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	Imbalanced atmospheric nitrogen and phosphorus depositions in China: Implications for nutrient limitation
	Zhu J. X.; Wang, Q. F.; He, N. P.; Smith, M. D.; Elser, J. J.; Du, J. Q.; Yuan, G. F.; Yu, G. R.; Yu, Q.; Yang, F
	2016
关键词	nutrient limitation N:P wet deposition ecological stoichiometry n-p stoichiometry wet deposition terrestrial ecosystems dry deposition fresh-water patterns future forest input availability
英文摘要	Atmospheric wet nitrogen (N) and phosphorus (P) depositions are important sources of bioavailable N and P, and the input of N and P and their ratios significantly influences nutrient availability and balance in terrestrial as well as aquatic ecosystems. Here we monitored atmospheric P depositions by measuring monthly dissolved P concentration in rainfall at 41 field stations in China. Average deposition fluxes of N and P were 13.698.69kgNha(-1)a(-1) (our previous study) and 0.210.17kg P ha(-1)a(-1), respectively. Central and southern China had higher N and P deposition rates than northwest China, northeast China, Inner Mongolia, or Qinghai-Tibet. Atmospheric N and P depositions showed strong seasonal patterns and were dependent upon seasonal precipitation. Fertilizer and energy consumption were significantly correlated with N deposition but less correlated with P deposition. The N:P ratios of atmospheric wet deposition (with the average of 7740, by mass) were negatively correlated with current soil N:P ratios in different ecological regions, suggesting that the imbalanced atmospheric N and P deposition will alter nutrient availability and strengthen P limitation, which may further influence the structure and function of terrestrial ecosystems. The findings provide the assessments of both wet N and P deposition and their N:P ratio across China and indicate potential for strong impacts of atmospheric deposition on broad range of terrestrial ecosystems.
出处	Journal of Geophysical Research-Biogeosciences
卷	121
期	6
页	1605-1616
收录类别	SCI
语种	英语
ISSN号	2169-8953
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/43971]
专题	生态系统网络观测与模拟院重点实验室_生态网络实验室
推荐引用方式 GB/T 7714	Zhu J. X.,Wang, Q. F.,He, N. P.,et al. Imbalanced atmospheric nitrogen and phosphorus depositions in China: Implications for nutrient limitation. 2016.

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