Leaf spectral responses of Poa crymophila to nitrogen deposition and climate change on Qinghai-Tibetan Plateau
文献类型：期刊论文
| 作者 | Hua, Qiaoyi; Yu, Yi; Dong, Shikui; Li, Shuai; Shen, Hao; Han, Yuhui; Zhang, Jing; Xiao, Jianan; Liu, Shiliang; Dong, Quanming |
| 刊名 | AGRICULTURE ECOSYSTEMS & ENVIRONMENT
 |
| 出版日期 | 2019 |
| 卷号 | 284 |
| 关键词 | Poacrymophila Spectral reflectance Climate Change Nitrogen deposition |
| 英文摘要 | Temperature and nitrogen (N) are limited factors on the Qinghai-Tibetan Plateau (QTP). Climate change and increasing N deposition on the QTP have posed threats to the sustainability of alpine ecosystems. To examine plant spectral responses to N deposition and climate change, we measured leaf spectral reflectance of Poa crymophila, a common forage species grown in alpine meadow (AM) and alpine steppe (AS) on the eastern QTP under four N addition treatments (CK, 8, 40, 72 kg N ha(-1) yr(-1)). We used natural climate gradients from colder and drier AS to warmer and wetter AM to simulate the climate change on the QTP. Results showed that both N deposition and climate change had significant effects on entire visible and near-infrared regions (p < 0.05), but the interactive effects were insignificant (p > 0.05). Enhanced visible absorption, increased near-infrared reflection, a red shift for red edge and a blue shift for green peak were observed with increasing N addition levels. The modified red edge simple ratio index and photochemical reflective index increased gradually in response to N addition (p < 0.05). These responses indicated that N deposition may make leaf wider and thicker, increase leaf chlorophyll content and photochemical efficiency, and enhance photosynthetic capacity. Climate warming and wetting had opposite effects from N deposition on leaf reflectance of Poa crymophila. These observations showed the potential to monitor the status of Poa crymophila under future climate change and N deposition with leaf spectral measurements. |
| 源URL | [http://210.75.249.4/handle/363003/60492]  |
| 专题 | 西北高原生物研究所_中国科学院西北高原生物研究所 |
| 推荐引用方式 GB/T 7714 | Hua, Qiaoyi,Yu, Yi,Dong, Shikui,et al. Leaf spectral responses of Poa crymophila to nitrogen deposition and climate change on Qinghai-Tibetan Plateau[J]. AGRICULTURE ECOSYSTEMS & ENVIRONMENT,2019,284. |
| APA | Hua, Qiaoyi.,Yu, Yi.,Dong, Shikui.,Li, Shuai.,Shen, Hao.,...&Wessell, Kelly.(2019).Leaf spectral responses of Poa crymophila to nitrogen deposition and climate change on Qinghai-Tibetan Plateau.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,284. |
| MLA | Hua, Qiaoyi,et al."Leaf spectral responses of Poa crymophila to nitrogen deposition and climate change on Qinghai-Tibetan Plateau".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 284(2019). |
入库方式： OAI收割
来源：西北高原生物研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。