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	Nitrogen addition alters the phenology of a dominant alpine plant in northern Tibet
	Xi Y.; Zhang, T.; Zhang, Y. J.; Zhu, J. T.; Zhang, G. L.; Jiang, Y. B.
	2015
关键词	climate-change reproductive phenology flowering phenology mineral-nutrition wild plants responses plateau temperature ecosystem patterns
英文摘要	Among the various plant traits, phenology is one of the most sensitive to environmental changes. Nitrogen (N) has been reported to be an important factor constraining plant growth, while N deposition is an increasing concern due to social and economic development. However, studies exploring influences of atmospheric N deposition on alpine plant phenology have been barely reported. We conducted a N addition gradient experiment in an alpine meadow on the plateau to examine plants' phenological response. The results suggest that N addition plays an important role in regulating plant phenology, but only for the dominant species; specifically, the budding time of Kobresia pygmaea advanced in response to N addition. The prolonged lengths of flower phase and reproductive period of K. pygmaea were mainly ascribed to an earlier start of the growing season and more resources being allocated to reproductive growth in the N-rich soil. The N addition caused no effect on the phenology of the accompanying species. There were no obvious phenology differences among each N addition treatment. The earlier budding time and the prolonged growing season of the dominant species in response to the N addition means a longer provision duration of food sources to local herders, which can facilitate local economic development.
出处	Arctic Antarctic and Alpine Research
卷	47
期	3
页	511-518
收录类别	SCI
语种	英语
ISSN号	1523-0430
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/38503]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Xi Y.,Zhang, T.,Zhang, Y. J.,et al. Nitrogen addition alters the phenology of a dominant alpine plant in northern Tibet. 2015.

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