation of China[31870465] ; Natural Science Foundation of China[31600377] ; Natural Science Foundation of China[31700462] |
| WOS研究方向 | Forestry |
| 语种 | 英语 |
| WOS记录号 | WOS:000534508700001 |
| 出版者 | NORTHEAST FORESTRY UNIV |
| 源URL | [http://202.127.146.157/handle/2RYDP1HH/15323]  |
| 专题 | 中国科学院武汉植物园 |
| 通讯作者 | Liu, Feng |
| 作者单位 | 1.Chinese Acad Sci, CAS Key Lab Aquat Bot & Watershed Ecol, Wuhan Bot Garden, Wuhan 430074, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liao, Chang,Tian, Qiuxiang,Liu, Feng. Nitrogen availability regulates deep soil priming effect by changing microbial metabolic efficiency in a subtropical forest[J]. JOURNAL OF FORESTRY RESEARCH,2020:11. |
| APA | Liao, Chang,Tian, Qiuxiang,&Liu, Feng.(2020).Nitrogen availability regulates deep soil priming effect by changing microbial metabolic efficiency in a subtropical forest.JOURNAL OF FORESTRY RESEARCH,11. |
| MLA | Liao, Chang,et al."Nitrogen availability regulates deep soil priming effect by changing microbial metabolic efficiency in a subtropical forest".JOURNAL OF FORESTRY RESEARCH (2020):11. |
入库方式： OAI收割
来源：武汉植物园
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