Effects of Afforestation on Soil Carbon and Nitrogen Accumulation Depend on Initial Soil Nitrogen Status
文献类型：期刊论文
| 作者 | Hong, Songbai; Cong, Nan; Ding, Jinzhi; Piao, Shilong; Liu, Lingli; Penuelas, Josep; Chen, Anping; Quine, Timothy A.; Zeng, Hui; Houlton, Benjamin Z. |
| 刊名 | GLOBAL BIOGEOCHEMICAL CYCLES
 |
| 出版日期 | 2023 |
| 卷号 | 37期号:1页码:e2022GB007490 |
| ISSN号 | 1944-9224 |
| 关键词 | afforestation soil organic carbon (SOC) soil total nitrogen (STN) soil carbon nitrogen ratio (soil C:~N) mycorrhiza |
| DOI | 10.1029/2022GB007490 |
| 产权排序 | 2 |
| 文献子类 | Article |
| 英文摘要 | Long-term carbon (C) sequestration in terrestrial vegetation and soil is mediated by soil nitrogen (N) supply. Afforestation is regarded as a global-scale solution to climate change; thus, resolving the role of N in either facilitating or reducing the long-term C benefits of this practice has essential implications to maximize its C sink potential. The impacts of afforestation on soil C, N, and their stoichiometric ratio have been widely explored but what regulates these impacts remains unclear at regional and global scales. In this study, we conducted an intensive field sampling investigation including 610 pairs of afforested and control plots in northern China and extensively compiled a global data set containing 211 afforested-control pairs worldwide to evaluate responses of soil N concentrations and C:N ratios to afforestation and further explored their major regulator. We identified a soil N threshold, the inflection point where afforestation changes from increasing to decreasing soil C and N, which was 0.86 (95% CI: 0.81-0.91) kg N m(-2) in 0-1 m depth. Changes in soil C:N ratios with afforestation were mediated by initial relative abundance of soil C and N and types of mycorrhiza associated with planted trees. Increases in soil C:N were mostly driven by trees with ectomycorrhizal associations but did not change for those associated with arbuscular mycorrhizal fungi. These results provide a data-based understanding on soil C and N dynamics following afforestation and its underlying mechanisms and further highlight the importance of site selection based on initial soil properties in future afforestation. Plain Language Summary The C sequestration potential of afforestation is largely regulated by soil N supply. However, how initial soil N status regulates soil C and N dynamics after afforestation remains poorly understood. In this study, we conducted a systematic field campaign from representative afforested areas in northern China and compiled a meta-data set at the global scale from 86 peer-reviewed papers to fill this knowledge gap. We found that afforestation increased soil C and N storages in N-poor soils but decreased them in N-rich soils. Changes in soil C:N ratios with afforestation were mediated by the initial relative abundance of soil C and N. Moreover, increases in soil C:N were mostly driven by trees with ectomycorrhizal associations but did not change for those associated with arbuscular mycorrhizal fungi. These findings provide a benchmark for evaluating the ecological benefits and costs of afforestation and also have implications for future afforestation site selection. |
| 学科主题 | Environmental Sciences & Ecology ; Geology ; Meteorology & Atmospheric Sciences |
| WOS关键词 | ORGANIC-CARBON ; CHINA ; SEQUESTRATION ; MINERALIZATION ; FIXATION ; GROWTH |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology ; Meteorology & Atmospheric Sciences |
| 出版者 | AMER GEOPHYSICAL UNION |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/193886]  |
| 专题 | 拉萨站高原生态系统研究中心_外文论文 |
| 作者单位 | 1.Institute of Botany, CAS 2.Chinese Academy of Sciences 3.Institute of Geographic Sciences & Natural Resources Research, CAS 4.Institute of Tibetan Plateau Research, CAS 5.Colorado State University 6.Consejo Superior de Investigaciones Cientificas (CSIC) 7.University of Exeter 8.Cornell University 9.Autonomous University of Barcelona 10.University of Barcelona |
| 推荐引用方式 GB/T 7714 | Hong, Songbai,Cong, Nan,Ding, Jinzhi,et al. Effects of Afforestation on Soil Carbon and Nitrogen Accumulation Depend on Initial Soil Nitrogen Status[J]. GLOBAL BIOGEOCHEMICAL CYCLES,2023,37(1):e2022GB007490. |
| APA | Hong, Songbai.,Cong, Nan.,Ding, Jinzhi.,Piao, Shilong.,Liu, Lingli.,...&Houlton, Benjamin Z..(2023).Effects of Afforestation on Soil Carbon and Nitrogen Accumulation Depend on Initial Soil Nitrogen Status.GLOBAL BIOGEOCHEMICAL CYCLES,37(1),e2022GB007490. |
| MLA | Hong, Songbai,et al."Effects of Afforestation on Soil Carbon and Nitrogen Accumulation Depend on Initial Soil Nitrogen Status".GLOBAL BIOGEOCHEMICAL CYCLES 37.1(2023):e2022GB007490. |
入库方式： OAI收割
来源：地理科学与资源研究所
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