Grazing exclusion enhances plant and topsoil carbon stocks in arid and semiarid grasslands
文献类型：期刊论文
| 作者 | Yu, Lingfei; Sun, Wenjuan; Huang, Yao
|
| 刊名 | AGRICULTURE ECOSYSTEMS & ENVIRONMENT
 |
| 出版日期 | 2021 |
| 卷号 | 320 |
| 关键词 | Grazing removal Plant carbon Restoration Soil carbon Soil moisture Temperate grassland |
| ISSN号 | 0167-8809 |
| DOI | 10.1016/j.agee.2021.107605 |
| 文献子类 | Article |
| 英文摘要 | Grazing exclusion (GE) is widely considered to be an important strategy for restoring overgrazed grasslands and promoting carbon (C) storage. However, the changes in the components of ecosystem C with GE and their related drivers remain largely unexplored. Here, we investigated the effects of GE on the ecosystem C components (plant and soil C stocks) and their key driving factors through sampling inside and outside 15 grazing exclosures across the Inner Mongolia arid and semiarid grasslands in northern China. Our results showed that, except for dead root C, GE significantly promoted plant C stocks. The increase of C stocks in AGB and litter resulted from the increases of both biomass and C concentration, while the increase in live root C stock was mainly attributed to biomass accumulation. GE also promoted the topsoil (0-10 cm) C stocks but had little effect on the subsoil (10-30 cm) C stocks. Overall, GE had no significant effect on total ecosystem C stocks. Our results further indicated that across the grasslands, GE likely enhanced C accumulation in AGB, litter and live root in more humid and/or fertile sites. We also found that the increases of C stocks in AGB and litter were driven by the direct effects of GE and its indirect effects mediated by soil water content. The increases of C stocks in live root and topsoil with GE were linked to only high soil water contents. The generalizability of the soil water effect was confirmed by a metaanalysis which further revealed that across the grasslands of China, the responses of ecosystem C components to GE were associated with changes in soil water conditions. Therefore, our study highlighted the important role of soil water in regulating ecosystem C dynamics with GE at the national scale. Overall, our results showed that across arid and semiarid grasslands, GE is generally beneficial for plant and topsoil C accumulation. However, GE effects mediated by soil water on ecosystem C components may change to some extent due to altered soil water conditions under climate change. |
| 学科主题 | Agriculture, Multidisciplinary ; Ecology ; Environmental Sciences |
| 出版地 | AMSTERDAM |
| 电子版国际标准刊号 | 1873-2305 |
| WOS关键词 | NORTHERN CHINA GRASSLANDS ; SOIL ORGANIC-CARBON ; INNER-MONGOLIA ; COMMUNITY COMPOSITION ; MICROBIAL BIOMASS ; LAND-USE ; NITROGEN ; STORAGE ; MANAGEMENT ; STEPPE |
| WOS研究方向 | Science Citation Index Expanded (SCI-EXPANDED) |
| 语种 | 英语 |
| WOS记录号 | WOS:000691679400003 |
| 出版者 | ELSEVIER |
| 资助机构 | Strategic Priority Research Program of the Chinese Academy of Sciences [XDA27010103-2] ; National Natural Science Foundation of China [31670484] |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/26632]  |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, 20 Nanxincun, Beijing 100093, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, Lingfei,Sun, Wenjuan,Huang, Yao. Grazing exclusion enhances plant and topsoil carbon stocks in arid and semiarid grasslands[J]. AGRICULTURE ECOSYSTEMS & ENVIRONMENT,2021,320. |
| APA | Yu, Lingfei,Sun, Wenjuan,&Huang, Yao.(2021).Grazing exclusion enhances plant and topsoil carbon stocks in arid and semiarid grasslands.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,320. |
| MLA | Yu, Lingfei,et al."Grazing exclusion enhances plant and topsoil carbon stocks in arid and semiarid grasslands".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 320(2021). |
入库方式： OAI收割
来源：植物研究所
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