Rhizospheric carbon-nitrogen interactions in a mixed-species pasture after 13 years of elevated CO2
文献类型：期刊论文
| 作者 | Deng, Qi1; Cheng, Xiaoli1; Bowatte, Saman2; Newton, Paul C. D.3; Zhang, Quanfa1 |
| 刊名 | AGRICULTURE ECOSYSTEMS & ENVIRONMENT
 |
| 出版日期 | 2016-11-01 |
| 卷号 | 235页码:134-141 |
| 关键词 | Carbon-nitrogen interaction FACE Grassland Plant-soil interaction Rhizosphere |
| ISSN号 | 0167-8809 |
| DOI | 10.1016/j.agee.2016.10.016 |
| 英文摘要 | Responses of rhizospheric processes to elevated CO2 vary across mono-species studies, yet our understanding of the responses of multiple co-occurring species is still limited. We conducted a field study using the New Zealand free-air CO2 enrichment (FACE) experiment to evaluate rhizospheric carbon (C) and nitrogen (N) dynamics in a low-fertility species (Agrostis capillaris) and a high-fertility species (Lolium perenne) under 13 years of elevated CO2 and at ambient levels. Despite contrasting responses of plant growth, elevated CO2 significantly increased the total C and N (TC and TN, respectively), net N mineralization and nitrification rates (NMR and NR, respectively) as well as the delta N-15 value of soil organic N in the rhizospheres across species. However, the rhizospheric microbial biomass C (MBC) was significantly enhanced for L. perenne but reduced for A. capillaris under elevated CO2, and was positively corrected with plant biomass. Elevated CO2 did not affect rhizospheric NO3--N concentrations for either species, while it significantly increased the rhizospheric NH4+-N concentration for A.. capillaris. Together, the increased TC as well as the decreased MBC suggest rhizosphere in A. capillaris may be more favorable to long term C sequestration under elevated CO2. The increased NH4+-N concentration may stimulate the growth of A. capillaris under elevated CO2 in the near future, which will have significant implication for the change in species composition. The findings in this study are useful for parameterizing terrestrial biogeochemical models with mixed-species ecosystems, which can be used to analyze the effects of possible future climate change. (C) 2016 Elsevier B.V. All rights reserved. |
| 资助项目 | Chinese Academy of Sciences[XDB15010200] ; Chinese Academy of Sciences[XDA05060500] ; National Natural Science Foundation of China[31470557] ; National Natural Science Foundation of China[31270550] ; National Natural Science Foundation of China[31130010] |
| WOS研究方向 | Agriculture ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000389296700014 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://202.127.146.157/handle/2RYDP1HH/3592]  |
| 专题 | 中国科学院武汉植物园 |
| 通讯作者 | Cheng, Xiaoli |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Aquat Bot & Watershed Ecol, Wuhan Bot Garden, Wuhan 430074, Peoples R China 2.Lanzhou Univ, Coll Pastoral Agr Sci & Technol, State Key Lab Grassland Agro Ecosystems, Lanzhou 730020, Gansu, Peoples R China 3.Land & Environm Management Grp, AgRes Grasslands, Palmerston North, New Zealand |
| 推荐引用方式 GB/T 7714 | Deng, Qi,Cheng, Xiaoli,Bowatte, Saman,et al. Rhizospheric carbon-nitrogen interactions in a mixed-species pasture after 13 years of elevated CO2[J]. AGRICULTURE ECOSYSTEMS & ENVIRONMENT,2016,235:134-141. |
| APA | Deng, Qi,Cheng, Xiaoli,Bowatte, Saman,Newton, Paul C. D.,&Zhang, Quanfa.(2016).Rhizospheric carbon-nitrogen interactions in a mixed-species pasture after 13 years of elevated CO2.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,235,134-141. |
| MLA | Deng, Qi,et al."Rhizospheric carbon-nitrogen interactions in a mixed-species pasture after 13 years of elevated CO2".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 235(2016):134-141. |
入库方式： OAI收割
来源：武汉植物园
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