Carbon limitation overrides acidification in mediating soil microbial activity to nitrogen enrichment in a temperate grassland
文献类型：期刊论文
| 作者 | Ning, Qiushi7; Hattenschwiler, Stephan8; Lu, Xiaotao2; Kardol, Paul3; Zhang, Yunhai; Wei, Cunzheng; Xu, Chengyuan4; Huang, Jianhui; Li, Ang; Yang, Junjie |
| 刊名 | GLOBAL CHANGE BIOLOGY
 |
| 出版日期 | 2021 |
| 卷号 | 27期号:22页码:5976-5988 |
| ISSN号 | 1354-1013 |
| 关键词 | belowground carbon allocation carbon use efficiency microbial carbon starvation nitrogen deposition organic matter decomposition soil acidification |
| DOI | 10.1111/gcb.15819 |
| 文献子类 | Article |
| 英文摘要 | Higher ecosystem nitrogen (N) inputs resulting from human activities often suppress soil microbial biomass and respiration, thereby altering biogeochemical cycling. Soil acidification and carbon (C) limitation may drive these microbial responses, yet their relative importance remains elusive, which limits our understanding of the longer term effects of increasing N inputs. In a field experiment with continuous N addition at seven different rates from 0 to 50 g N m(-2) year(-1) over 6 years in a temperate grassland of Inner Mongolia, China, we examined the responses of soil microbial biomass and respiration to changes in soil acidity and C availability by adding lime and/or glucose to soil samples. Soil microbial biomass and respiration did only weakly respond to increasing soil pH, but increased strongly in response to higher C availability with increasing N addition rates. Soil net N immobilization increased in response to glucose addition, and soil microbial biomass increased at higher rates than microbial respiration along the gradient of previous N addition rates, both suggesting increasingly reinforced microbial C limitation with increasing N addition. Our results provide clear evidence for strong N-induced microbial C limitation, but only little support for soil acidity effects within the initial pH range of 4.73-7.86 covered by our study. Field data support this conclusion by showing reduced plant C allocation belowground in response to N addition, resulting in soil microbial C starvation over the long term. In conclusion, soil microbial biomass and respiration under N addition were strongly dependent on C availability, most likely originating from plant belowground C inputs, and was much less affected by changes in soil pH. Our data help clarify a long-standing debate about how increasing N input rates affect soil microbial biomass and respiration, and improve the mechanistic understanding of the linkages between ecosystem N enrichment and C cycling. |
| 学科主题 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
| 电子版国际标准刊号 | 1365-2486 |
| 出版地 | HOBOKEN |
| WOS关键词 | LONG-TERM NITROGEN ; ORGANIC-MATTER ; TERRESTRIAL ECOSYSTEMS ; AGRICULTURAL SOILS ; BACTERIAL-GROWTH ; BIOMASS ; DEPOSITION ; FOREST ; ROOTS ; AVAILABILITY |
| WOS研究方向 | Science Citation Index Expanded (SCI-EXPANDED) |
| 语种 | 英语 |
| 出版者 | WILEY |
| WOS记录号 | WOS:000685695900001 |
| 资助机构 | National Key RD Program [2016YFC0500700] ; Open Foundation of the State Key Laboratory of Urban and Regional Ecology of China [SKLURE2021-2-1] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences [2018032] ; Catalan Government [SGR2017-1005] ; Fundacion Ramon Areces ; European Research Council [ERCSyG-2013-610028 IMBALANCE-P] |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/26478]  |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Fujian Normal Univ, Key Lab Humid Subtrop Ecogeog Proc, Minist Educ, Fuzhou, Peoples R China 2.Univ Montpellier, CNRS, EPHE, CEFE,IRD, Montpellier, France 3.Chinese Acad Sci, Inst Appl Ecol, Erguna Forest Steppe Ecotone Res Stn, Shenyang, Peoples R China 4.Swedish Univ Agr Sci, Dept Forest Ecol & Management, Umea, Sweden 5.Cent Queensland Univ, Sch Hlth Med & Appl Sci, Bundaberg, Qld, Australia 6.CREAF, Cerdanyola Del Valles, Catalonia, Spain 7.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 8.Griffith Univ, Sch Environm & Sci, Nathan, Qld, Australia 9.Univ Chinese Acad Sci, Coll Adv Agr Sci, Beijing, Peoples R China 10.Northeast Normal Univ, Key Lab Vegetat Ecol, Changchun 130024, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ning, Qiushi,Hattenschwiler, Stephan,Lu, Xiaotao,et al. Carbon limitation overrides acidification in mediating soil microbial activity to nitrogen enrichment in a temperate grassland[J]. GLOBAL CHANGE BIOLOGY,2021,27(22):5976-5988. |
| APA | Ning, Qiushi.,Hattenschwiler, Stephan.,Lu, Xiaotao.,Kardol, Paul.,Zhang, Yunhai.,...&Han, Xingguo.(2021).Carbon limitation overrides acidification in mediating soil microbial activity to nitrogen enrichment in a temperate grassland.GLOBAL CHANGE BIOLOGY,27(22),5976-5988. |
| MLA | Ning, Qiushi,et al."Carbon limitation overrides acidification in mediating soil microbial activity to nitrogen enrichment in a temperate grassland".GLOBAL CHANGE BIOLOGY 27.22(2021):5976-5988. |
入库方式： OAI收割
来源：植物研究所
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