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Supplementary information
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The role of industrial nitrogen in the global nitrogen biogeochemical cycle
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Baojing Gu1,2, Jie Chang2*, Yong Min2, Ying Ge2, Qiuan Zhu3, James N. Galloway4 &
Changhui Peng3,5*
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Policy Simulation Lab, Zhejiang University, Hangzhou 310058, PR China
College of Life Sciences, Zhejiang University, Hangzhou 310058, PR China
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Laboratory for Ecological Forecasting and Global Change, College of Forestry,
Northwest Agriculture and Forest University, Yangling 712100, China
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Department of Environmental Sciences, University of Virginia, Charlottesville, VA
22904, USA
5Department of Biology Science, Institute of Environment Sciences, University of
Quebec at Montreal, Montreal H3C3P8
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whom correspondence should be sent:
Jie Chang, Department of Biological Science, College of Life Sciences, Zhejiang
University, 886 Yuhangtang Road, Hangzhou 310058, PR China.
Tel & Fax: +86 571 8820 6465. E-mail: jchang@zju.edu.cn
Or
Changhui Peng, Department of Biology Science, Institute of Environment Sciences,
University of Quebec at Montreal, Montreal H3C3P8. E-mail: peng.changhui@uqam.ca
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Figure S1. The half-life of different N-containing products. Data from Lin et al. (2000)
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Figure S2 Per capita industrial Nr consumption variations driven by per capita GDP
(PGDP) and urbanization. (a) worldwide from 1960 to 2008, (b) across continental
regions in 2008 with PGDP, (c) across continental regions in 2008 with urbanization. (b)
and (c) share the same group of industrial Nr fluxes, and the continental names in (c)
can also be applied to (b). Detail data sources and calculations can be found in the
Method section in main text.
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Figure S3. Industrial Nr fluxes changes in the nine continental regions in 2008 driven
by (a) GDP and (b) population. Detail data sources and calculations can be found in the
Method section in main text.
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Figure S4 Groundwater NO3 concentration varies among different land use types in
China in 2000s. National MCL represents the maximum contaminant level of
groundwater in China (30 mg NO3-N L-1); WHO MCL represents the maximum
contaminant level of groundwater defined by World Health Organization (10 mg NO3-N
L-1). Different letters on each box represent a significant difference across land use type
(P<0.05). Modified from Gu et al. (2013)
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Figure S5. Nitrogen input to different ecosystems in Greater Hangzhou Area, China.
BNF represents biological N fixation. Data from Gu et al. (2009, 2011).
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References
CPSC (China Pollution Source Census) (2008). The first national census on pollution
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Gu B., Chang J., Ge Y., Ge H., Yuan C., Peng C., et al. (2009). Anthropogenic
modification of the nitrogen cycling within the Greater Hangzhou Area system,
China. Ecol. Appl., 19, 974-988.
Gu B., Zhu Y., Chang J., Peng C., Liu D., Min Y., et al. (2011). The role of technology
and policy in mitigating regional nitrogen pollution. Environ. Res. Lett., 6, 014011.
Gu B., Ge Y., Chang S.X., Luo W., Chang J. (2013). Nitrate in groundwater of China:
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10.1016/j.gloenvcha.2013.05.004
Lin Y. (2000). Pesticides and ecological environment protection. Chemical Industry
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