Grazing intensity modifies alpine grassland fine root traits on the Qinghai-Tibetan Plateau
文献类型：期刊论文
| 作者 | Xiang, Mingxue3,4; Luo, Ruikang2; Wu, Junxi2,4; Niu, Ben4; Pan, Ying4; Zhang, Xianzhou1,4; Duo, Lha2; Ma, Tao3; Han, Chenglong3 |
| 刊名 | PLANT ECOLOGY
 |
| 出版日期 | 2025-02-18 |
| 卷号 | N/A |
| 关键词 | Alpine grassland Grazing intensity Newly-growing fine roots Root traits QTP |
| ISSN号 | 1385-0237 |
| DOI | 10.1007/s11258-025-01499-w |
| 产权排序 | 1 |
| 文献子类 | Article ; Early Access |
| 英文摘要 | Newly-growing fine roots are essential absorption organs, but their responses to grazing at varying soil depths in alpine grassland remains unclear. Soil samples were taken from 0-10 cm and 10-20 cm depths in alpine grassland within the Lhasa River Basin, Tibet, China. We examined how grazing intensity affected root characteristics (biomass, architecture, morphology, and chemical properties) and root-economic-spectrum by analyzing roots in ingrowth bags. The results revealed that grazing intensity significantly affected root morphology at different soil depths. In the bottom layer, moderate grazing increased root average diameter by 21% but decreased specific root length (SRL) and specific root area (SRA) by 30% and 20%, respectively, indicating that bottom-layer roots became more selective in nutrient acquisition. However, heavy grazing decreased the top layer of root starch content, root length, root surface area, root volume, and root biomass by 12%, 37%, 40%, 44%, and 56%, respectively, but increased SRL and SRA by 71% and 69%, indicating that top-layer roots became morphologically less efficient for nutrient acquisition. Conversely, heavy grazing significantly reduced the bottom layer of root biomass by 68% but increased root length, root surface area, root volume, and root tissue density by 63%, 68%, 73%, and 137%, respectively, and slightly raised root nitrogen content, suggesting bottom-layer roots had greater longevity and resilience. Overall, grazing intensity modified the root characteristics and their root-economic-spectrum across different soil depths. These findings demonstrate grazing intensity affects root functional traits and nutrient acquisitions, highlighting the importance of adjusting grazing intensity for sustainable alpine grasslands management. |
| URL标识 | 查看原文 |
| WOS关键词 | PLANT ECONOMICS SPECTRUM ; FUNCTIONAL TRAITS ; NUTRIENT AVAILABILITY ; LEYMUS-CHINENSIS ; SOIL ; GROWTH ; COMMUNITY ; NITROGEN ; CARBON ; ARCHITECTURE |
| WOS研究方向 | Plant Sciences ; Environmental Sciences & Ecology ; Forestry |
| 语种 | 英语 |
| WOS记录号 | WOS:001424207600001 |
| 出版者 | SPRINGER |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/212321]  |
| 专题 | 拉萨站高原生态系统研究中心_外文论文 |
| 通讯作者 | Wu, Junxi; Zhang, Xianzhou |
| 作者单位 | 1.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 101408, Peoples R China 2.Tibet Univ, Sch Ecol & Environm, Lhasa 850000, Peoples R China; 3.Qinghai Univ, State Key Lab Plateau Ecol & Agr, Xining 810016, Peoples R China; 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Lhasa Plateau Ecosyst Res Stn, Beijing 100101, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Xiang, Mingxue,Luo, Ruikang,Wu, Junxi,et al. Grazing intensity modifies alpine grassland fine root traits on the Qinghai-Tibetan Plateau[J]. PLANT ECOLOGY,2025,N/A. |
| APA | Xiang, Mingxue.,Luo, Ruikang.,Wu, Junxi.,Niu, Ben.,Pan, Ying.,...&Han, Chenglong.(2025).Grazing intensity modifies alpine grassland fine root traits on the Qinghai-Tibetan Plateau.PLANT ECOLOGY,N/A. |
| MLA | Xiang, Mingxue,et al."Grazing intensity modifies alpine grassland fine root traits on the Qinghai-Tibetan Plateau".PLANT ECOLOGY N/A(2025). |
入库方式： OAI收割
来源：地理科学与资源研究所
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