Leaf spectral responses of Poa crymophila to nitrogen deposition and climate change on Qinghai-Tibetan Plateau

NWIPB OpenIR

	Leaf spectral responses of Poa crymophila to nitrogen deposition and climate change on Qinghai-Tibetan Plateau
	Hua, Qiaoyi; Yu, Yi; Dong, Shikui; Li, Shuai; Shen, Hao; Han, Yuhui; Zhang, Jing; Xiao, Jianan; Liu, Shiliang; Dong, Quanming; Zhou, Huakun; Wessell, Kelly
	2019
发表期刊	AGRICULTURE ECOSYSTEMS & ENVIRONMENT
卷号	284
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.
关键词	Poacrymophila Spectral reflectance Climate Change Nitrogen deposition
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/60492
专题	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).