Enhanced nitrogen deposition over China

A - Papers appearing in refereed journals

Liu, X., Zhang, Y., Han, W., Tang, A., Shen, J., Cui, J., Vitousek, P., Erisman, J. W., Goulding, K. W. T., Christie, P., Fangmeier, A. and Zhang, F. 2013. Enhanced nitrogen deposition over China. Nature. 494, pp. 459-463.

AuthorsLiu, X., Zhang, Y., Han, W., Tang, A., Shen, J., Cui, J., Vitousek, P., Erisman, J. W., Goulding, K. W. T., Christie, P., Fangmeier, A. and Zhang, F.
Abstract

China is experiencing intense air pollution caused in large part by anthropogenic emissions of reactive nitrogen1,2. These emissions result in the deposition of atmospheric nitrogen (N) in terrestrial and aquatic ecosystems, with implications for human and ecosystem health, greenhouse gas balances and biological diversity1,3,4,5. However, information on the magnitude and environmental impact of N deposition in China is limited. Here we use nationwide data sets on bulk N deposition, plant foliar N and crop N uptake (from long-term unfertilized soils) to evaluate N deposition dynamics and their effect on ecosystems across China between 1980 and 2010. We find that the average annual bulk deposition of N increased by approximately 8 kilograms of nitrogen per hectare (P < 0.001) between the 1980s (13.2 kilograms of nitrogen per hectare) and the 2000s (21.1 kilograms of nitrogen per hectare). Nitrogen deposition rates in the industrialized and agriculturally intensified regions of China are as high as the peak levels of deposition in northwestern Europe in the 1980s6, before the introduction of mitigation measures7,8. Nitrogen from ammonium (NH4+) is the dominant form of N in bulk deposition, but the rate of increase is largest for deposition of N from nitrate (NO3−), in agreement with decreased ratios of NH3 to NOx emissions since 1980. We also find that the impact of N deposition on Chinese ecosystems includes significantly increased plant foliar N concentrations in natural and semi-natural (that is, non-agricultural) ecosystems and increased crop N uptake from long-term-unfertilized croplands. China and other economies are facing a continuing challenge to reduce emissions of reactive nitrogen, N deposition and their negative effects on human health and the environment.

Year of Publication2013
JournalNature
Journal citation494, pp. 459-463
Digital Object Identifier (DOI)doi:10.1038/nature11917
Open accessPublished as non-open access
FunderBiotechnology and Biological Sciences Research Council
Funder project or codeDelivering Sustainable Systems (SS) [ISPG]
The Rothamsted Long-Term Experiments including Sample Archive and e-RA database [2012-2017]
Optimisation of nutrients in soil-plant systems: How can we control nitrogen cycling in soil?
Output statusPublished
Publication dates
Online20 Feb 2013
Publication process dates
Accepted15 Jan 2013
PublisherNature Publishing Group
Copyright licensePublisher copyright
ISSN0028-0836

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