The stimulatory effect of elevated CO2 on soil respiration is unaffected by N addition
文献类型：期刊论文
| 作者 | Chen, Yao5,6; Zhang, Yangjian2,5,7; Bai, Edith1; Piao, Shilong3; Chen, Ning4; Zhao, Guang5; Zheng, Zhoutao5; Zhu, Yixuan5,6 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2022-03-20 |
| 卷号 | 813页码:11 |
| 关键词 | ElevatedCO(2) Nitrogen availability Soil respiration microbial carbon use efficiency Enzyme activity Carbon cycling |
| ISSN号 | 0048-9697 |
| DOI | 10.1016/j.scitotenv.2021.151907 |
| 通讯作者 | Zhang, Yangjian(zhanyj@igsnrr.ac.cn) |
| 英文摘要 | Global atmospheric CO2 keeps rising and brings about significant effects on ecosystem carbon (C) cycling by altering C processes in soils. Soil C responses to elevated CO2 are highly uncertain, and how elevated CO2 interacts with other factors, such as nitrogen (N) availability, to influence soil C flux comprises an important source of this uncertainty, especially for those under-studied ecosystems. By conducting a manipulated CO2 concentration and N availability experiment on typical alpine grassland (4600 m asl), we combined the five-year in-situ measurement of soil respiration (SR) with an incubation experiment of microbial metabolic efficiency in the lab to explore the response of SR to elevated CO2 and N availability. The results showed that elevated CO2 at ambient N conditions and enriched N equally stimulated SR during the experimental period, whereas N supply had no significant effect. Elevated CO2 enhanced soil dissolved organic C and enzyme activity, while had marginal effects on microbial biomass and C use efficiency (CUE). Strengthened microbial activity dominated SR stimulation under elevated CO2. Enriched N boosted enzyme activity and microbial CUE. N availability played divergent roles in mediating SR. The negliable regulation of N supply on elevated CO2 effects on SR was the offset consequences of the negative impacts of enhanced CUE and the positive contribution of heightened enzyme activity. Our findings suggest that rising CO2 would accelerate soil C cycling of the alpine grassland under various N regimes by stimulating microbial activity instead of lowering microbial metabolic efficiency. Such results are crucial for understanding the role of alpine ecosystems in the global C cycle. |
| WOS关键词 | CARBON-USE EFFICIENCY ; MICROBIAL BIOMASS CALIBRATION ; FUMIGATION-EXTRACTION METHOD ; ATMOSPHERIC CO2 ; NITROGEN LIMITATION ; RESOURCE STOICHIOMETRY ; INORGANIC NITROGEN ; TIBETAN PLATEAU ; ORGANIC-CARBON ; PINE FOREST |
| 资助项目 | National Key Research and Development Program[2019YFA0607302] ; National Natural Science Foundation of China[32061143037] ; Outstanding Youth Scientist Program of NSFC[41725003] ; strategic priority research program of the Chinese Academy of Sciences[XDA19070303] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000767233400010 |
| 出版者 | ELSEVIER |
| 资助机构 | National Key Research and Development Program ; National Natural Science Foundation of China ; Outstanding Youth Scientist Program of NSFC ; strategic priority research program of the Chinese Academy of Sciences |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/172421]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Zhang, Yangjian |
| 作者单位 | 1.Northeast Normal Univ, Sch Geog Sci, Key Lab Geog Proc & Ecol Secur Changbai Mt, Minist Educ, Changchun, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China 3.Peking Univ, Coll Urban & Environm Sci, Sino French Inst Earth Syst Sci, Beijing, Peoples R China 4.Chinese Acad Sci, Northeast Inst Geog & Agroecol, Key Lab Wetland Ecol & Environm, Changchun, Peoples R China 5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing, Peoples R China 6.Univ Chinese Acad Sci, Beijing, Peoples R China 7.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Yao,Zhang, Yangjian,Bai, Edith,et al. The stimulatory effect of elevated CO2 on soil respiration is unaffected by N addition[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2022,813:11. |
| APA | Chen, Yao.,Zhang, Yangjian.,Bai, Edith.,Piao, Shilong.,Chen, Ning.,...&Zhu, Yixuan.(2022).The stimulatory effect of elevated CO2 on soil respiration is unaffected by N addition.SCIENCE OF THE TOTAL ENVIRONMENT,813,11. |
| MLA | Chen, Yao,et al."The stimulatory effect of elevated CO2 on soil respiration is unaffected by N addition".SCIENCE OF THE TOTAL ENVIRONMENT 813(2022):11. |
入库方式： OAI收割
来源：地理科学与资源研究所
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